./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --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 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:56:13,372 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:56:13,476 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:56:13,481 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:56:13,482 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:56:13,515 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:56:13,516 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:56:13,517 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:56:13,518 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:56:13,523 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:56:13,523 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:56:13,524 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:56:13,524 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:56:13,526 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:56:13,526 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:56:13,527 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:56:13,527 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:56:13,528 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:56:13,528 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:56:13,528 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:56:13,529 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:56:13,529 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:56:13,530 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:56:13,530 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:56:13,531 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:56:13,531 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:56:13,531 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:56:13,532 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:56:13,533 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:56:13,546 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:56:13,547 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:56:13,547 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:56:13,548 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:56:13,548 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:56:13,548 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:56:13,548 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:56:13,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:56:13,549 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:56:13,549 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:56:13,550 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:56:13,550 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:56:13,550 INFO L153 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_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 [2023-11-26 11:56:13,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:56:13,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:56:13,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:56:13,875 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:56:13,875 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:56:13,877 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2023-11-26 11:56:17,053 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:56:17,256 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:56:17,257 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2023-11-26 11:56:17,266 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/data/1a2ec84a6/2dede65c8e3f424ca85104daf4899332/FLAGcfb9950af [2023-11-26 11:56:17,281 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/data/1a2ec84a6/2dede65c8e3f424ca85104daf4899332 [2023-11-26 11:56:17,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:56:17,286 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:56:17,287 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:56:17,287 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:56:17,293 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:56:17,294 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:56:17" (1/1) ... [2023-11-26 11:56:17,295 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@132dbaa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:17, skipping insertion in model container [2023-11-26 11:56:17,296 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:56:17" (1/1) ... [2023-11-26 11:56:17,324 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:56:17,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:56:17,558 ERROR L324 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) [2023-11-26 11:56:17,559 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1502025b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:17, skipping insertion in model container [2023-11-26 11:56:17,559 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:56:17,560 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-26 11:56:17,562 INFO L158 Benchmark]: Toolchain (without parser) took 275.57ms. Allocated memory is still 151.0MB. Free memory was 112.0MB in the beginning and 101.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-26 11:56:17,563 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 151.0MB. Free memory was 120.3MB in the beginning and 120.1MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:56:17,564 INFO L158 Benchmark]: CACSL2BoogieTranslator took 272.79ms. Allocated memory is still 151.0MB. Free memory was 112.0MB in the beginning and 101.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-26 11:56:17,569 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 151.0MB. Free memory was 120.3MB in the beginning and 120.1MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 272.79ms. Allocated memory is still 151.0MB. Free memory was 112.0MB in the beginning and 101.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 102]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --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 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:56:20,099 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:56:20,207 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-26 11:56:20,216 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:56:20,216 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:56:20,268 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:56:20,269 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:56:20,270 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:56:20,271 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:56:20,276 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:56:20,276 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:56:20,277 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:56:20,278 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:56:20,279 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:56:20,280 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:56:20,280 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:56:20,281 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:56:20,281 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:56:20,282 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:56:20,283 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:56:20,284 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:56:20,284 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:56:20,285 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:56:20,285 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:56:20,286 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:56:20,286 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-26 11:56:20,287 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-26 11:56:20,287 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:56:20,288 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:56:20,288 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:56:20,290 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:56:20,290 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:56:20,291 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:56:20,291 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:56:20,291 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:56:20,292 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:56:20,293 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:56:20,293 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-26 11:56:20,293 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-26 11:56:20,294 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:56:20,294 