./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:46:21,140 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:46:21,243 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:46:21,249 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:46:21,250 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:46:21,279 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:46:21,280 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:46:21,280 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:46:21,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:46:21,282 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:46:21,283 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:46:21,284 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:46:21,284 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:46:21,285 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:46:21,286 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:46:21,286 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:46:21,287 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:46:21,287 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:46:21,288 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:46:21,289 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:46:21,289 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:46:21,290 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:46:21,291 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:46:21,291 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:46:21,292 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:46:21,293 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:46:21,293 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:46:21,294 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:46:21,295 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:46:21,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:46:21,296 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:46:21,296 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:46:21,297 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:46:21,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:46:21,298 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:46:21,298 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:46:21,299 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:46:21,299 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:46:21,299 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_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca [2023-11-06 22:46:21,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:46:21,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:46:21,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:46:21,662 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:46:21,664 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:46:21,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2023-11-06 22:46:24,845 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:46:25,153 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:46:25,153 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2023-11-06 22:46:25,171 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/data/5600d97e9/72ee0199c0c44792a15ea67aa33de641/FLAG74b30ed4e [2023-11-06 22:46:25,191 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/data/5600d97e9/72ee0199c0c44792a15ea67aa33de641 [2023-11-06 22:46:25,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:46:25,203 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:46:25,206 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:46:25,206 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:46:25,212 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:46:25,215 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:25" (1/1) ... [2023-11-06 22:46:25,217 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f02da44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:25, skipping insertion in model container [2023-11-06 22:46:25,217 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:25" (1/1) ... [2023-11-06 22:46:25,254 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:46:25,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:46:25,521 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) [2023-11-06 22:46:25,521 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@13ddaf5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:25, skipping insertion in model container [2023-11-06 22:46:25,522 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:46:25,522 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 22:46:25,529 INFO L158 Benchmark]: Toolchain (without parser) took 320.71ms. Allocated memory is still 167.8MB. Free memory was 122.1MB in the beginning and 112.5MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-06 22:46:25,529 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 113.2MB. Free memory is still 64.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:46:25,530 INFO L158 Benchmark]: CACSL2BoogieTranslator took 316.35ms. Allocated memory is still 167.8MB. Free memory was 122.1MB in the beginning and 112.5MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-06 22:46:25,532 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 113.2MB. Free memory is still 64.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 316.35ms. Allocated memory is still 167.8MB. Free memory was 122.1MB in the beginning and 112.5MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 100]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:46:28,148 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:46:28,238 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 22:46:28,244 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:46:28,245 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:46:28,274 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:46:28,275 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:46:28,276 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:46:28,277 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:46:28,277 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:46:28,278 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:46:28,279 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:46:28,279 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:46:28,280 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:46:28,281 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:46:28,282 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:46:28,282 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:46:28,283 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:46:28,284 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:46:28,284 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:46:28,285 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:46:28,286 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:46:28,286 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:46:28,287 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:46:28,287 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:46:28,288 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:46:28,288 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:46:28,289 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:46:28,290 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:46:28,290 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:46:28,291 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:46:28,291 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:46:28,292 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:46:28,292 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:46:28,293 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:46:28,293 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:46:28,294 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:46:28,294 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:46:28,294 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:46:28,295 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:46:28,295 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:46:28,295 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_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca [2023-11-06 22:46:28,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:46:28,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:46:28,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:46:28,743 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:46:28,743 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:46:28,745 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2023-11-06 22:46:31,966 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:46:32,242 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:46:32,243 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2023-11-06 22:46:32,252 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/data/9253f96d3/9061cc9c807741d1bf774d2df84340c6/FLAG78e35dac6 [2023-11-06 22:46:32,268 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/data/9253f96d3/9061cc9c807741d1bf774d2df84340c6 [2023-11-06 22:46:32,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:46:32,278 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:46:32,280 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:46:32,280 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:46:32,285 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:46:32,286 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:32" (1/1) ... [2023-11-06 22:46:32,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e747951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:32, skipping insertion in model container [2023-11-06 22:46:32,288 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:32" (1/1) ... [2023-11-06 22:46:32,323 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:46:32,570 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:46:32,585 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:46:32,590 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:46:32,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:46:32,612 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:46:32,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:46:32,654 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:46:32,655 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:32 WrapperNode [2023-11-06 22:46:32,655 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:46:32,656 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:46:32,656 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:46:32,656 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:46:32,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:32" (1/1) ... [2023-11-06 22:46:32,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:32" (1/1) ... [2023-11-06 22:46:32,702 INFO L138 Inliner]: procedures = 26, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2023-11-06 22:46:32,702 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:46:32,703 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:46:32,703 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:46:32,703 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:46:32,712 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:32" (1/1) ... [2023-11-06 22:46:32,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:32" (1/1) ... [2023-11-06 22:46:32,717 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:32" (1/1) ... [2023-11-06 22:46:32,718 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:32" (1/1) ... [2023-11-06 22:46:32,727 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:32" (1/1) ... [2023-11-06 22:46:32,731 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:32" (1/1) ... [2023-11-06 22:46:32,734 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:32" (1/1) ... [2023-11-06 22:46:32,736 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:32" (1/1) ... [2023-11-06 22:46:32,739 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:46:32,740 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:46:32,741 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:46:32,741 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:46:32,742 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:32" (1/1) ... [2023-11-06 22:46:32,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:46:32,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:32,847 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:46:32,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:46:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:46:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:46:32,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:46:32,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 22:46:32,902 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:46:32,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:46:32,903 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:46:32,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:46:32,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:46:32,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:46:32,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:46:32,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:46:32,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:46:32,906 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:46:33,030 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:46:33,032 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:46:33,563 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:46:33,573 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:46:33,573 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:46:33,576 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:33 BoogieIcfgContainer [2023-11-06 22:46:33,576 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:46:33,592 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:46:33,593 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:46:33,606 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:46:33,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:32" (1/3) ... [2023-11-06 22:46:33,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f2f0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:33, skipping insertion in model container [2023-11-06 22:46:33,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:32" (2/3) ... [2023-11-06 22:46:33,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f2f0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:33, skipping insertion in model container [2023-11-06 22:46:33,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:33" (3/3) ... [2023-11-06 22:46:33,613 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2023-11-06 22:46:33,634 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:46:33,635 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-11-06 22:46:33,635 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:46:33,832 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:46:33,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 202 transitions, 418 flow [2023-11-06 22:46:34,039 INFO L124 PetriNetUnfolderBase]: 15/200 cut-off events. [2023-11-06 22:46:34,040 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:46:34,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 200 events. 15/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 321 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 109. Up to 2 conditions per place. [2023-11-06 22:46:34,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 202 transitions, 418 flow [2023-11-06 22:46:34,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 195 transitions, 402 flow [2023-11-06 22:46:34,070 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:46:34,085 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 187 places, 195 transitions, 402 flow [2023-11-06 22:46:34,089 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 187 places, 195 transitions, 402 flow [2023-11-06 22:46:34,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 195 transitions, 402 flow [2023-11-06 22:46:34,181 INFO L124 PetriNetUnfolderBase]: 15/195 cut-off events. [2023-11-06 22:46:34,181 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:46:34,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 195 events. 