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:56:20,294 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:56:20,295 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:56:20,295 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-26 11:56:20,296 INFO L153 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_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 [2023-11-26 11:56:20,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:56:20,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:56:20,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:56:20,745 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:56:20,745 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:56:20,747 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2023-11-26 11:56:23,999 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:56:24,254 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:56:24,255 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2023-11-26 11:56:24,264 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/data/40948fd1c/278610701a6c41b5856b06d25955d84d/FLAGfa88da10d [2023-11-26 11:56:24,279 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/data/40948fd1c/278610701a6c41b5856b06d25955d84d [2023-11-26 11:56:24,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:56:24,283 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:56:24,284 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:56:24,285 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:56:24,290 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:56:24,291 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:56:24" (1/1) ... [2023-11-26 11:56:24,292 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9600e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:24, skipping insertion in model container [2023-11-26 11:56:24,292 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:56:24" (1/1) ... [2023-11-26 11:56:24,318 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:56:24,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:56:24,573 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-26 11:56:24,579 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:56:24,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:56:24,663 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:56:24,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:56:24,744 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:56:24,744 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:24 WrapperNode [2023-11-26 11:56:24,744 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:56:24,746 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:56:24,746 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:56:24,746 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:56:24,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:24" (1/1) ... [2023-11-26 11:56:24,767 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:24" (1/1) ... [2023-11-26 11:56:24,817 INFO L138 Inliner]: procedures = 28, calls = 51, calls flagged for inlining = 19, calls inlined = 25, statements flattened = 289 [2023-11-26 11:56:24,817 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:56:24,818 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:56:24,818 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:56:24,818 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:56:24,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:24" (1/1) ... [2023-11-26 11:56:24,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:24" (1/1) ... [2023-11-26 11:56:24,836 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:24" (1/1) ... [2023-11-26 11:56:24,874 INFO L175 MemorySlicer]: Split 22 memory accesses to 5 slices as follows [2, 6, 2, 10, 2]. 45 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 2, 1, 2, 1]. [2023-11-26 11:56:24,874 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:24" (1/1) ... [2023-11-26 11:56:24,874 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:24" (1/1) ... [2023-11-26 11:56:24,893 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:24" (1/1) ... [2023-11-26 11:56:24,898 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:24" (1/1) ... [2023-11-26 11:56:24,902 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:24" (1/1) ... [2023-11-26 11:56:24,905 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:24" (1/1) ... [2023-11-26 11:56:24,911 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:56:24,912 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:56:24,912 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:56:24,912 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:56:24,913 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:24" (1/1) ... [2023-11-26 11:56:24,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:56:24,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:24,948 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:56:24,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:56:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:56:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2023-11-26 11:56:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2023-11-26 11:56:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2023-11-26 11:56:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#3 [2023-11-26 11:56:24,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#4 [2023-11-26 11:56:24,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-26 11:56:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-26 11:56:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-26 11:56:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-26 11:56:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-26 11:56:24,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:56:24,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-26 11:56:24,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-26 11:56:24,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-26 11:56:24,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-26 11:56:24,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-26 11:56:24,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:56:24,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:56:24,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:56:24,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:56:24,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:56:25,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:56:25,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:56:25,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2023-11-26 11:56:25,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2023-11-26 11:56:25,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#2 [2023-11-26 11:56:25,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#3 [2023-11-26 11:56:25,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#4 [2023-11-26 11:56:25,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:56:25,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-26 11:56:25,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-26 11:56:25,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-26 11:56:25,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-26 11:56:25,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-26 11:56:25,005 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:56:25,206 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:56:25,208 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:56:26,106 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:56:26,694 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:56:26,695 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 11:56:26,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:56:26 BoogieIcfgContainer [2023-11-26 11:56:26,695 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:56:26,698 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:56:26,698 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:56:26,702 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:56:26,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:56:24" (1/3) ... [2023-11-26 11:56:26,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6176a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:56:26, skipping insertion in model container [2023-11-26 11:56:26,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:24" (2/3) ... [2023-11-26 11:56:26,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6176a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:56:26, skipping insertion in model container [2023-11-26 11:56:26,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:56:26" (3/3) ... [2023-11-26 11:56:26,707 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2023-11-26 11:56:26,729 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:56:26,729 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-11-26 11:56:26,730 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:56:26,840 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:56:26,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 95 transitions, 204 flow [2023-11-26 11:56:26,967 INFO L124 PetriNetUnfolderBase]: 8/93 cut-off events. [2023-11-26 11:56:26,967 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:56:26,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 8/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 261 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2023-11-26 11:56:26,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 95 transitions, 204 flow [2023-11-26 11:56:26,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 92 transitions, 196 flow [2023-11-26 11:56:27,004 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:56:27,015 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;@41026d77, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:56:27,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2023-11-26 11:56:27,021 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:56:27,021 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-26 11:56:27,021 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:56:27,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:27,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:56:27,023 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-26 11:56:27,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:27,031 INFO L85 PathProgramCache]: Analyzing trace with hash 934249, now seen corresponding path program 1 times [2023-11-26 11:56:27,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:56:27,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079737547] [2023-11-26 11:56:27,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:27,053 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 [2023-11-26 11:56:27,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:56:27,060 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:56:27,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:56:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:27,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:56:27,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:27,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:56:27,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:27,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 11:56:27,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:27,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 11:56:27,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:27,375 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 11:56:27,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:27,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-26 11:56:27,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:27,409 INFO L378 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 11:56:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:27,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:27,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:56:27,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079737547] [2023-11-26 11:56:27,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079737547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:27,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:27,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:56:27,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606051214] [2023-11-26 11:56:27,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:27,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:56:27,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:56:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:56:27,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:27,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 95 [2023-11-26 11:56:27,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:27,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:27,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 95 [2023-11-26 11:56:27,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:27,997 INFO L124 PetriNetUnfolderBase]: 185/616 cut-off events. [2023-11-26 11:56:27,998 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-26 11:56:28,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 616 events. 185/616 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3834 event pairs, 112 based on Foata normal form. 1/434 useless extension candidates. Maximal degree in co-relation 823. Up to 292 conditions per place. [2023-11-26 11:56:28,012 INFO L140 encePairwiseOnDemand]: 90/95 looper letters, 32 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-11-26 11:56:28,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 88 transitions, 256 flow [2023-11-26 11:56:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:56:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:56:28,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2023-11-26 11:56:28,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7298245614035088 [2023-11-26 11:56:28,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2023-11-26 11:56:28,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2023-11-26 11:56:28,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:28,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2023-11-26 11:56:28,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:28,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:28,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:28,048 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 196 flow. Second operand 3 states and 208 transitions. [2023-11-26 11:56:28,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 88 transitions, 256 flow [2023-11-26 11:56:28,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 88 transitions, 248 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:56:28,057 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 184 flow [2023-11-26 11:56:28,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2023-11-26 11:56:28,064 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -6 predicate places. [2023-11-26 11:56:28,064 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 184 flow [2023-11-26 11:56:28,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:28,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:28,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:56:28,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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)] Ended with exit code 0 [2023-11-26 11:56:28,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:56:28,268 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-26 11:56:28,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:28,269 INFO L85 PathProgramCache]: Analyzing trace with hash 934250, now seen corresponding path program 1 times [2023-11-26 11:56:28,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:56:28,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894657085] [2023-11-26 11:56:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:28,275 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 [2023-11-26 11:56:28,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:56:28,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:56:28,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:56:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:28,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:56:28,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:28,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-26 11:56:28,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:28,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:56:28,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:28,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 11:56:28,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:28,464 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 11:56:28,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:28,479 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 11:56:28,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:28,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:56:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:28,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:28,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:56:28,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894657085] [2023-11-26 