15/195 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 322 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 109. Up to 2 conditions per place. [2023-11-06 22:46:34,202 INFO L119 LiptonReduction]: Number of co-enabled transitions 4156 [2023-11-06 22:47:00,780 INFO L134 LiptonReduction]: Checked pairs total: 4279 [2023-11-06 22:47:00,781 INFO L136 LiptonReduction]: Total number of compositions: 230 [2023-11-06 22:47:00,798 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:47:00,806 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;@6373095d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:47:00,807 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2023-11-06 22:47:00,812 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:47:00,813 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:47:00,813 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:47:00,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:00,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:47:00,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:47:00,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:00,821 INFO L85 PathProgramCache]: Analyzing trace with hash 25806, now seen corresponding path program 1 times [2023-11-06 22:47:00,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:47:00,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951833710] [2023-11-06 22:47:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:00,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:47:00,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:47:00,849 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:47:00,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:47:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:00,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:47:00,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:01,106 INFO L351 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 [2023-11-06 22:47:01,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:47:01,164 INFO L351 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 [2023-11-06 22:47:01,194 INFO L351 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 [2023-11-06 22:47:01,227 INFO L351 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 [2023-11-06 22:47:01,252 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:47:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:01,304 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:47:01,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:47:01,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951833710] [2023-11-06 22:47:01,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951833710] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:01,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:01,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:47:01,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036621260] [2023-11-06 22:47:01,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:01,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:47:01,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:47:01,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:47:01,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:47:01,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 432 [2023-11-06 22:47:01,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:01,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:01,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 432 [2023-11-06 22:47:01,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:02,339 INFO L124 PetriNetUnfolderBase]: 530/752 cut-off events. [2023-11-06 22:47:02,340 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 22:47:02,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1523 conditions, 752 events. 530/752 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 3179 event pairs, 251 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 1302. Up to 745 conditions per place. [2023-11-06 22:47:02,357 INFO L140 encePairwiseOnDemand]: 424/432 looper letters, 32 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2023-11-06 22:47:02,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 164 flow [2023-11-06 22:47:02,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:47:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:47:02,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2023-11-06 22:47:02,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44521604938271603 [2023-11-06 22:47:02,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2023-11-06 22:47:02,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2023-11-06 22:47:02,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:02,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2023-11-06 22:47:02,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:02,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:02,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:02,428 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 84 flow. Second operand 3 states and 577 transitions. [2023-11-06 22:47:02,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 164 flow [2023-11-06 22:47:02,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 39 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:47:02,437 INFO L231 Difference]: Finished difference. Result has 37 places, 38 transitions, 105 flow [2023-11-06 22:47:02,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=37, PETRI_TRANSITIONS=38} [2023-11-06 22:47:02,447 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -3 predicate places. [2023-11-06 22:47:02,447 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 38 transitions, 105 flow [2023-11-06 22:47:02,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:02,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:02,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:47:02,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:02,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:47:02,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:47:02,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:02,676 INFO L85 PathProgramCache]: Analyzing trace with hash 803119, now seen corresponding path program 1 times [2023-11-06 22:47:02,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:47:02,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102737069] [2023-11-06 22:47:02,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:02,678 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 [2023-11-06 22:47:02,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:47:02,680 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:47:02,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:47:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:02,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:47:02,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:02,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:02,832 INFO L351 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 13 [2023-11-06 22:47:02,844 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:47:02,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:02,929 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:47:02,930 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-06 22:47:02,941 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:47:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:47:03,164 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:47:03,164 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:47:03,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102737069] [2023-11-06 22:47:03,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102737069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:03,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:03,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:47:03,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441237842] [2023-11-06 22:47:03,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:03,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:47:03,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:47:03,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:47:03,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:47:03,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 432 [2023-11-06 22:47:03,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 38 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:03,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:03,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 432 [2023-11-06 22:47:03,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:03,998 INFO L124 PetriNetUnfolderBase]: 400/581 cut-off events. [2023-11-06 22:47:03,999 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:47:03,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 581 events. 400/581 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 2397 event pairs, 189 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 1142. Up to 575 conditions per place. [2023-11-06 22:47:04,006 INFO L140 encePairwiseOnDemand]: 429/432 looper letters, 32 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-11-06 22:47:04,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 35 transitions, 160 flow [2023-11-06 22:47:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:47:04,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:47:04,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2023-11-06 22:47:04,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390432098765432 [2023-11-06 22:47:04,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2023-11-06 22:47:04,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2023-11-06 22:47:04,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:04,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2023-11-06 22:47:04,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:04,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:04,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:04,024 INFO L175 Difference]: Start difference. First operand has 37 places, 38 transitions, 105 flow. Second operand 3 states and 569 transitions. [2023-11-06 22:47:04,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 35 transitions, 160 flow [2023-11-06 22:47:04,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:47:04,027 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 92 flow [2023-11-06 22:47:04,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-11-06 22:47:04,029 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2023-11-06 22:47:04,029 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 92 flow [2023-11-06 22:47:04,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:04,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:04,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:47:04,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:47:04,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:47:04,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:47:04,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:04,245 INFO L85 PathProgramCache]: Analyzing trace with hash 803117, now seen corresponding path program 1 times [2023-11-06 22:47:04,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:47:04,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879773580] [2023-11-06 22:47:04,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:04,246 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 [2023-11-06 22:47:04,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:47:04,248 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:47:04,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:47:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:04,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:47:04,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:04,409 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 22:47:04,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-06 22:47:04,444 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:47:04,444 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-06 22:47:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:47:04,520 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:47:04,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:47:04,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879773580] [2023-11-06 22:47:04,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879773580] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:04,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:04,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:47:04,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117065725] [2023-11-06 22:47:04,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:04,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:47:04,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:47:04,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:47:04,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:47:04,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 432 [2023-11-06 22:47:04,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:04,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:04,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 432 [2023-11-06 22:47:04,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:05,092 INFO L124 PetriNetUnfolderBase]: 270/410 cut-off events. [2023-11-06 22:47:05,092 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:47:05,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 410 events. 270/410 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 1665 event pairs, 127 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 823. Up to 404 conditions per place. [2023-11-06 22:47:05,098 INFO L140 encePairwiseOnDemand]: 429/432 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-11-06 22:47:05,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 142 flow [2023-11-06 22:47:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:47:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:47:05,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 558 transitions. [2023-11-06 22:47:05,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2023-11-06 22:47:05,102 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 558 transitions. [2023-11-06 22:47:05,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 558 transitions. [2023-11-06 22:47:05,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:05,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 558 transitions. [2023-11-06 22:47:05,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:05,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:05,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:05,110 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 92 flow. Second operand 3 states and 558 transitions. [2023-11-06 22:47:05,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 142 flow [2023-11-06 22:47:05,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:47:05,113 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 83 flow [2023-11-06 22:47:05,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-11-06 22:47:05,115 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2023-11-06 22:47:05,116 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 83 flow [2023-11-06 22:47:05,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:05,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:05,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:47:05,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:47:05,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:47:05,328 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:47:05,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:05,329 INFO L85 PathProgramCache]: Analyzing trace with hash 25807, now seen corresponding path program 1 times [2023-11-06 22:47:05,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:47:05,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910574046] [2023-11-06 22:47:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:05,330 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 [2023-11-06 22:47:05,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:47:05,332 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:47:05,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:47:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:05,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:47:05,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:05,399 INFO L351 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 [2023-11-06 22:47:05,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:05,407 INFO L351 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 [2023-11-06 22:47:05,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:05,425 INFO L351 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 [2023-11-06 22:47:05,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:05,434 INFO L351 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 [2023-11-06 22:47:05,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:05,443 INFO L351 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 [2023-11-06 22:47:05,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:05,448 INFO L351 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 [2023-11-06 22:47:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:05,453 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:47:05,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:47:05,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910574046] [2023-11-06 22:47:05,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910574046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:05,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:05,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:47:05,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159872270] [2023-11-06 22:47:05,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:05,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:47:05,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:47:05,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:47:05,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:47:05,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 432 [2023-11-06 22:47:05,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:05,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:05,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 432 [2023-11-06 22:47:05,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:05,865 INFO L124 PetriNetUnfolderBase]: 270/408 cut-off events. [2023-11-06 22:47:05,866 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:47:05,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 828 conditions, 408 events. 