11:56:28,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894657085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:28,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:28,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:56:28,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730573685] [2023-11-26 11:56:28,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:28,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:56:28,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:56:28,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:56:28,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:56:28,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 95 [2023-11-26 11:56:28,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:28,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:28,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 95 [2023-11-26 11:56:28,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:29,513 INFO L124 PetriNetUnfolderBase]: 186/621 cut-off events. [2023-11-26 11:56:29,513 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-26 11:56:29,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 621 events. 186/621 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3852 event pairs, 112 based on Foata normal form. 0/437 useless extension candidates. Maximal degree in co-relation 904. Up to 301 conditions per place. [2023-11-26 11:56:29,524 INFO L140 encePairwiseOnDemand]: 87/95 looper letters, 35 selfloop transitions, 6 changer transitions 0/93 dead transitions. [2023-11-26 11:56:29,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 93 transitions, 278 flow [2023-11-26 11:56:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:56:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:56:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 272 transitions. [2023-11-26 11:56:29,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7157894736842105 [2023-11-26 11:56:29,533 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 272 transitions. [2023-11-26 11:56:29,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 272 transitions. [2023-11-26 11:56:29,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:29,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 272 transitions. [2023-11-26 11:56:29,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:29,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:29,543 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:29,543 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 184 flow. Second operand 4 states and 272 transitions. [2023-11-26 11:56:29,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 93 transitions, 278 flow [2023-11-26 11:56:29,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 93 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:56:29,549 INFO L231 Difference]: Finished difference. Result has 88 places, 92 transitions, 219 flow [2023-11-26 11:56:29,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=88, PETRI_TRANSITIONS=92} [2023-11-26 11:56:29,552 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -3 predicate places. [2023-11-26 11:56:29,552 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 92 transitions, 219 flow [2023-11-26 11:56:29,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:29,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:29,553 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-26 11:56:29,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:56:29,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:56:29,756 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-26 11:56:29,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:29,756 INFO L85 PathProgramCache]: Analyzing trace with hash 897844199, now seen corresponding path program 1 times [2023-11-26 11:56:29,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:56:29,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590848245] [2023-11-26 11:56:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:29,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:56:29,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:56:29,758 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:56:29,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:56:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:29,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:56:29,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:29,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-26 11:56:29,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:29,920 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 11:56:29,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:29,935 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 11:56:29,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:29,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:56:29,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:29,961 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 11:56:29,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:29,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:56:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:30,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:30,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:56:30,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590848245] [2023-11-26 11:56:30,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [590848245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:30,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:56:30,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-26 11:56:30,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515974245] [2023-11-26 11:56:30,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:30,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:56:30,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:56:30,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:56:30,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:56:32,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 95 [2023-11-26 11:56:32,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 92 transitions, 219 flow. Second operand has 10 states, 10 states have (on average 58.0) internal successors, (580), 10 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:32,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:32,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 95 [2023-11-26 11:56:32,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:35,034 INFO L124 PetriNetUnfolderBase]: 192/639 cut-off events. [2023-11-26 11:56:35,034 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-26 11:56:35,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1004 conditions, 639 events. 192/639 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3942 event pairs, 112 based on Foata normal form. 0/452 useless extension candidates. Maximal degree in co-relation 913. Up to 304 conditions per place. [2023-11-26 11:56:35,041 INFO L140 encePairwiseOnDemand]: 86/95 looper letters, 35 selfloop transitions, 24 changer transitions 0/111 dead transitions. [2023-11-26 11:56:35,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 111 transitions, 408 flow [2023-11-26 11:56:35,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:56:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:56:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 635 transitions. [2023-11-26 11:56:35,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6684210526315789 [2023-11-26 11:56:35,047 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 635 transitions. [2023-11-26 11:56:35,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 635 transitions. [2023-11-26 11:56:35,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:35,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 635 transitions. [2023-11-26 11:56:35,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 63.5) internal successors, (635), 10 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:35,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 95.0) internal successors, (1045), 11 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:35,055 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 95.0) internal successors, (1045), 11 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:35,055 INFO L175 Difference]: Start difference. First operand has 88 places, 92 transitions, 219 flow. Second operand 10 states and 635 transitions. [2023-11-26 11:56:35,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 111 transitions, 408 flow [2023-11-26 11:56:35,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 111 transitions, 408 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:56:35,064 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 374 flow [2023-11-26 11:56:35,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=374, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2023-11-26 11:56:35,069 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 9 predicate places. [2023-11-26 11:56:35,069 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 374 flow [2023-11-26 11:56:35,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 58.0) internal successors, (580), 10 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:35,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:35,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:35,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:56:35,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:56:35,273 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-26 11:56:35,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:35,274 INFO L85 PathProgramCache]: Analyzing trace with hash -460111189, now seen corresponding path program 1 times [2023-11-26 11:56:35,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:56:35,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739515779] [2023-11-26 11:56:35,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:35,275 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 [2023-11-26 11:56:35,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:56:35,276 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:56:35,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:56:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:35,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:56:35,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:35,399 INFO L378 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 [2023-11-26 11:56:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:56:35,410 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:35,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:56:35,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739515779] [2023-11-26 11:56:35,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739515779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:35,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:35,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:56:35,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115618828] [2023-11-26 11:56:35,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:35,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:56:35,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:56:35,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:56:35,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:35,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 95 [2023-11-26 11:56:35,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:35,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:35,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 95 [2023-11-26 11:56:35,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:35,863 INFO L124 PetriNetUnfolderBase]: 192/637 cut-off events. [2023-11-26 11:56:35,863 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-26 11:56:35,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046 conditions, 637 events. 192/637 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3935 event pairs, 112 based on Foata normal form. 0/457 useless extension candidates. Maximal degree in co-relation 987. Up to 311 conditions per place. [2023-11-26 11:56:35,871 INFO L140 encePairwiseOnDemand]: 91/95 looper letters, 51 selfloop transitions, 6 changer transitions 0/109 dead transitions. [2023-11-26 11:56:35,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 109 transitions, 484 flow [2023-11-26 11:56:35,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:56:35,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:56:35,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 207 transitions. [2023-11-26 11:56:35,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7263157894736842 [2023-11-26 11:56:35,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 207 transitions. [2023-11-26 11:56:35,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 207 transitions. [2023-11-26 11:56:35,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:35,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 207 transitions. [2023-11-26 11:56:35,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:35,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:35,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:35,878 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 374 flow. Second operand 3 states and 207 transitions. [2023-11-26 11:56:35,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 109 transitions, 484 flow [2023-11-26 11:56:35,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 109 transitions, 432 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-11-26 11:56:35,886 INFO L231 Difference]: Finished difference. Result has 96 places, 109 transitions, 330 flow [2023-11-26 11:56:35,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=96, PETRI_TRANSITIONS=109} [2023-11-26 11:56:35,887 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 5 predicate places. [2023-11-26 11:56:35,888 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 109 transitions, 330 flow [2023-11-26 11:56:35,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:35,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:35,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:35,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:56:36,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:56:36,092 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-26 11:56:36,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash -460111188, now seen corresponding path program 1 times [2023-11-26 11:56:36,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:56:36,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536434604] [2023-11-26 11:56:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:36,093 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 [2023-11-26 11:56:36,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:56:36,094 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:56:36,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:56:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:36,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:56:36,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:36,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 11:56:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:56:36,345 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:36,345 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:56:36,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536434604] [2023-11-26 11:56:36,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536434604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:36,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:36,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:56:36,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665867677] [2023-11-26 11:56:36,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:36,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:56:36,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:56:36,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:56:36,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:56:36,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 95 [2023-11-26 11:56:36,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 109 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 58.4) internal successors, (292), 5 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:36,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:36,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 95 [2023-11-26 11:56:36,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:37,312 INFO L124 PetriNetUnfolderBase]: 193/640 cut-off events. [2023-11-26 11:56:37,312 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-26 11:56:37,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1034 conditions, 640 events. 