270/408 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 1674 event pairs, 127 based on Foata normal form. 2/129 useless extension candidates. Maximal degree in co-relation 819. Up to 399 conditions per place. [2023-11-06 22:47:05,869 INFO L140 encePairwiseOnDemand]: 429/432 looper letters, 26 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-11-06 22:47:05,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 139 flow [2023-11-06 22:47:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:47:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:47:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2023-11-06 22:47:05,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359567901234568 [2023-11-06 22:47:05,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2023-11-06 22:47:05,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2023-11-06 22:47:05,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:05,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2023-11-06 22:47:05,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:05,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:05,881 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:05,881 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 83 flow. Second operand 3 states and 565 transitions. [2023-11-06 22:47:05,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 139 flow [2023-11-06 22:47:05,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 136 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:47:05,883 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 84 flow [2023-11-06 22:47:05,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-06 22:47:05,884 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2023-11-06 22:47:05,885 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 84 flow [2023-11-06 22:47:05,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:05,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:05,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:47:05,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:47:06,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:47:06,097 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:47:06,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:06,098 INFO L85 PathProgramCache]: Analyzing trace with hash 803038, now seen corresponding path program 1 times [2023-11-06 22:47:06,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:47:06,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543108233] [2023-11-06 22:47:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:06,099 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 [2023-11-06 22:47:06,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:47:06,101 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:47:06,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:47:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:06,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:47:06,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:06,227 INFO L351 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 [2023-11-06 22:47:06,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:06,248 INFO L351 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 [2023-11-06 22:47:06,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:06,259 INFO L351 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 [2023-11-06 22:47:06,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:06,273 INFO L351 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 [2023-11-06 22:47:06,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:06,287 INFO L351 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 [2023-11-06 22:47:06,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:06,301 INFO L351 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 [2023-11-06 22:47:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:06,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:06,683 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:47:06,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543108233] [2023-11-06 22:47:06,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543108233] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:47:06,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:47:06,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 22:47:06,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944171735] [2023-11-06 22:47:06,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:06,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:47:06,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:47:06,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:47:06,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:47:07,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 432 [2023-11-06 22:47:07,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:07,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:07,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 432 [2023-11-06 22:47:07,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:08,602 INFO L124 PetriNetUnfolderBase]: 273/414 cut-off events. [2023-11-06 22:47:08,603 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:47:08,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 414 events. 273/414 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 1687 event pairs, 127 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 841. Up to 405 conditions per place. [2023-11-06 22:47:08,607 INFO L140 encePairwiseOnDemand]: 428/432 looper letters, 26 selfloop transitions, 9 changer transitions 0/37 dead transitions. [2023-11-06 22:47:08,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 37 transitions, 184 flow [2023-11-06 22:47:08,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:47:08,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:47:08,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1076 transitions. [2023-11-06 22:47:08,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41512345679012347 [2023-11-06 22:47:08,615 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1076 transitions. [2023-11-06 22:47:08,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1076 transitions. [2023-11-06 22:47:08,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:08,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1076 transitions. [2023-11-06 22:47:08,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 179.33333333333334) internal successors, (1076), 6 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:08,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 432.0) internal successors, (3024), 7 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:08,632 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 432.0) internal successors, (3024), 7 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:08,633 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 84 flow. Second operand 6 states and 1076 transitions. [2023-11-06 22:47:08,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 37 transitions, 184 flow [2023-11-06 22:47:08,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:47:08,636 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 139 flow [2023-11-06 22:47:08,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=139, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-06 22:47:08,638 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2023-11-06 22:47:08,638 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 139 flow [2023-11-06 22:47:08,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:08,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:08,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:47:08,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:08,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:47:08,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:47:08,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash 24894144, now seen corresponding path program 1 times [2023-11-06 22:47:08,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:47:08,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602935555] [2023-11-06 22:47:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:08,856 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 [2023-11-06 22:47:08,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:47:08,858 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:47:08,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:47:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:08,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:47:08,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:08,979 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:47:08,980 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:47:08,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602935555] [2023-11-06 22:47:08,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602935555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:08,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:08,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:47:08,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10476385] [2023-11-06 22:47:08,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:08,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:47:08,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:47:08,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:47:08,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:47:09,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 432 [2023-11-06 22:47:09,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:09,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:09,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 432 [2023-11-06 22:47:09,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:09,435 INFO L124 PetriNetUnfolderBase]: 272/413 cut-off events. [2023-11-06 22:47:09,435 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:47:09,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 413 events. 272/413 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 1671 event pairs, 127 based on Foata normal form. 1/134 useless extension candidates. Maximal degree in co-relation 851. Up to 407 conditions per place. [2023-11-06 22:47:09,440 INFO L140 encePairwiseOnDemand]: 429/432 looper letters, 32 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-11-06 22:47:09,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 201 flow [2023-11-06 22:47:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:47:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:47:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2023-11-06 22:47:09,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390432098765432 [2023-11-06 22:47:09,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2023-11-06 22:47:09,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2023-11-06 22:47:09,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:09,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2023-11-06 22:47:09,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:09,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:09,454 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:09,454 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 139 flow. Second operand 3 states and 569 transitions. [2023-11-06 22:47:09,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 201 flow [2023-11-06 22:47:09,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 36 transitions, 181 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-06 22:47:09,458 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 117 flow [2023-11-06 22:47:09,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2023-11-06 22:47:09,460 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-11-06 22:47:09,460 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 117 flow [2023-11-06 22:47:09,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:09,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:09,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:47:09,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:47:09,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:47:09,675 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:47:09,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:09,675 INFO L85 PathProgramCache]: Analyzing trace with hash 771814096, now seen corresponding path program 1 times [2023-11-06 22:47:09,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:47:09,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836302864] [2023-11-06 22:47:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:09,676 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 [2023-11-06 22:47:09,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:47:09,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:47:09,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:47:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:09,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:47:09,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:09,814 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:47:09,814 INFO L351 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 22:47:09,841 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:47:09,841 INFO L351 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 22:47:09,878 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:47:09,879 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 22:47:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:47:09,990 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:47:09,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:47:09,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836302864] [2023-11-06 22:47:09,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836302864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:09,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:09,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:47:09,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424581422] [2023-11-06 22:47:09,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:09,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:47:09,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:47:09,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:47:09,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:47:10,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 432 [2023-11-06 22:47:10,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:10,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:10,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 432 [2023-11-06 22:47:10,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:10,476 INFO L124 PetriNetUnfolderBase]: 251/379 cut-off events. [2023-11-06 22:47:10,476 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-06 22:47:10,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 379 events. 251/379 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 1498 event pairs, 117 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 775. Up to 373 conditions per place. [2023-11-06 22:47:10,481 INFO L140 encePairwiseOnDemand]: 429/432 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-11-06 22:47:10,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 34 transitions, 177 flow [2023-11-06 22:47:10,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:47:10,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:47:10,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 555 transitions. [2023-11-06 22:47:10,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42824074074074076 [2023-11-06 22:47:10,486 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 555 transitions. [2023-11-06 22:47:10,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 555 transitions. [2023-11-06 22:47:10,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:10,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 555 transitions. [2023-11-06 22:47:10,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:10,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:10,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:10,494 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 117 flow. Second operand 3 states and 555 transitions. [2023-11-06 22:47:10,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 34 transitions, 177 flow [2023-11-06 22:47:10,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 173 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:47:10,497 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 111 flow [2023-11-06 22:47:10,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-11-06 22:47:10,499 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-11-06 22:47:10,499 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 111 flow [2023-11-06 22:47:10,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:10,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:10,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:47:10,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:47:10,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:47:10,714 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:47:10,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:10,714 INFO L85 PathProgramCache]: Analyzing trace with hash 771814097, now seen corresponding path program 1 times [2023-11-06 22:47:10,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:47:10,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528664539] [2023-11-06 22:47:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:10,715 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 [2023-11-06 22:47:10,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:47:10,717 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:47:10,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:47:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:10,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:47:10,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:10,894 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:47:10,895 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-06 22:47:10,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:10,945 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:47:10,945 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 22:47:10,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:10,986 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:47:10,986 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 22:47:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:11,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:11,755 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:47:11,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528664539] [2023-11-06 22:47:11,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528664539] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:47:11,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:47:11,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 22:47:11,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43454121] [2023-11-06 22:47:11,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:11,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:47:11,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:47:11,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:47:11,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:47:13,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 432 [2023-11-06 22:47:13,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 111 flow. Second operand has 8 states, 8 states have (on average 169.25) internal successors, (1354), 8 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:13,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:13,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 432 [2023-11-06 22:47:13,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:13,792 INFO L124 PetriNetUnfolderBase]: 230/345 cut-off events. [2023-11-06 22:47:13,792 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-06 22:47:13,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 345 events. 230/345 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 1318 event pairs, 107 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 706. Up to 337 conditions per place. [2023-11-06 22:47:13,795 INFO L140 encePairwiseOnDemand]: 427/432 looper letters, 26 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2023-11-06 22:47:13,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 167 flow [2023-11-06 22:47:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:47:13,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:47:13,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 868 transitions. [2023-11-06 22:47:13,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40185185185185185 [2023-11-06 22:47:13,801 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 868 transitions. [2023-11-06 22:47:13,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 868 transitions. [2023-11-06 22:47:13,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:13,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 868 transitions. [2023-11-06 22:47:13,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.6) internal successors, (868), 5 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:13,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:13,810 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:13,810 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 111 flow. Second operand 5 states and 868 transitions. [2023-11-06 22:47:13,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 167 flow [2023-11-06 22:47:13,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 32 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:47:13,812 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 114 flow [2023-11-06 22:47:13,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2023-11-06 22:47:13,813 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2023-11-06 22:47:13,814 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 114 flow [2023-11-06 22:47:13,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 169.25) internal successors, (1354), 8 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:13,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:13,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:47:13,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:14,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:47:14,032 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:47:14,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:14,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1843573568, now seen corresponding path program 1 times [2023-11-06 22:47:14,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:47:14,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340089199] [2023-11-06 22:47:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:14,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:47:14,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:47:14,035 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:47:14,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:47:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:14,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:47:14,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:14,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:14,417 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-11-06 22:47:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:14,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:47:14,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340089199] [2023-11-06 22:47:14,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340089199] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:47:14,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:47:14,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 22:47:14,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349738328] [2023-11-06 22:47:14,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:14,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:47:14,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:47:14,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:47:14,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:47:16,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 432 [2023-11-06 22:47:16,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 114 flow. Second operand has 8 states, 8 states have (on average 171.25) internal successors, (1370), 8 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:16,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:16,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 432 [2023-11-06 22:47:16,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:17,791 INFO L124 PetriNetUnfolderBase]: 303/473 cut-off events. [2023-11-06 22:47:17,791 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-06 22:47:17,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 473 events. 303/473 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 2136 event pairs, 67 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 969. Up to 288 conditions per place. [2023-11-06 22:47:17,796 INFO L140 encePairwiseOnDemand]: 427/432 looper letters, 39 selfloop transitions, 8 changer transitions 0/49 dead transitions. [2023-11-06 22:47:17,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 245 flow [2023-11-06 22:47:17,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:47:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:47:17,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1064 transitions. [2023-11-06 22:47:17,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4104938271604938 [2023-11-06 22:47:17,803 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1064 transitions. [2023-11-06 22:47:17,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1064 transitions. [2023-11-06 22:47:17,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:17,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1064 transitions. [2023-11-06 22:47:17,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 177.33333333333334) internal successors, (1064), 6 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:17,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 432.0) internal successors, (3024), 7 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:17,815 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 432.0) internal successors, (3024), 7 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:17,816 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 114 flow. Second operand 6 states and 1064 transitions. [2023-11-06 22:47:17,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 245 flow [2023-11-06 22:47:17,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 239 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:47:17,821 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 135 flow [2023-11-06 22:47:17,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=135, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-11-06 22:47:17,822 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2023-11-06 22:47:17,823 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 135 flow [2023-11-06 22:47:17,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 171.25) internal successors, (1370), 8 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:17,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:17,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:47:17,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:18,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:47:18,037 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:47:18,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:18,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1843573566, now seen corresponding path program 1 times [2023-11-06 22:47:18,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:47:18,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045401382] [2023-11-06 22:47:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:18,038 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 [2023-11-06 22:47:18,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:47:18,039 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:47:18,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:47:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:18,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:47:18,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:18,141 INFO L351 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 [2023-11-06 22:47:18,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:18,174 INFO L351 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 [2023-11-06 22:47:18,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:18,186 INFO L351 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 [2023-11-06 22:47:18,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:18,192 INFO L351 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 [2023-11-06 22:47:18,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:18,213 INFO L351 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 [2023-11-06 22:47:18,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:18,218 INFO L351 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 [2023-11-06 22:47:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:47:18,240 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:47:18,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:47:18,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045401382] [2023-11-06 22:47:18,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045401382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:18,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:18,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:47:18,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643396976] [2023-11-06 22:47:18,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:18,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:47:18,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:47:18,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:47:18,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:47:18,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 432 [2023-11-06 22:47:18,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:18,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:18,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 432 [2023-11-06 22:47:18,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:18,745 INFO L124 PetriNetUnfolderBase]: 160/266 cut-off events. [2023-11-06 22:47:18,745 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-06 22:47:18,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 266 events. 160/266 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1031 event pairs, 89 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 609. Up to 254 conditions per place. [2023-11-06 22:47:18,748 INFO L140 encePairwiseOnDemand]: 427/432 looper letters, 23 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-11-06 22:47:18,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 30 transitions, 185 flow [2023-11-06 22:47:18,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:47:18,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:47:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 699 transitions. [2023-11-06 22:47:18,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045138888888889 [2023-11-06 22:47:18,753 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 699 transitions. [2023-11-06 22:47:18,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 699 transitions. [2023-11-06 22:47:18,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:18,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 699 transitions. [2023-11-06 22:47:18,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.75) internal successors, (699), 4 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:18,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 432.0) internal successors, (2160), 5 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:18,761 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 432.0) internal successors, (2160), 5 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:18,761 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 135 flow. Second operand 4 states and 699 transitions. [2023-11-06 22:47:18,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 30 transitions, 185 flow [2023-11-06 22:47:18,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 30 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:47:18,764 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 132 flow [2023-11-06 22:47:18,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-11-06 22:47:18,765 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2023-11-06 22:47:18,765 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 132 flow [2023-11-06 22:47:18,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:18,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:18,766 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:47:18,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:18,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:47:18,978 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:47:18,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:18,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1843468082, now seen corresponding path program 2 times [2023-11-06 22:47:18,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:47:18,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877632458] [2023-11-06 22:47:18,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:47:18,980 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 [2023-11-06 22:47:18,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:47:18,981 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:47:19,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-06 22:47:19,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:47:19,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:47:19,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:47:19,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:19,113 INFO L351 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 [2023-11-06 22:47:19,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:19,125 INFO L351 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 [2023-11-06 22:47:19,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:19,139 INFO L351 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 [2023-11-06 22:47:19,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:19,150 INFO L351 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 [2023-11-06 22:47:19,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:19,164 INFO L351 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 [2023-11-06 22:47:19,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:19,192 INFO L351 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 [2023-11-06 22:47:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:19,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:19,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:47:19,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877632458] [2023-11-06 22:47:19,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877632458] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:47:19,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:47:19,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:47:19,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779051555] [2023-11-06 22:47:19,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:19,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:47:19,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:47:19,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:47:19,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:47:25,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 432 [2023-11-06 22:47:25,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 132 flow. Second operand has 12 states, 12 states have (on average 175.0) internal successors, (2100), 12 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:25,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:25,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 432 [2023-11-06 22:47:25,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:27,705 INFO L124 PetriNetUnfolderBase]: 166/278 cut-off events. [2023-11-06 22:47:27,705 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-11-06 22:47:27,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 278 events. 166/278 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1087 event pairs, 89 based on Foata normal form. 6/170 useless extension candidates. Maximal degree in co-relation 659. Up to 264 conditions per place. [2023-11-06 22:47:27,707 INFO L140 encePairwiseOnDemand]: 428/432 looper letters, 20 selfloop transitions, 20 changer transitions 0/42 dead transitions. [2023-11-06 22:47:27,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 42 transitions, 314 flow [2023-11-06 22:47:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:47:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:47:27,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2133 transitions. [2023-11-06 22:47:27,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4114583333333333 [2023-11-06 22:47:27,718 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2133 transitions. [2023-11-06 22:47:27,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2133 transitions. [2023-11-06 22:47:27,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:27,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2133 transitions. [2023-11-06 22:47:27,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 177.75) internal successors, (2133), 12 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:27,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 432.0) internal successors, (5616), 13 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:27,738 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 432.0) internal successors, (5616), 13 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:27,738 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 132 flow. Second operand 12 states and 2133 transitions. [2023-11-06 22:47:27,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 42 transitions, 314 flow [2023-11-06 22:47:27,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:47:27,741 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 296 flow [2023-11-06 22:47:27,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=296, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2023-11-06 22:47:27,742 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2023-11-06 22:47:27,742 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 296 flow [2023-11-06 22:47:27,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 175.0) internal successors, (2100), 12 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:27,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:27,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:27,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:27,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:47:27,956 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:47:27,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1316204964, now seen corresponding path program 1 times [2023-11-06 22:47:27,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:47:27,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255034306] [2023-11-06 22:47:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:27,956 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 [2023-11-06 22:47:27,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:47:27,957 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:47:27,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-06 22:47:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:28,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:47:28,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:28,085 INFO L351 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 [2023-11-06 22:47:28,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:28,103 INFO L351 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 [2023-11-06 22:47:28,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:28,116 INFO L351 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 [2023-11-06 22:47:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:28,125 INFO L351 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 [2023-11-06 22:47:28,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:28,139 INFO L351 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 [2023-11-06 22:47:28,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:28,148 INFO L351 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 [2023-11-06 22:47:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:47:28,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:47:29,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:47:29,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255034306] [2023-11-06 22:47:29,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255034306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:47:29,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:47:29,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 22:47:29,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948324279] [2023-11-06 22:47:29,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:29,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:47:29,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:47:29,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:47:29,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:47:33,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 432 [2023-11-06 22:47:33,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 296 flow. Second operand has 8 states, 8 states have (on average 170.5) internal successors, (1364), 8 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:33,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:33,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 432 [2023-11-06 22:47:33,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:35,001 INFO L124 PetriNetUnfolderBase]: 278/490 cut-off events. [2023-11-06 22:47:35,002 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-11-06 22:47:35,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 490 events. 278/490 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2201 event pairs, 149 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 1150. Up to 266 conditions per place. [2023-11-06 22:47:35,007 INFO L140 encePairwiseOnDemand]: 424/432 looper letters, 57 selfloop transitions, 9 changer transitions 0/68 dead transitions. [2023-11-06 22:47:35,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 68 transitions, 496 flow [2023-11-06 22:47:35,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:47:35,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:47:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1411 transitions. [2023-11-06 22:47:35,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40827546296296297 [2023-11-06 22:47:35,018 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1411 transitions. [2023-11-06 22:47:35,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1411 transitions. [2023-11-06 22:47:35,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:35,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1411 transitions. [2023-11-06 22:47:35,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 176.375) internal successors, (1411), 8 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:35,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 432.0) internal successors, (3888), 9 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:35,042 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 432.0) internal successors, (3888), 9 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:35,042 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 296 flow. Second operand 8 states and 1411 transitions. [2023-11-06 22:47:35,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 68 transitions, 496 flow [2023-11-06 22:47:35,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 68 transitions, 416 flow, removed 32 selfloop flow, removed 5 redundant places. [2023-11-06 22:47:35,047 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 253 flow [2023-11-06 22:47:35,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=253, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-11-06 22:47:35,048 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2023-11-06 22:47:35,048 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 253 flow [2023-11-06 22:47:35,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 170.5) internal successors, (1364), 8 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:35,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:35,049 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:35,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:35,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:47:35,261 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:47:35,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:35,262 INFO L85 PathProgramCache]: Analyzing trace with hash 690585164, now seen corresponding path program 2 times [2023-11-06 22:47:35,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:47:35,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622328298] [2023-11-06 22:47:35,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:47:35,262 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 [2023-11-06 22:47:35,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:47:35,264 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:47:35,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-06 22:47:35,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:47:35,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:47:35,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:47:35,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:35,397 INFO L351 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 [2023-11-06 22:47:35,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:35,415 INFO L351 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 [2023-11-06 22:47:35,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:35,433 INFO L351 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 [2023-11-06 22:47:35,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:35,454 INFO L351 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 [2023-11-06 22:47:35,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:35,463 INFO L351 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 [2023-11-06 22:47:35,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:35,475 INFO L351 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 [2023-11-06 22:47:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 22:47:35,650 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:47:35,650 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:47:35,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622328298] [2023-11-06 22:47:35,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622328298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:47:35,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:47:35,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:47:35,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245387568] [2023-11-06 22:47:35,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:47:35,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:47:35,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:47:35,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:47:35,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:47:35,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 432 [2023-11-06 22:47:35,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 253 flow. Second operand has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:35,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:35,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 432 [2023-11-06 22:47:35,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:36,240 INFO L124 PetriNetUnfolderBase]: 179/341 cut-off events. [2023-11-06 22:47:36,240 INFO L125 PetriNetUnfolderBase]: For 226/226 co-relation queries the response was YES. [2023-11-06 22:47:36,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 819 conditions, 341 events. 179/341 cut-off events. For 226/226 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1478 event pairs, 90 based on Foata normal form. 23/292 useless extension candidates. Maximal degree in co-relation 795. Up to 313 conditions per place. [2023-11-06 22:47:36,243 INFO L140 encePairwiseOnDemand]: 426/432 looper letters, 25 selfloop transitions, 11 changer transitions 0/38 dead transitions. [2023-11-06 22:47:36,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 38 transitions, 299 flow [2023-11-06 22:47:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:47:36,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:47:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 724 transitions. [2023-11-06 22:47:36,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41898148148148145 [2023-11-06 22:47:36,247 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 724 transitions. [2023-11-06 22:47:36,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 724 transitions. [2023-11-06 22:47:36,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:36,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 724 transitions. [2023-11-06 22:47:36,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:36,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 432.0) internal successors, (2160), 5 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:36,254 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 432.0) internal successors, (2160), 5 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:36,254 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 253 flow. Second operand 4 states and 724 transitions. [2023-11-06 22:47:36,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 38 transitions, 299 flow [2023-11-06 22:47:36,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 38 transitions, 269 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-11-06 22:47:36,258 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 219 flow [2023-11-06 22:47:36,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2023-11-06 22:47:36,286 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2023-11-06 22:47:36,287 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 219 flow [2023-11-06 22:47:36,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:47:36,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:36,287 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-11-06 22:47:36,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:36,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:47:36,496 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:47:36,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1077210830, now seen corresponding path program 3 times [2023-11-06 22:47:36,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:47:36,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635725124] [2023-11-06 22:47:36,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:47:36,497 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 [2023-11-06 22:47:36,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:47:36,512 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:47:36,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-06 22:47:36,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:47:36,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:47:36,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:47:36,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:36,746 INFO L351 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 [2023-11-06 22:47:36,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:36,770 INFO L351 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 [2023-11-06 22:47:36,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:36,783 INFO L351 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 [2023-11-06 22:47:36,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:36,791 INFO L351 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 [2023-11-06 22:47:36,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:36,803 INFO L351 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 [2023-11-06 22:47:36,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:47:36,811 INFO L351 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 [2023-11-06 22:47:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:37,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:47:40,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:47:40,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635725124] [2023-11-06 22:47:40,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635725124] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:47:40,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:47:40,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-11-06 22:47:40,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603144170] [2023-11-06 22:47:40,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:40,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:47:40,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:47:40,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:47:40,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:48:00,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 432 [2023-11-06 22:48:01,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 219 flow. Second operand has 24 states, 24 states have (on average 174.0) internal successors, (4176), 24 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:01,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:01,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 432 [2023-11-06 22:48:01,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:16,941 INFO L124 PetriNetUnfolderBase]: 191/365 cut-off events. [2023-11-06 22:48:16,941 INFO L125 PetriNetUnfolderBase]: For 420/420 co-relation queries the response was YES. [2023-11-06 22:48:16,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 365 events. 191/365 cut-off events. For 420/420 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1547 event pairs, 90 based on Foata normal form. 12/305 useless extension candidates. Maximal degree in co-relation 924. Up to 328 conditions per place. [2023-11-06 22:48:16,944 INFO L140 encePairwiseOnDemand]: 428/432 looper letters, 15 selfloop transitions, 45 changer transitions 0/62 dead transitions. [2023-11-06 22:48:16,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 62 transitions, 555 flow [2023-11-06 22:48:16,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:48:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 22:48:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4396 transitions. [2023-11-06 22:48:16,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40703703703703703 [2023-11-06 22:48:16,960 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4396 transitions. [2023-11-06 22:48:16,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4396 transitions. [2023-11-06 22:48:16,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:16,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4396 transitions. [2023-11-06 22:48:16,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 175.84) internal successors, (4396), 25 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:16,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 432.0) internal successors, (11232), 26 states have internal predecessors, (11232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:16,996 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 432.0) internal successors, (11232), 26 states have internal predecessors, (11232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:16,997 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 219 flow. Second operand 25 states and 4396 transitions. [2023-11-06 22:48:16,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 62 transitions, 555 flow [2023-11-06 22:48:16,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 62 transitions, 531 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:48:17,001 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 505 flow [2023-11-06 22:48:17,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=505, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2023-11-06 22:48:17,002 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 32 predicate places. [2023-11-06 22:48:17,003 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 505 flow [2023-11-06 22:48:17,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 174.0) internal successors, (4176), 24 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:17,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:17,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:17,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:17,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:48:17,217 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:48:17,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:17,218 INFO L85 PathProgramCache]: Analyzing trace with hash 990667512, now seen corresponding path program 1 times [2023-11-06 22:48:17,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:48:17,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662550051] [2023-11-06 22:48:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:17,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:48:17,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:48:17,219 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:48:17,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-06 22:48:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:17,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:48:17,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:17,472 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:48:17,473 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 72 [2023-11-06 22:48:17,478 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 70 [2023-11-06 22:48:17,484 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 68 [2023-11-06 22:48:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:17,536 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:48:17,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:48:17,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662550051] [2023-11-06 22:48:17,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662550051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:48:17,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:48:17,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:48:17,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604164477] [2023-11-06 22:48:17,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:17,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:48:17,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:48:17,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:48:17,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:48:17,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 432 [2023-11-06 22:48:17,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 505 flow. Second operand has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:17,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:17,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 432 [2023-11-06 22:48:17,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:18,135 INFO L124 PetriNetUnfolderBase]: 263/476 cut-off events. [2023-11-06 22:48:18,135 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-11-06 22:48:18,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 476 events. 263/476 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1973 event pairs, 30 based on Foata normal form. 3/392 useless extension candidates. Maximal degree in co-relation 1213. Up to 343 conditions per place. [2023-11-06 22:48:18,140 INFO L140 encePairwiseOnDemand]: 425/432 looper letters, 71 selfloop transitions, 9 changer transitions 2/83 dead transitions. [2023-11-06 22:48:18,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 718 flow [2023-11-06 22:48:18,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:48:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:48:18,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 914 transitions. [2023-11-06 22:48:18,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42314814814814816 [2023-11-06 22:48:18,145 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 914 transitions. [2023-11-06 22:48:18,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 914 transitions. [2023-11-06 22:48:18,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:18,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 914 transitions. [2023-11-06 22:48:18,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 182.8) internal successors, (914), 5 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:18,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:18,153 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:18,153 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 505 flow. Second operand 5 states and 914 transitions. [2023-11-06 22:48:18,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 718 flow [2023-11-06 22:48:18,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 83 transitions, 516 flow, removed 71 selfloop flow, removed 18 redundant places. [2023-11-06 22:48:18,158 INFO L231 Difference]: Finished difference. Result has 61 places, 70 transitions, 362 flow [2023-11-06 22:48:18,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=61, PETRI_TRANSITIONS=70} [2023-11-06 22:48:18,159 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 21 predicate places. [2023-11-06 22:48:18,159 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 70 transitions, 362 flow [2023-11-06 22:48:18,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:18,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:18,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:18,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:18,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:48:18,375 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:48:18,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:18,375 INFO L85 PathProgramCache]: Analyzing trace with hash 915859254, now seen corresponding path program 2 times [2023-11-06 22:48:18,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:48:18,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426541472] [2023-11-06 22:48:18,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:48:18,376 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 [2023-11-06 22:48:18,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:48:18,378 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:48:18,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-06 22:48:18,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:48:18,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:18,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:48:18,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:18,597 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 9 [2023-11-06 22:48:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:18,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:48:18,691 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:48:18,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426541472] [2023-11-06 22:48:18,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426541472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:48:18,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:48:18,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:48:18,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863286610] [2023-11-06 22:48:18,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:18,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:48:18,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:48:18,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:48:18,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:48:18,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 432 [2023-11-06 22:48:18,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 70 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 178.8) internal successors, (894), 5 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:18,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:18,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 432 [2023-11-06 22:48:18,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:19,384 INFO L124 PetriNetUnfolderBase]: 260/479 cut-off events. [2023-11-06 22:48:19,384 INFO L125 PetriNetUnfolderBase]: For 177/186 co-relation queries the response was YES. [2023-11-06 22:48:19,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1480 conditions, 479 events. 260/479 cut-off events. For 177/186 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2003 event pairs, 24 based on Foata normal form. 9/413 useless extension candidates. Maximal degree in co-relation 1464. Up to 343 conditions per place. [2023-11-06 22:48:19,389 INFO L140 encePairwiseOnDemand]: 425/432 looper letters, 70 selfloop transitions, 9 changer transitions 2/82 dead transitions. [2023-11-06 22:48:19,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 82 transitions, 558 flow [2023-11-06 22:48:19,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:48:19,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:48:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 917 transitions. [2023-11-06 22:48:19,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42453703703703705 [2023-11-06 22:48:19,394 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 917 transitions. [2023-11-06 22:48:19,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 917 transitions. [2023-11-06 22:48:19,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:19,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 917 transitions. [2023-11-06 22:48:19,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 183.4) internal successors, (917), 5 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:19,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:19,402 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:19,402 INFO L175 Difference]: Start difference. First operand has 61 places, 70 transitions, 362 flow. Second operand 5 states and 917 transitions. [2023-11-06 22:48:19,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 82 transitions, 558 flow [2023-11-06 22:48:19,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 82 transitions, 552 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 22:48:19,407 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 393 flow [2023-11-06 22:48:19,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=393, PETRI_PLACES=66, PETRI_TRANSITIONS=71} [2023-11-06 22:48:19,410 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 26 predicate places. [2023-11-06 22:48:19,410 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 393 flow [2023-11-06 22:48:19,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.8) internal successors, (894), 5 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:19,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:19,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:19,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:19,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:48:19,627 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:48:19,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:19,628 INFO L85 PathProgramCache]: Analyzing trace with hash -333906862, now seen corresponding path program 3 times [2023-11-06 22:48:19,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:48:19,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160575289] [2023-11-06 22:48:19,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:48:19,629 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 [2023-11-06 22:48:19,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:48:19,630 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:48:19,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-06 22:48:19,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:48:19,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:19,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:48:19,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:19,821 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 9 [2023-11-06 22:48:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:19,966 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:48:19,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:48:19,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160575289] [2023-11-06 22:48:19,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160575289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:48:19,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:48:19,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:48:19,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183398931] [2023-11-06 22:48:19,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:19,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:48:19,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:48:19,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:48:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:48:21,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:48:23,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:48:26,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:48:26,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 432 [2023-11-06 22:48:26,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 393 flow. Second operand has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:26,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:26,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 432 [2023-11-06 22:48:26,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:26,390 INFO L124 PetriNetUnfolderBase]: 266/497 cut-off events. [2023-11-06 22:48:26,390 INFO L125 PetriNetUnfolderBase]: For 447/462 co-relation queries the response was YES. [2023-11-06 22:48:26,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1681 conditions, 497 events. 266/497 cut-off events. For 447/462 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2141 event pairs, 24 based on Foata normal form. 12/440 useless extension candidates. Maximal degree in co-relation 1662. Up to 343 conditions per place. [2023-11-06 22:48:26,395 INFO L140 encePairwiseOnDemand]: 425/432 looper letters, 71 selfloop transitions, 11 changer transitions 2/85 dead transitions. [2023-11-06 22:48:26,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 85 transitions, 605 flow [2023-11-06 22:48:26,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:48:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:48:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1089 transitions. [2023-11-06 22:48:26,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201388888888889 [2023-11-06 22:48:26,400 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1089 transitions. [2023-11-06 22:48:26,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1089 transitions. [2023-11-06 22:48:26,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:26,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1089 transitions. [2023-11-06 22:48:26,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.5) internal successors, (1089), 6 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:26,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 432.0) internal successors, (3024), 7 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:26,409 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 432.0) internal successors, (3024), 7 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:26,409 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 393 flow. Second operand 6 states and 1089 transitions. [2023-11-06 22:48:26,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 85 transitions, 605 flow [2023-11-06 22:48:26,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 85 transitions, 578 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-06 22:48:26,414 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 419 flow [2023-11-06 22:48:26,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=419, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2023-11-06 22:48:26,415 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 30 predicate places. [2023-11-06 22:48:26,416 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 419 flow [2023-11-06 22:48:26,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:26,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:26,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:26,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:26,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:48:26,628 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:48:26,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:26,629 INFO L85 PathProgramCache]: Analyzing trace with hash 610918707, now seen corresponding path program 1 times [2023-11-06 22:48:26,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:48:26,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160694761] [2023-11-06 22:48:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:26,629 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 [2023-11-06 22:48:26,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:48:26,633 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:48:26,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-06 22:48:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:26,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:48:26,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:26,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:27,056 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:48:27,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160694761] [2023-11-06 22:48:27,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160694761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:27,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:48:27,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 22:48:27,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182699118] [2023-11-06 22:48:27,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:27,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:48:27,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:48:27,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:48:27,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:48:27,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 432 [2023-11-06 22:48:27,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 419 flow. Second operand has 10 states, 10 states have (on average 174.4) internal successors, (1744), 10 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:27,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:27,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 432 [2023-11-06 22:48:27,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:29,148 INFO L124 PetriNetUnfolderBase]: 524/941 cut-off events. [2023-11-06 22:48:29,149 INFO L125 PetriNetUnfolderBase]: For 1110/1110 co-relation queries the response was YES. [2023-11-06 22:48:29,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3174 conditions, 941 events. 524/941 cut-off events. For 1110/1110 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4352 event pairs, 108 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 3153. Up to 486 conditions per place. [2023-11-06 22:48:29,160 INFO L140 encePairwiseOnDemand]: 426/432 looper letters, 100 selfloop transitions, 28 changer transitions 0/128 dead transitions. [2023-11-06 22:48:29,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 128 transitions, 912 flow [2023-11-06 22:48:29,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:48:29,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:48:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1964 transitions. [2023-11-06 22:48:29,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132996632996633 [2023-11-06 22:48:29,165 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1964 transitions. [2023-11-06 22:48:29,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1964 transitions. [2023-11-06 22:48:29,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:29,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1964 transitions. [2023-11-06 22:48:29,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 178.54545454545453) internal successors, (1964), 11 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:29,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 432.0) internal successors, (5184), 12 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:29,178 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 432.0) internal successors, (5184), 12 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:29,178 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 419 flow. Second operand 11 states and 1964 transitions. [2023-11-06 22:48:29,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 128 transitions, 912 flow [2023-11-06 22:48:29,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 128 transitions, 847 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-11-06 22:48:29,186 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 605 flow [2023-11-06 22:48:29,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=605, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2023-11-06 22:48:29,187 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 40 predicate places. [2023-11-06 22:48:29,187 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 605 flow [2023-11-06 22:48:29,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 174.4) internal successors, (1744), 10 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:29,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:29,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:29,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:29,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:48:29,400 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:48:29,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:29,401 INFO L85 PathProgramCache]: Analyzing trace with hash 169951281, now seen corresponding path program 2 times [2023-11-06 22:48:29,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:48:29,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767415571] [2023-11-06 22:48:29,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:48:29,401 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 [2023-11-06 22:48:29,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:48:29,403 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:48:29,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-06 22:48:29,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:48:29,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:29,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:48:29,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:29,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:29,761 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:48:29,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767415571] [2023-11-06 22:48:29,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767415571] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:29,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:48:29,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-06 22:48:29,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303155070] [2023-11-06 22:48:29,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:29,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:48:29,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:48:29,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:48:29,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:48:30,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 432 [2023-11-06 22:48:30,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 605 flow. Second operand has 9 states, 9 states have (on average 174.44444444444446) internal successors, (1570), 9 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:30,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:30,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 432 [2023-11-06 22:48:30,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:30,903 INFO L124 PetriNetUnfolderBase]: 557/1040 cut-off events. [2023-11-06 22:48:30,904 INFO L125 PetriNetUnfolderBase]: For 1326/1326 co-relation queries the response was YES. [2023-11-06 22:48:30,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4010 conditions, 1040 events. 557/1040 cut-off events. For 1326/1326 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5169 event pairs, 153 based on Foata normal form. 0/920 useless extension candidates. Maximal degree in co-relation 3987. Up to 489 conditions per place. [2023-11-06 22:48:30,914 INFO L140 encePairwiseOnDemand]: 426/432 looper letters, 112 selfloop transitions, 24 changer transitions 0/136 dead transitions. [2023-11-06 22:48:30,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 136 transitions, 1038 flow [2023-11-06 22:48:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:48:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:48:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1608 transitions. [2023-11-06 22:48:30,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41358024691358025 [2023-11-06 22:48:30,919 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1608 transitions. [2023-11-06 22:48:30,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1608 transitions. [2023-11-06 22:48:30,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:30,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1608 transitions. [2023-11-06 22:48:30,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 178.66666666666666) internal successors, (1608), 9 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:30,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 432.0) internal successors, (4320), 10 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:30,931 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 432.0) internal successors, (4320), 10 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:30,931 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 605 flow. Second operand 9 states and 1608 transitions. [2023-11-06 22:48:30,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 136 transitions, 1038 flow [2023-11-06 22:48:30,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 136 transitions, 980 flow, removed 29 selfloop flow, removed 0 redundant places. [2023-11-06 22:48:30,944 INFO L231 Difference]: Finished difference. Result has 94 places, 102 transitions, 709 flow [2023-11-06 22:48:30,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=709, PETRI_PLACES=94, PETRI_TRANSITIONS=102} [2023-11-06 22:48:30,945 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 54 predicate places. [2023-11-06 22:48:30,945 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 102 transitions, 709 flow [2023-11-06 22:48:30,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 174.44444444444446) internal successors, (1570), 9 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:30,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:30,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:30,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:31,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:48:31,158 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:48:31,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:31,159 INFO L85 PathProgramCache]: Analyzing trace with hash 912835336, now seen corresponding path program 1 times [2023-11-06 22:48:31,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:48:31,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115497634] [2023-11-06 22:48:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:31,159 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 [2023-11-06 22:48:31,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:48:31,161 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:48:31,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-06 22:48:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:31,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:48:31,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:31,380 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 22:48:31,555 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 29 [2023-11-06 22:48:31,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 19 [2023-11-06 22:48:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:31,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:33,982 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 149 [2023-11-06 22:48:33,988 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 147 [2023-11-06 22:48:35,150 INFO L322 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-11-06 22:48:35,150 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 172 treesize of output 115 [2023-11-06 22:48:35,162 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2023-11-06 22:48:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:35,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:48:35,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115497634] [2023-11-06 22:48:35,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115497634] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:35,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:48:35,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-11-06 22:48:35,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587363022] [2023-11-06 22:48:35,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:35,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:48:35,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:48:35,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:48:35,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=240, Unknown=2, NotChecked=0, Total=306 [2023-11-06 22:48:38,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:48:41,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 432 [2023-11-06 22:48:41,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 102 transitions, 709 flow. Second operand has 18 states, 18 states have (on average 122.77777777777777) internal successors, (2210), 18 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:41,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:41,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 432 [2023-11-06 22:48:41,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:45,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:48:47,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:48:50,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:48:52,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:48:54,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:48:56,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:48:59,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:49:02,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:49:04,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:49:08,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:49:10,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:49:12,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:49:14,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:49:17,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:49:21,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:49:26,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:49:28,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:49:30,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:49:32,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:49:34,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:49:36,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:49:38,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:49:40,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:49:42,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:49:44,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:49:46,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:49:49,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:49:51,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:49:53,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:49:55,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:49:57,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:49:59,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:50:00,325 INFO L124 PetriNetUnfolderBase]: 1211/2237 cut-off events. [2023-11-06 22:50:00,325 INFO L125 PetriNetUnfolderBase]: For 6615/6615 co-relation queries the response was YES. [2023-11-06 22:50:00,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9231 conditions, 2237 events. 1211/2237 cut-off events. For 6615/6615 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13545 event pairs, 27 based on Foata normal form. 45/2276 useless extension candidates. Maximal degree in co-relation 9201. Up to 603 conditions per place. [2023-11-06 22:50:00,343 INFO L140 encePairwiseOnDemand]: 421/432 looper letters, 118 selfloop transitions, 102 changer transitions 24/244 dead transitions. [2023-11-06 22:50:00,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 244 transitions, 1883 flow [2023-11-06 22:50:00,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:50:00,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:50:00,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3071 transitions. [2023-11-06 22:50:00,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29619984567901236 [2023-11-06 22:50:00,350 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3071 transitions. [2023-11-06 22:50:00,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3071 transitions. [2023-11-06 22:50:00,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:50:00,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3071 transitions. [2023-11-06 22:50:00,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 127.95833333333333) internal successors, (3071), 24 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:00,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 432.0) internal successors, (10800), 25 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:00,369 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 432.0) internal successors, (10800), 25 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:00,369 INFO L175 Difference]: Start difference. First operand has 94 places, 102 transitions, 709 flow. Second operand 24 states and 3071 transitions. [2023-11-06 22:50:00,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 244 transitions, 1883 flow [2023-11-06 22:50:00,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 244 transitions, 1739 flow, removed 49 selfloop flow, removed 2 redundant places. [2023-11-06 22:50:00,413 INFO L231 Difference]: Finished difference. Result has 129 places, 152 transitions, 1311 flow [2023-11-06 22:50:00,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1311, PETRI_PLACES=129, PETRI_TRANSITIONS=152} [2023-11-06 22:50:00,414 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 89 predicate places. [2023-11-06 22:50:00,414 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 152 transitions, 1311 flow [2023-11-06 22:50:00,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 122.77777777777777) internal successors, (2210), 18 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:00,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:50:00,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:00,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:00,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:50:00,628 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:50:00,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:00,628 INFO L85 PathProgramCache]: Analyzing trace with hash -140589399, now seen corresponding path program 3 times [2023-11-06 22:50:00,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:50:00,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254111319] [2023-11-06 22:50:00,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:50:00,629 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 [2023-11-06 22:50:00,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:50:00,630 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:50:00,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-06 22:50:00,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:50:00,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:50:00,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:50:00,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:50:00,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:50:01,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:50:01,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254111319] [2023-11-06 22:50:01,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254111319] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:50:01,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:50:01,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-06 22:50:01,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247202586] [2023-11-06 22:50:01,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:01,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:50:01,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:50:01,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:50:01,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:50:01,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 432 [2023-11-06 22:50:01,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 152 transitions, 1311 flow. Second operand has 9 states, 9 states have (on average 174.44444444444446) internal successors, (1570), 9 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:01,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:50:01,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 432 [2023-11-06 22:50:01,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:50:03,486 INFO L124 PetriNetUnfolderBase]: 1202/2243 cut-off events. [2023-11-06 22:50:03,486 INFO L125 PetriNetUnfolderBase]: For 11134/11134 co-relation queries the response was YES. [2023-11-06 22:50:03,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11097 conditions, 2243 events. 1202/2243 cut-off events. For 11134/11134 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 13632 event pairs, 360 based on Foata normal form. 36/2279 useless extension candidates. Maximal degree in co-relation 11052. Up to 1569 conditions per place. [2023-11-06 22:50:03,518 INFO L140 encePairwiseOnDemand]: 426/432 looper letters, 162 selfloop transitions, 33 changer transitions 0/195 dead transitions. [2023-11-06 22:50:03,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 195 transitions, 1945 flow [2023-11-06 22:50:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:50:03,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:50:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1790 transitions. [2023-11-06 22:50:03,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41435185185185186 [2023-11-06 22:50:03,523 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1790 transitions. [2023-11-06 22:50:03,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1790 transitions. [2023-11-06 22:50:03,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:50:03,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1790 transitions. [2023-11-06 22:50:03,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:03,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 432.0) internal successors, (4752), 11 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:03,549 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 432.0) internal successors, (4752), 11 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:03,550 INFO L175 Difference]: Start difference. First operand has 129 places, 152 transitions, 1311 flow. Second operand 10 states and 1790 transitions. [2023-11-06 22:50:03,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 195 transitions, 1945 flow [2023-11-06 22:50:03,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 195 transitions, 1748 flow, removed 69 selfloop flow, removed 6 redundant places. [2023-11-06 22:50:03,626 INFO L231 Difference]: Finished difference. Result has 135 places, 163 transitions, 1381 flow [2023-11-06 22:50:03,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1381, PETRI_PLACES=135, PETRI_TRANSITIONS=163} [2023-11-06 22:50:03,628 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 95 predicate places. [2023-11-06 22:50:03,628 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 163 transitions, 1381 flow [2023-11-06 22:50:03,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 174.44444444444446) internal successors, (1570), 9 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:03,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:50:03,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:03,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:03,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:50:03,842 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-06 22:50:03,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:03,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1170438302, now seen corresponding path program 2 times [2023-11-06 22:50:03,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:50:03,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410104979] [2023-11-06 22:50:03,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:50:03,843 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 [2023-11-06 22:50:03,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:50:03,844 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:50:03,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7bf98a0-035c-4f7f-855e-74c68f24b03a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-06 22:50:03,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:50:03,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:50:04,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:50:04,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:04,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 19 [2023-11-06 22:50:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:50:04,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:06,529 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 149 [2023-11-06 22:50:06,546 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 147 [2023-11-06 22:50:07,596 INFO L322 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-11-06 22:50:07,597 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 169 treesize of output 113 [2023-11-06 22:50:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:50:10,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:50:10,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410104979] [2023-11-06 22:50:10,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410104979] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:50:10,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:50:10,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-06 22:50:10,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511567919] [2023-11-06 22:50:10,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:10,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:50:10,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:50:10,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:50:10,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=124, Unknown=1, NotChecked=0, Total=182 [2023-11-06 22:50:12,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:50:14,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:50:16,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:50:18,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:50:20,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:50:22,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:50:24,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:50:26,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:50:28,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:50:30,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0]