193/640 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3934 event pairs, 112 based on Foata normal form. 0/458 useless extension candidates. Maximal degree in co-relation 981. Up to 319 conditions per place. [2023-11-26 11:56:37,319 INFO L140 encePairwiseOnDemand]: 89/95 looper letters, 53 selfloop transitions, 9 changer transitions 0/112 dead transitions. [2023-11-26 11:56:37,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 112 transitions, 460 flow [2023-11-26 11:56:37,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:56:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:56:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 325 transitions. [2023-11-26 11:56:37,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6842105263157895 [2023-11-26 11:56:37,322 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 325 transitions. [2023-11-26 11:56:37,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 325 transitions. [2023-11-26 11:56:37,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:37,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 325 transitions. [2023-11-26 11:56:37,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:37,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:37,326 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:37,326 INFO L175 Difference]: Start difference. First operand has 96 places, 109 transitions, 330 flow. Second operand 5 states and 325 transitions. [2023-11-26 11:56:37,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 112 transitions, 460 flow [2023-11-26 11:56:37,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 112 transitions, 448 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:56:37,331 INFO L231 Difference]: Finished difference. Result has 100 places, 112 transitions, 359 flow [2023-11-26 11:56:37,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=359, PETRI_PLACES=100, PETRI_TRANSITIONS=112} [2023-11-26 11:56:37,332 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 9 predicate places. [2023-11-26 11:56:37,333 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 112 transitions, 359 flow [2023-11-26 11:56:37,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.4) internal successors, (292), 5 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:37,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:37,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:37,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-26 11:56:37,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:56:37,536 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-26 11:56:37,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:37,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1378543421, now seen corresponding path program 1 times [2023-11-26 11:56:37,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:56:37,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465858923] [2023-11-26 11:56:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:37,539 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 [2023-11-26 11:56:37,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:56:37,542 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:56:37,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:56:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:37,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:56:37,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:37,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 11:56:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:56:37,756 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:37,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:56:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465858923] [2023-11-26 11:56:37,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465858923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:37,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:37,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:56:37,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570410952] [2023-11-26 11:56:37,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:37,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:56:37,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:56:37,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:56:37,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:56:38,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 95 [2023-11-26 11:56:38,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 112 transitions, 359 flow. Second operand has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:38,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:38,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 95 [2023-11-26 11:56:38,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:38,843 INFO L124 PetriNetUnfolderBase]: 194/643 cut-off events. [2023-11-26 11:56:38,843 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-26 11:56:38,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1052 conditions, 643 events. 194/643 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3955 event pairs, 112 based on Foata normal form. 0/460 useless extension candidates. Maximal degree in co-relation 1022. Up to 314 conditions per place. [2023-11-26 11:56:38,850 INFO L140 encePairwiseOnDemand]: 89/95 looper letters, 56 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2023-11-26 11:56:38,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 115 transitions, 495 flow [2023-11-26 11:56:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:56:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:56:38,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 325 transitions. [2023-11-26 11:56:38,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6842105263157895 [2023-11-26 11:56:38,854 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 325 transitions. [2023-11-26 11:56:38,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 325 transitions. [2023-11-26 11:56:38,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:38,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 325 transitions. [2023-11-26 11:56:38,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:38,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:38,857 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:38,858 INFO L175 Difference]: Start difference. First operand has 100 places, 112 transitions, 359 flow. Second operand 5 states and 325 transitions. [2023-11-26 11:56:38,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 115 transitions, 495 flow [2023-11-26 11:56:38,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 115 transitions, 486 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:56:38,863 INFO L231 Difference]: Finished difference. Result has 104 places, 115 transitions, 388 flow [2023-11-26 11:56:38,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=388, PETRI_PLACES=104, PETRI_TRANSITIONS=115} [2023-11-26 11:56:38,864 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 13 predicate places. [2023-11-26 11:56:38,865 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 115 transitions, 388 flow [2023-11-26 11:56:38,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:38,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:38,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:38,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:56:39,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:56:39,069 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-26 11:56:39,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1378543466, now seen corresponding path program 1 times [2023-11-26 11:56:39,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:56:39,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792481991] [2023-11-26 11:56:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:39,070 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 [2023-11-26 11:56:39,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:56:39,071 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:56:39,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:56:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:39,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:56:39,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:56:39,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:39,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:56:39,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792481991] [2023-11-26 11:56:39,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792481991] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:39,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:39,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:56:39,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517371955] [2023-11-26 11:56:39,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:39,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:56:39,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:56:39,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:56:39,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:56:39,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 95 [2023-11-26 11:56:39,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 115 transitions, 388 flow. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:39,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:39,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 95 [2023-11-26 11:56:39,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:39,815 INFO L124 PetriNetUnfolderBase]: 193/642 cut-off events. [2023-11-26 11:56:39,816 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-26 11:56:39,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1061 conditions, 642 events. 193/642 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3910 event pairs, 112 based on Foata normal form. 1/465 useless extension candidates. Maximal degree in co-relation 1030. Up to 319 conditions per place. [2023-11-26 11:56:39,824 INFO L140 encePairwiseOnDemand]: 91/95 looper letters, 55 selfloop transitions, 7 changer transitions 0/114 dead transitions. [2023-11-26 11:56:39,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 114 transitions, 505 flow [2023-11-26 11:56:39,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:56:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:56:39,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 273 transitions. [2023-11-26 11:56:39,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.718421052631579 [2023-11-26 11:56:39,827 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 273 transitions. [2023-11-26 11:56:39,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 273 transitions. [2023-11-26 11:56:39,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:39,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 273 transitions. [2023-11-26 11:56:39,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:39,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:39,853 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:39,853 INFO L175 Difference]: Start difference. First operand has 104 places, 115 transitions, 388 flow. Second operand 4 states and 273 transitions. [2023-11-26 11:56:39,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 114 transitions, 505 flow [2023-11-26 11:56:39,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 114 transitions, 494 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:56:39,858 INFO L231 Difference]: Finished difference. Result has 105 places, 114 transitions, 384 flow [2023-11-26 11:56:39,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=384, PETRI_PLACES=105, PETRI_TRANSITIONS=114} [2023-11-26 11:56:39,859 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 14 predicate places. [2023-11-26 11:56:39,859 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 114 transitions, 384 flow [2023-11-26 11:56:39,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:39,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:39,860 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:39,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:56:40,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:56:40,063 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-26 11:56:40,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:40,064 INFO L85 PathProgramCache]: Analyzing trace with hash 214809318, now seen corresponding path program 1 times [2023-11-26 11:56:40,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:56:40,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629555764] [2023-11-26 11:56:40,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:40,065 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 [2023-11-26 11:56:40,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:56:40,066 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:56:40,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:56:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:40,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:56:40,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:40,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 11:56:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:56:40,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:56:41,007 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:56:41,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629555764] [2023-11-26 11:56:41,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629555764] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:41,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:56:41,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-26 11:56:41,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811628935] [2023-11-26 11:56:41,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:41,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:56:41,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:56:41,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:56:41,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:56:43,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 95 [2023-11-26 11:56:43,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 114 transitions, 384 flow. Second operand has 11 states, 11 states have (on average 58.63636363636363) internal successors, (645), 11 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:43,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:43,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 95 [2023-11-26 11:56:43,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:46,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:56:47,188 INFO L124 PetriNetUnfolderBase]: 197/654 cut-off events. [2023-11-26 11:56:47,188 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-26 11:56:47,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1103 conditions, 654 events. 197/654 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3981 event pairs, 112 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 1063. Up to 320 conditions per place. [2023-11-26 11:56:47,196 INFO L140 encePairwiseOnDemand]: 85/95 looper letters, 53 selfloop transitions, 23 changer transitions 0/126 dead transitions. [2023-11-26 11:56:47,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 126 transitions, 590 flow [2023-11-26 11:56:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:56:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 11:56:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 684 transitions. [2023-11-26 11:56:47,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6545454545454545 [2023-11-26 11:56:47,201 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 684 transitions. [2023-11-26 11:56:47,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 684 transitions. [2023-11-26 11:56:47,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:47,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 684 transitions. [2023-11-26 11:56:47,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 62.18181818181818) internal successors, (684), 11 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:47,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 95.0) internal successors, (1140), 12 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:47,208 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 95.0) internal successors, (1140), 12 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:47,208 INFO L175 Difference]: Start difference. First operand has 105 places, 114 transitions, 384 flow. Second operand 11 states and 684 transitions. [2023-11-26 11:56:47,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 126 transitions, 590 flow [2023-11-26 11:56:47,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 126 transitions, 576 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:56:47,213 INFO L231 Difference]: Finished difference. Result has 116 places, 126 transitions, 506 flow [2023-11-26 11:56:47,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=506, PETRI_PLACES=116, PETRI_TRANSITIONS=126} [2023-11-26 11:56:47,214 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 25 predicate places. [2023-11-26 11:56:47,214 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 126 transitions, 506 flow [2023-11-26 11:56:47,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 58.63636363636363) internal successors, (645), 11 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:47,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:47,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:47,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-26 11:56:47,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:56:47,418 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-26 11:56:47,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:47,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1930844259, now seen corresponding path program 1 times [2023-11-26 11:56:47,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:56:47,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112638305] [2023-11-26 11:56:47,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:47,419 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 [2023-11-26 11:56:47,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:56:47,420 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:56:47,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:56:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:47,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:56:47,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:56:47,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:47,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:56:47,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112638305] [2023-11-26 11:56:47,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112638305] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:47,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:47,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:56:47,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578173991] [2023-11-26 11:56:47,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:47,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:56:47,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:56:47,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:56:47,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:56:47,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 95 [2023-11-26 11:56:47,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 126 transitions, 506 flow. Second operand has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:47,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:47,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 95 [2023-11-26 11:56:47,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:48,039 INFO L124 PetriNetUnfolderBase]: 196/653 cut-off events. [2023-11-26 11:56:48,040 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-26 11:56:48,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 653 events. 196/653 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3940 event pairs, 112 based on Foata normal form. 1/475 useless extension candidates. Maximal degree in co-relation 1079. Up to 329 conditions per place. [2023-11-26 11:56:48,047 INFO L140 encePairwiseOnDemand]: 90/95 looper letters, 66 selfloop transitions, 7 changer transitions 0/125 dead transitions. [2023-11-26 11:56:48,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 125 transitions, 644 flow [2023-11-26 11:56:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:56:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:56:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 275 transitions. [2023-11-26 11:56:48,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7236842105263158 [2023-11-26 11:56:48,049 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 275 transitions. [2023-11-26 11:56:48,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 275 transitions. [2023-11-26 11:56:48,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:48,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 275 transitions. [2023-11-26 11:56:48,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:48,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:48,053 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:48,053 INFO L175 Difference]: Start difference. First operand has 116 places, 126 transitions, 506 flow. Second operand 4 states and 275 transitions. [2023-11-26 11:56:48,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 125 transitions, 644 flow [2023-11-26 11:56:48,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 125 transitions, 603 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-11-26 11:56:48,059 INFO L231 Difference]: Finished difference. Result has 115 places, 125 transitions, 471 flow [2023-11-26 11:56:48,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=471, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2023-11-26 11:56:48,060 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 24 predicate places. [2023-11-26 11:56:48,061 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 471 flow [2023-11-26 11:56:48,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:48,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:48,061 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-26 11:56:48,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-26 11:56:48,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:56:48,264 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-26 11:56:48,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:48,264 INFO L85 PathProgramCache]: Analyzing trace with hash -482310178, now seen corresponding path program 2 times [2023-11-26 11:56:48,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:56:48,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922942366] [2023-11-26 11:56:48,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:56:48,265 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 [2023-11-26 11:56:48,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:56:48,267 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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) [2023-11-26 11:56:48,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60160c6e-1686-4464-bcb2-c529a3614b62/bin/uautomizer-verify-VRDe98Ueme/mathsat -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 [2023-11-26 11:56:48,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:56:48,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:56:48,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:56:48,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:48,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-26 11:56:48,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:48,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:56:48,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:48,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:56:48,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:48,442 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 11:56:48,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:48,455 INFO L378 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 11:56:48,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:56:48,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 11:56:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:48,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:49,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:56:49,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922942366] [2023-11-26 11:56:49,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922942366] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:49,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:56:49,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-26 11:56:49,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511931991] [2023-11-26 11:56:49,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:49,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:56:49,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:56:49,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:56:49,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:56:56,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 95 [2023-11-26 11:56:56,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 471 flow. Second operand has 14 states, 14 states have (on average 58.57142857142857) internal successors, (820), 14 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:56,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:56,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 95 [2023-11-26 11:56:56,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:01,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:57:03,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:57:06,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:57:08,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:57:10,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-26 11:57:13,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []