./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:12:39,832 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:12:39,954 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:12:39,967 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:12:39,968 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:12:40,024 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:12:40,026 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:12:40,026 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:12:40,028 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:12:40,034 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:12:40,036 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:12:40,036 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:12:40,037 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:12:40,039 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:12:40,040 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:12:40,040 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:12:40,041 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:12:40,041 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:12:40,042 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:12:40,042 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:12:40,043 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:12:40,043 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:12:40,044 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:12:40,044 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:12:40,045 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:12:40,045 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:12:40,047 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:12:40,047 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:12:40,048 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:12:40,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:12:40,050 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:12:40,050 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:12:40,050 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:12:40,051 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:12:40,051 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:12:40,051 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:12:40,051 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:12:40,052 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:12:40,052 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_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 [2023-11-06 22:12:40,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:12:40,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:12:40,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:12:40,411 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:12:40,412 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:12:40,413 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-06 22:12:43,562 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:12:43,818 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:12:43,819 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-06 22:12:43,830 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/data/8a1535849/215be412abcf48de9c86f31c2b26f6ef/FLAGff6f0241b [2023-11-06 22:12:43,862 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/data/8a1535849/215be412abcf48de9c86f31c2b26f6ef [2023-11-06 22:12:43,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:12:43,867 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:12:43,868 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:12:43,868 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:12:43,878 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:12:43,882 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:12:43" (1/1) ... [2023-11-06 22:12:43,884 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e2929c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:43, skipping insertion in model container [2023-11-06 22:12:43,884 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:12:43" (1/1) ... [2023-11-06 22:12:43,928 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:12:44,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:12:44,244 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 22:12:44,245 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2dc8b3a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:44, skipping insertion in model container [2023-11-06 22:12:44,245 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:12:44,246 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 22:12:44,248 INFO L158 Benchmark]: Toolchain (without parser) took 380.48ms. Allocated memory is still 144.7MB. Free memory was 100.5MB in the beginning and 90.7MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:12:44,249 INFO L158 Benchmark]: CDTParser took 0.72ms. Allocated memory is still 102.8MB. Free memory is still 55.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:12:44,249 INFO L158 Benchmark]: CACSL2BoogieTranslator took 377.63ms. Allocated memory is still 144.7MB. Free memory was 100.5MB in the beginning and 90.7MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:12:44,251 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.72ms. Allocated memory is still 102.8MB. Free memory is still 55.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 377.63ms. Allocated memory is still 144.7MB. Free memory was 100.5MB in the beginning and 90.7MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 112]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:12:47,029 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:12:47,114 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 22:12:47,121 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:12:47,121 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:12:47,182 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:12:47,183 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:12:47,184 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:12:47,185 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:12:47,186 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:12:47,187 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:12:47,188 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:12:47,189 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:12:47,189 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:12:47,190 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:12:47,191 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:12:47,192 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:12:47,192 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:12:47,193 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:12:47,194 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:12:47,194 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:12:47,195 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:12:47,195 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:12:47,196 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:12:47,197 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:12:47,197 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:12:47,198 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:12:47,198 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:12:47,198 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:12:47,199 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:12:47,199 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:12:47,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:12:47,200 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:12:47,201 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:12:47,201 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:12:47,201 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:12:47,201 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:12:47,201 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:12:47,202 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:12:47,202 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:12:47,202 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:12:47,203 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_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 [2023-11-06 22:12:47,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:12:47,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:12:47,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:12:47,726 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:12:47,726 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:12:47,728 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-06 22:12:50,975 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:12:51,316 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:12:51,323 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-06 22:12:51,338 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/data/f5a7bcd06/b116b4fccb1b440397da35fb67308811/FLAG1e6de278a [2023-11-06 22:12:51,361 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/data/f5a7bcd06/b116b4fccb1b440397da35fb67308811 [2023-11-06 22:12:51,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:12:51,366 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:12:51,368 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:12:51,368 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:12:51,376 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:12:51,377 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:12:51" (1/1) ... [2023-11-06 22:12:51,378 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b6387a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:51, skipping insertion in model container [2023-11-06 22:12:51,379 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:12:51" (1/1) ... [2023-11-06 22:12:51,425 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:12:51,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:12:51,799 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:12:51,805 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:12:51,826 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:12:51,833 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:12:51,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:12:51,909 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:12:51,910 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:51 WrapperNode [2023-11-06 22:12:51,910 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:12:51,912 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:12:51,912 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:12:51,912 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:12:51,921 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:51" (1/1) ... [2023-11-06 22:12:51,949 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:51" (1/1) ... [2023-11-06 22:12:51,991 INFO L138 Inliner]: procedures = 25, calls = 42, calls flagged for inlining = 18, calls inlined = 32, statements flattened = 271 [2023-11-06 22:12:51,991 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:12:51,992 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:12:51,992 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:12:51,992 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:12:52,003 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:51" (1/1) ... [2023-11-06 22:12:52,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:51" (1/1) ... [2023-11-06 22:12:52,011 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:51" (1/1) ... [2023-11-06 22:12:52,011 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:51" (1/1) ... [2023-11-06 22:12:52,037 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:51" (1/1) ... [2023-11-06 22:12:52,058 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:51" (1/1) ... [2023-11-06 22:12:52,061 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:51" (1/1) ... [2023-11-06 22:12:52,070 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:51" (1/1) ... [2023-11-06 22:12:52,075 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:12:52,080 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:12:52,081 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:12:52,081 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:12:52,083 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:51" (1/1) ... [2023-11-06 22:12:52,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:12:52,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:52,127 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:12:52,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:12:52,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:12:52,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:12:52,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:12:52,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:12:52,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:12:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:12:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:12:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:12:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 22:12:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:12:52,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:12:52,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:12:52,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:12:52,189 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 22:12:52,338 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:12:52,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:12:53,238 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:12:53,250 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:12:53,251 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:12:53,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:12:53 BoogieIcfgContainer [2023-11-06 22:12:53,254 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:12:53,257 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:12:53,257 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:12:53,260 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:12:53,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:12:51" (1/3) ... [2023-11-06 22:12:53,262 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687ab934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:12:53, skipping insertion in model container [2023-11-06 22:12:53,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:51" (2/3) ... [2023-11-06 22:12:53,262 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687ab934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:12:53, skipping insertion in model container [2023-11-06 22:12:53,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:12:53" (3/3) ... [2023-11-06 22:12:53,264 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2023-11-06 22:12:53,285 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:12:53,286 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-11-06 22:12:53,286 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:12:53,476 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:12:53,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 393 places, 414 transitions, 842 flow [2023-11-06 22:12:53,866 INFO L124 PetriNetUnfolderBase]: 28/412 cut-off events. [2023-11-06 22:12:53,867 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:12:53,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 412 events. 28/412 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1029 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 279. Up to 2 conditions per place. [2023-11-06 22:12:53,885 INFO L82 GeneralOperation]: Start removeDead. Operand has 393 places, 414 transitions, 842 flow [2023-11-06 22:12:53,902 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 407 transitions, 826 flow [2023-11-06 22:12:53,907 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:12:53,924 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 386 places, 407 transitions, 826 flow [2023-11-06 22:12:53,929 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 386 places, 407 transitions, 826 flow [2023-11-06 22:12:53,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 407 transitions, 826 flow [2023-11-06 22:12:54,060 INFO L124 PetriNetUnfolderBase]: 28/407 cut-off events. [2023-11-06 22:12:54,060 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:12:54,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 407 events. 28/407 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1029 event pairs, 0 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 279. Up to 2 conditions per place. [2023-11-06 22:12:54,094 INFO L119 LiptonReduction]: Number of co-enabled transitions 40920 [2023-11-06 22:13:43,951 INFO L134 LiptonReduction]: Checked pairs total: 38180 [2023-11-06 22:13:43,952 INFO L136 LiptonReduction]: Total number of compositions: 526 [2023-11-06 22:13:43,967 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:13:43,974 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;@6a9c352a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:13:43,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-11-06 22:13:43,978 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:13:43,978 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:13:43,979 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:13:43,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:43,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:13:43,980 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:13:43,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:43,986 INFO L85 PathProgramCache]: Analyzing trace with hash 56516, now seen corresponding path program 1 times [2023-11-06 22:13:43,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:13:44,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514148622] [2023-11-06 22:13:44,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:44,001 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 22:13:44,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:13:44,006 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:44,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:44,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:13:44,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:44,298 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 22:13:44,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:44,320 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 22:13:44,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:44,346 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 22:13:44,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:44,356 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 22:13:44,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:44,381 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 22:13:44,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:44,410 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 22:13:44,442 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 22:13:44,442 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:13:44,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:13:44,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514148622] [2023-11-06 22:13:44,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514148622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:44,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:44,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:13:44,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827083857] [2023-11-06 22:13:44,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:44,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:44,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:13:44,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:44,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:44,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 378 out of 940 [2023-11-06 22:13:44,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 0 states have call successors, (0), 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 22:13:44,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:44,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 378 of 940 [2023-11-06 22:13:44,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:45,435 INFO L124 PetriNetUnfolderBase]: 233/379 cut-off events. [2023-11-06 22:13:45,436 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-06 22:13:45,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 379 events. 233/379 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 1330 event pairs, 161 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 676. Up to 378 conditions per place. [2023-11-06 22:13:45,441 INFO L140 encePairwiseOnDemand]: 925/940 looper letters, 32 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2023-11-06 22:13:45,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 160 flow [2023-11-06 22:13:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:45,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1181 transitions. [2023-11-06 22:13:45,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4187943262411348 [2023-11-06 22:13:45,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1181 transitions. [2023-11-06 22:13:45,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1181 transitions. [2023-11-06 22:13:45,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:45,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1181 transitions. [2023-11-06 22:13:45,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 393.6666666666667) internal successors, (1181), 3 states have internal predecessors, (1181), 0 states have call successors, (0), 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 22:13:45,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 940.0) internal successors, (3760), 4 states have internal predecessors, (3760), 0 states have call successors, (0), 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 22:13:45,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 940.0) internal successors, (3760), 4 states have internal predecessors, (3760), 0 states have call successors, (0), 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 22:13:45,494 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 94 flow. Second operand 3 states and 1181 transitions. [2023-11-06 22:13:45,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 37 transitions, 160 flow [2023-11-06 22:13:45,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 152 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:13:45,500 INFO L231 Difference]: Finished difference. Result has 34 places, 36 transitions, 101 flow [2023-11-06 22:13:45,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=34, PETRI_TRANSITIONS=36} [2023-11-06 22:13:45,505 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -10 predicate places. [2023-11-06 22:13:45,506 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 36 transitions, 101 flow [2023-11-06 22:13:45,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 0 states have call successors, (0), 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 22:13:45,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:45,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:13:45,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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)] Ended with exit code 0 [2023-11-06 22:13:45,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:45,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:13:45,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:45,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1756059, now seen corresponding path program 1 times [2023-11-06 22:13:45,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:13:45,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146786349] [2023-11-06 22:13:45,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:45,733 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 22:13:45,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:13:45,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:45,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:45,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:13:45,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:45,874 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 22:13:45,874 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 22:13:45,900 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:13:45,901 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 22:13:45,971 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 22:13:45,971 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:13:45,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:13:45,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146786349] [2023-11-06 22:13:45,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146786349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:45,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:45,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:13:45,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943772667] [2023-11-06 22:13:45,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:45,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:45,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:13:45,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:45,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:46,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 376 out of 940 [2023-11-06 22:13:46,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 36 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 377.0) internal successors, (1131), 3 states have internal predecessors, (1131), 0 states have call successors, (0), 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 22:13:46,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:46,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 376 of 940 [2023-11-06 22:13:46,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:46,630 INFO L124 PetriNetUnfolderBase]: 180/301 cut-off events. [2023-11-06 22:13:46,631 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:13:46,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 301 events. 180/301 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 982 event pairs, 123 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 589. Up to 301 conditions per place. [2023-11-06 22:13:46,636 INFO L140 encePairwiseOnDemand]: 937/940 looper letters, 32 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-11-06 22:13:46,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 156 flow [2023-11-06 22:13:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1160 transitions. [2023-11-06 22:13:46,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41134751773049644 [2023-11-06 22:13:46,643 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1160 transitions. [2023-11-06 22:13:46,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1160 transitions. [2023-11-06 22:13:46,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:46,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1160 transitions. [2023-11-06 22:13:46,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 386.6666666666667) internal successors, (1160), 3 states have internal predecessors, (1160), 0 states have call successors, (0), 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 22:13:46,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 940.0) internal successors, (3760), 4 states have internal predecessors, (3760), 0 states have call successors, (0), 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 22:13:46,663 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 940.0) internal successors, (3760), 4 states have internal predecessors, (3760), 0 states have call successors, (0), 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 22:13:46,663 INFO L175 Difference]: Start difference. First operand has 34 places, 36 transitions, 101 flow. Second operand 3 states and 1160 transitions. [2023-11-06 22:13:46,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 156 flow [2023-11-06 22:13:46,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:46,666 INFO L231 Difference]: Finished difference. Result has 33 places, 33 transitions, 88 flow [2023-11-06 22:13:46,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=33, PETRI_TRANSITIONS=33} [2023-11-06 22:13:46,667 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -11 predicate places. [2023-11-06 22:13:46,667 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 33 transitions, 88 flow [2023-11-06 22:13:46,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 377.0) internal successors, (1131), 3 states have internal predecessors, (1131), 0 states have call successors, (0), 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 22:13:46,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:46,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:13:46,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:46,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:46,882 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:13:46,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:46,883 INFO L85 PathProgramCache]: Analyzing trace with hash 56515, now seen corresponding path program 1 times [2023-11-06 22:13:46,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:13:46,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484947021] [2023-11-06 22:13:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:46,884 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 22:13:46,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:13:46,897 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:46,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:46,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:13:46,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:46,987 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 22:13:47,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:47,004 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 22:13:47,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:47,024 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 22:13:47,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:47,034 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 22:13:47,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:47,065 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 22:13:47,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:47,081 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 22:13:47,087 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 22:13:47,088 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:13:47,088 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:13:47,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484947021] [2023-11-06 22:13:47,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484947021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:47,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:47,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:13:47,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217382328] [2023-11-06 22:13:47,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:47,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:47,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:13:47,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:47,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:47,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 379 out of 940 [2023-11-06 22:13:47,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 33 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 379.6666666666667) internal successors, (1139), 3 states have internal predecessors, (1139), 0 states have call successors, (0), 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 22:13:47,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:47,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 379 of 940 [2023-11-06 22:13:47,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:47,733 INFO L124 PetriNetUnfolderBase]: 180/299 cut-off events. [2023-11-06 22:13:47,734 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:13:47,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 299 events. 180/299 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 962 event pairs, 123 based on Foata normal form. 2/122 useless extension candidates. Maximal degree in co-relation 610. Up to 296 conditions per place. [2023-11-06 22:13:47,737 INFO L140 encePairwiseOnDemand]: 936/940 looper letters, 27 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-11-06 22:13:47,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 150 flow [2023-11-06 22:13:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1167 transitions. [2023-11-06 22:13:47,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41382978723404257 [2023-11-06 22:13:47,743 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1167 transitions. [2023-11-06 22:13:47,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1167 transitions. [2023-11-06 22:13:47,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:47,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1167 transitions. [2023-11-06 22:13:47,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 389.0) internal successors, (1167), 3 states have internal predecessors, (1167), 0 states have call successors, (0), 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 22:13:47,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 940.0) internal successors, (3760), 4 states have internal predecessors, (3760), 0 states have call successors, (0), 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 22:13:47,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 940.0) internal successors, (3760), 4 states have internal predecessors, (3760), 0 states have call successors, (0), 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 22:13:47,761 INFO L175 Difference]: Start difference. First operand has 33 places, 33 transitions, 88 flow. Second operand 3 states and 1167 transitions. [2023-11-06 22:13:47,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 150 flow [2023-11-06 22:13:47,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 147 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:47,764 INFO L231 Difference]: Finished difference. Result has 33 places, 32 transitions, 93 flow [2023-11-06 22:13:47,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=33, PETRI_TRANSITIONS=32} [2023-11-06 22:13:47,767 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -11 predicate places. [2023-11-06 22:13:47,767 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 32 transitions, 93 flow [2023-11-06 22:13:47,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 379.6666666666667) internal successors, (1139), 3 states have internal predecessors, (1139), 0 states have call successors, (0), 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 22:13:47,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:47,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:13:47,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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)] Ended with exit code 0 [2023-11-06 22:13:47,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:47,982 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:13:47,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:47,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1756061, now seen corresponding path program 1 times [2023-11-06 22:13:47,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:13:47,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74235143] [2023-11-06 22:13:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:47,983 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 22:13:47,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:13:47,989 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:47,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:48,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:13:48,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:48,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:48,128 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:13:48,128 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 9 [2023-11-06 22:13:48,138 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 22:13:48,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:48,165 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 22:13:48,246 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 22:13:48,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:48,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:13:48,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74235143] [2023-11-06 22:13:48,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74235143] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:48,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:13:48,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-11-06 22:13:48,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38139231] [2023-11-06 22:13:48,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:48,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:13:48,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:13:48,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:13:48,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:13:49,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 940 [2023-11-06 22:13:49,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 369.75) internal successors, (1479), 4 states have internal predecessors, (1479), 0 states have call successors, (0), 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 22:13:49,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:49,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 940 [2023-11-06 22:13:49,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:49,515 INFO L124 PetriNetUnfolderBase]: 127/221 cut-off events. [2023-11-06 22:13:49,515 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:13:49,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 221 events. 127/221 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 670 event pairs, 85 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 453. Up to 221 conditions per place. [2023-11-06 22:13:49,517 INFO L140 encePairwiseOnDemand]: 937/940 looper letters, 28 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-06 22:13:49,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 29 transitions, 137 flow [2023-11-06 22:13:49,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:49,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:49,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1136 transitions. [2023-11-06 22:13:49,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40283687943262414 [2023-11-06 22:13:49,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1136 transitions. [2023-11-06 22:13:49,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1136 transitions. [2023-11-06 22:13:49,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:49,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1136 transitions. [2023-11-06 22:13:49,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 0 states have call successors, (0), 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 22:13:49,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 940.0) internal successors, (3760), 4 states have internal predecessors, (3760), 0 states have call successors, (0), 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 22:13:49,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 940.0) internal successors, (3760), 4 states have internal predecessors, (3760), 0 states have call successors, (0), 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 22:13:49,539 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 93 flow. Second operand 3 states and 1136 transitions. [2023-11-06 22:13:49,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 29 transitions, 137 flow [2023-11-06 22:13:49,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 131 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:13:49,541 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 75 flow [2023-11-06 22:13:49,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-11-06 22:13:49,542 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -13 predicate places. [2023-11-06 22:13:49,542 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 75 flow [2023-11-06 22:13:49,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 369.75) internal successors, (1479), 4 states have internal predecessors, (1479), 0 states have call successors, (0), 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 22:13:49,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:49,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:13:49,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:49,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:49,755 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:13:49,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:49,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1755874, now seen corresponding path program 1 times [2023-11-06 22:13:49,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:13:49,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677975819] [2023-11-06 22:13:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:49,756 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 22:13:49,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:13:49,758 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:49,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:49,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:13:49,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:49,855 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 22:13:49,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:49,868 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 22:13:49,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:49,894 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 22:13:49,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:49,911 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 22:13:49,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:49,925 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 22:13:49,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:49,934 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 22:13:50,001 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 22:13:50,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:50,258 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 22:13:50,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:13:50,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677975819] [2023-11-06 22:13:50,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677975819] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:50,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:13:50,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 22:13:50,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564243952] [2023-11-06 22:13:50,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:50,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:13:50,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:13:50,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:13:50,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:13:51,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 373 out of 940 [2023-11-06 22:13:51,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 75 flow. Second operand has 6 states, 6 states have (on average 374.0) internal successors, (2244), 6 states have internal predecessors, (2244), 0 states have call successors, (0), 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 22:13:51,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:51,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 373 of 940 [2023-11-06 22:13:51,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:52,644 INFO L124 PetriNetUnfolderBase]: 130/227 cut-off events. [2023-11-06 22:13:52,644 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:13:52,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 227 events. 130/227 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 711 event pairs, 85 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 469. Up to 224 conditions per place. [2023-11-06 22:13:52,646 INFO L140 encePairwiseOnDemand]: 936/940 looper letters, 26 selfloop transitions, 9 changer transitions 0/35 dead transitions. [2023-11-06 22:13:52,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 169 flow [2023-11-06 22:13:52,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:13:52,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:13:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2276 transitions. [2023-11-06 22:13:52,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40354609929078017 [2023-11-06 22:13:52,659 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2276 transitions. [2023-11-06 22:13:52,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2276 transitions. [2023-11-06 22:13:52,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:52,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2276 transitions. [2023-11-06 22:13:52,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 379.3333333333333) internal successors, (2276), 6 states have internal predecessors, (2276), 0 states have call successors, (0), 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 22:13:52,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 940.0) internal successors, (6580), 7 states have internal predecessors, (6580), 0 states have call successors, (0), 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 22:13:52,690 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 940.0) internal successors, (6580), 7 states have internal predecessors, (6580), 0 states have call successors, (0), 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 22:13:52,691 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 75 flow. Second operand 6 states and 2276 transitions. [2023-11-06 22:13:52,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 169 flow [2023-11-06 22:13:52,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:52,693 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 135 flow [2023-11-06 22:13:52,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=135, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2023-11-06 22:13:52,694 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2023-11-06 22:13:52,694 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 135 flow [2023-11-06 22:13:52,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 374.0) internal successors, (2244), 6 states have internal predecessors, (2244), 0 states have call successors, (0), 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 22:13:52,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:52,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:13:52,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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)] Ended with exit code 0 [2023-11-06 22:13:52,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:52,908 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:13:52,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:52,909 INFO L85 PathProgramCache]: Analyzing trace with hash 54529602, now seen corresponding path program 1 times [2023-11-06 22:13:52,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:13:52,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465667848] [2023-11-06 22:13:52,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:52,910 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 22:13:52,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:13:52,911 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:52,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:52,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:13:53,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:53,007 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 6 treesize of output 7 [2023-11-06 22:13:53,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:53,022 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 22:13:53,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:53,032 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 22:13:53,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:53,039 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 22:13:53,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:53,061 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 22:13:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:53,071 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 22:13:53,089 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 22:13:53,089 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:13:53,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:13:53,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465667848] [2023-11-06 22:13:53,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465667848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:53,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:53,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:13:53,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495443290] [2023-11-06 22:13:53,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:53,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:13:53,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:13:53,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:13:53,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:13:53,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 940 [2023-11-06 22:13:53,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 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 22:13:53,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:53,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 940 [2023-11-06 22:13:53,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:53,735 INFO L124 PetriNetUnfolderBase]: 93/164 cut-off events. [2023-11-06 22:13:53,735 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:13:53,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 164 events. 93/164 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 455 event pairs, 54 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 361. Up to 157 conditions per place. [2023-11-06 22:13:53,737 INFO L140 encePairwiseOnDemand]: 936/940 looper letters, 27 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2023-11-06 22:13:53,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 197 flow [2023-11-06 22:13:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:13:53,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:13:53,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1487 transitions. [2023-11-06 22:13:53,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39547872340425533 [2023-11-06 22:13:53,744 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1487 transitions. [2023-11-06 22:13:53,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1487 transitions. [2023-11-06 22:13:53,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:53,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1487 transitions. [2023-11-06 22:13:53,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 371.75) internal successors, (1487), 4 states have internal predecessors, (1487), 0 states have call successors, (0), 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 22:13:53,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 940.0) internal successors, (4700), 5 states have internal predecessors, (4700), 0 states have call successors, (0), 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 22:13:53,760 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 940.0) internal successors, (4700), 5 states have internal predecessors, (4700), 0 states have call successors, (0), 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 22:13:53,760 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 135 flow. Second operand 4 states and 1487 transitions. [2023-11-06 22:13:53,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 197 flow [2023-11-06 22:13:53,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 33 transitions, 176 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:53,762 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 122 flow [2023-11-06 22:13:53,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-06 22:13:53,763 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2023-11-06 22:13:53,764 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 122 flow [2023-11-06 22:13:53,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 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 22:13:53,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:53,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:13:53,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:53,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:53,975 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:13:53,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:53,976 INFO L85 PathProgramCache]: Analyzing trace with hash 54529603, now seen corresponding path program 1 times [2023-11-06 22:13:53,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:13:53,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414031366] [2023-11-06 22:13:53,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:53,976 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 22:13:53,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:13:53,977 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:53,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:54,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:13:54,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:54,065 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 22:13:54,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:54,077 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 22:13:54,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:54,100 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 22:13:54,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:54,112 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 22:13:54,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:54,125 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 22:13:54,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:54,137 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 22:13:54,223 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 22:13:54,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:13:54,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:13:54,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414031366] [2023-11-06 22:13:54,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414031366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:54,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:54,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:13:54,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716989004] [2023-11-06 22:13:54,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:54,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:13:54,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:13:54,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:13:54,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:13:54,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 374 out of 940 [2023-11-06 22:13:54,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 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 22:13:54,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:54,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 374 of 940 [2023-11-06 22:13:54,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:55,135 INFO L124 PetriNetUnfolderBase]: 167/292 cut-off events. [2023-11-06 22:13:55,135 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-06 22:13:55,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 292 events. 167/292 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1053 event pairs, 43 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 617. Up to 172 conditions per place. [2023-11-06 22:13:55,138 INFO L140 encePairwiseOnDemand]: 935/940 looper letters, 44 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2023-11-06 22:13:55,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 267 flow [2023-11-06 22:13:55,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:13:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:13:55,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1541 transitions. [2023-11-06 22:13:55,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098404255319149 [2023-11-06 22:13:55,146 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1541 transitions. [2023-11-06 22:13:55,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1541 transitions. [2023-11-06 22:13:55,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:55,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1541 transitions. [2023-11-06 22:13:55,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 385.25) internal successors, (1541), 4 states have internal predecessors, (1541), 0 states have call successors, (0), 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 22:13:55,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 940.0) internal successors, (4700), 5 states have internal predecessors, (4700), 0 states have call successors, (0), 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 22:13:55,162 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 940.0) internal successors, (4700), 5 states have internal predecessors, (4700), 0 states have call successors, (0), 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 22:13:55,162 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 122 flow. Second operand 4 states and 1541 transitions. [2023-11-06 22:13:55,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 267 flow [2023-11-06 22:13:55,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 52 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:13:55,165 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 148 flow [2023-11-06 22:13:55,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-11-06 22:13:55,166 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-11-06 22:13:55,166 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 148 flow [2023-11-06 22:13:55,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 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 22:13:55,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:55,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:13:55,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:55,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:55,378 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:13:55,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:55,379 INFO L85 PathProgramCache]: Analyzing trace with hash 54529838, now seen corresponding path program 1 times [2023-11-06 22:13:55,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:13:55,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078957983] [2023-11-06 22:13:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:55,379 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 22:13:55,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:13:55,380 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:55,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:55,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:13:55,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:55,470 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:13:55,470 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 22:13:55,507 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:13:55,507 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 22:13:55,527 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:13:55,527 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 22:13:55,577 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 22:13:55,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:13:55,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:13:55,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078957983] [2023-11-06 22:13:55,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078957983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:55,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:55,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:13:55,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043936968] [2023-11-06 22:13:55,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:55,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:55,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:13:55,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:55,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:55,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 376 out of 940 [2023-11-06 22:13:55,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 377.3333333333333) internal successors, (1132), 3 states have internal predecessors, (1132), 0 states have call successors, (0), 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 22:13:55,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:55,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 376 of 940 [2023-11-06 22:13:55,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:56,135 INFO L124 PetriNetUnfolderBase]: 150/260 cut-off events. [2023-11-06 22:13:56,136 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-11-06 22:13:56,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 260 events. 150/260 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 850 event pairs, 94 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 621. Up to 260 conditions per place. [2023-11-06 22:13:56,139 INFO L140 encePairwiseOnDemand]: 937/940 looper letters, 32 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-11-06 22:13:56,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 210 flow [2023-11-06 22:13:56,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:56,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:56,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1153 transitions. [2023-11-06 22:13:56,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40886524822695036 [2023-11-06 22:13:56,146 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1153 transitions. [2023-11-06 22:13:56,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1153 transitions. [2023-11-06 22:13:56,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:56,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1153 transitions. [2023-11-06 22:13:56,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 384.3333333333333) internal successors, (1153), 3 states have internal predecessors, (1153), 0 states have call successors, (0), 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 22:13:56,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 940.0) internal successors, (3760), 4 states have internal predecessors, (3760), 0 states have call successors, (0), 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 22:13:56,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 940.0) internal successors, (3760), 4 states have internal predecessors, (3760), 0 states have call successors, (0), 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 22:13:56,160 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 148 flow. Second operand 3 states and 1153 transitions. [2023-11-06 22:13:56,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 210 flow [2023-11-06 22:13:56,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 33 transitions, 201 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:13:56,163 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 137 flow [2023-11-06 22:13:56,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-06 22:13:56,164 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2023-11-06 22:13:56,165 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 137 flow [2023-11-06 22:13:56,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 377.3333333333333) internal successors, (1132), 3 states have internal predecessors, (1132), 0 states have call successors, (0), 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 22:13:56,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:56,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:13:56,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:56,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:56,379 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:13:56,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:56,380 INFO L85 PathProgramCache]: Analyzing trace with hash 54529837, now seen corresponding path program 1 times [2023-11-06 22:13:56,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:13:56,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423176016] [2023-11-06 22:13:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:56,381 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 22:13:56,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:13:56,382 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:56,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:56,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:13:56,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:56,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:56,493 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 22:13:56,510 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 16 treesize of output 5 [2023-11-06 22:13:56,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:56,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:56,537 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 22:13:56,544 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:13:56,572 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 22:13:56,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:13:56,573 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:13:56,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423176016] [2023-11-06 22:13:56,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423176016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:56,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:56,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:13:56,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883464561] [2023-11-06 22:13:56,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:56,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:56,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:13:56,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:56,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:56,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 379 out of 940 [2023-11-06 22:13:56,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 380.3333333333333) internal successors, (1141), 3 states have internal predecessors, (1141), 0 states have call successors, (0), 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 22:13:56,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:56,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 379 of 940 [2023-11-06 22:13:56,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:57,110 INFO L124 PetriNetUnfolderBase]: 133/228 cut-off events. [2023-11-06 22:13:57,110 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-06 22:13:57,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 228 events. 133/228 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 693 event pairs, 82 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 534. Up to 228 conditions per place. [2023-11-06 22:13:57,113 INFO L140 encePairwiseOnDemand]: 937/940 looper letters, 30 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-11-06 22:13:57,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 195 flow [2023-11-06 22:13:57,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:57,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1160 transitions. [2023-11-06 22:13:57,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41134751773049644 [2023-11-06 22:13:57,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1160 transitions. [2023-11-06 22:13:57,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1160 transitions. [2023-11-06 22:13:57,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:57,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1160 transitions. [2023-11-06 22:13:57,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 386.6666666666667) internal successors, (1160), 3 states have internal predecessors, (1160), 0 states have call successors, (0), 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 22:13:57,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 940.0) internal successors, (3760), 4 states have internal predecessors, (3760), 0 states have call successors, (0), 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 22:13:57,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 940.0) internal successors, (3760), 4 states have internal predecessors, (3760), 0 states have call successors, (0), 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 22:13:57,135 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 137 flow. Second operand 3 states and 1160 transitions. [2023-11-06 22:13:57,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 195 flow [2023-11-06 22:13:57,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 31 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:57,138 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 134 flow [2023-11-06 22:13:57,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-11-06 22:13:57,139 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2023-11-06 22:13:57,139 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 134 flow [2023-11-06 22:13:57,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 380.3333333333333) internal successors, (1141), 3 states have internal predecessors, (1141), 0 states have call successors, (0), 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 22:13:57,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:57,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:13:57,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:57,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:57,354 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:13:57,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:57,354 INFO L85 PathProgramCache]: Analyzing trace with hash 863757368, now seen corresponding path program 1 times [2023-11-06 22:13:57,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:13:57,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559785028] [2023-11-06 22:13:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:57,355 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 22:13:57,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:13:57,357 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:57,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:57,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:13:57,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:57,493 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 22:13:57,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:57,511 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 22:13:57,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:57,524 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 22:13:57,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:57,537 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 22:13:57,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:57,553 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 22:13:57,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:57,562 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 22:13:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:57,694 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:13:57,695 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:13:57,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559785028] [2023-11-06 22:13:57,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559785028] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:57,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:57,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:13:57,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002464356] [2023-11-06 22:13:57,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:57,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:13:57,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:13:57,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:13:57,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:13:58,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 940 [2023-11-06 22:13:58,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 368.5) internal successors, (1474), 4 states have internal predecessors, (1474), 0 states have call successors, (0), 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 22:13:58,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:58,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 940 [2023-11-06 22:13:58,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:58,839 INFO L124 PetriNetUnfolderBase]: 147/267 cut-off events. [2023-11-06 22:13:58,839 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-11-06 22:13:58,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 267 events. 147/267 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 895 event pairs, 97 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 615. Up to 227 conditions per place. [2023-11-06 22:13:58,842 INFO L140 encePairwiseOnDemand]: 934/940 looper letters, 39 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2023-11-06 22:13:58,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 244 flow [2023-11-06 22:13:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:13:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:13:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1505 transitions. [2023-11-06 22:13:58,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4002659574468085 [2023-11-06 22:13:58,850 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1505 transitions. [2023-11-06 22:13:58,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1505 transitions. [2023-11-06 22:13:58,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:58,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1505 transitions. [2023-11-06 22:13:58,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 376.25) internal successors, (1505), 4 states have internal predecessors, (1505), 0 states have call successors, (0), 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 22:13:58,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 940.0) internal successors, (4700), 5 states have internal predecessors, (4700), 0 states have call successors, (0), 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 22:13:58,876 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 940.0) internal successors, (4700), 5 states have internal predecessors, (4700), 0 states have call successors, (0), 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 22:13:58,876 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 134 flow. Second operand 4 states and 1505 transitions. [2023-11-06 22:13:58,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 244 flow [2023-11-06 22:13:58,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 42 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:58,879 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 146 flow [2023-11-06 22:13:58,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=36, 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=4, PETRI_FLOW=146, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-11-06 22:13:58,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-11-06 22:13:58,880 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 146 flow [2023-11-06 22:13:58,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 368.5) internal successors, (1474), 4 states have internal predecessors, (1474), 0 states have call successors, (0), 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 22:13:58,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:58,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:13:58,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:59,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:59,094 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:13:59,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:59,094 INFO L85 PathProgramCache]: Analyzing trace with hash 863603764, now seen corresponding path program 1 times [2023-11-06 22:13:59,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:13:59,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267284488] [2023-11-06 22:13:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:59,095 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 22:13:59,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:13:59,096 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:59,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:13:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:59,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:13:59,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:59,204 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 22:13:59,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:59,216 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 22:13:59,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:59,237 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 22:13:59,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:59,246 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 22:13:59,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:59,271 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 22:13:59,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:13:59,281 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 22:13:59,396 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 22:13:59,396 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:13:59,396 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:13:59,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267284488] [2023-11-06 22:13:59,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267284488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:59,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:59,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:13:59,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867975457] [2023-11-06 22:13:59,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:59,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:13:59,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:13:59,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:13:59,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:13:59,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 374 out of 940 [2023-11-06 22:13:59,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 375.5) internal successors, (1502), 4 states have internal predecessors, (1502), 0 states have call successors, (0), 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 22:13:59,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:59,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 374 of 940 [2023-11-06 22:13:59,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:00,335 INFO L124 PetriNetUnfolderBase]: 211/373 cut-off events. [2023-11-06 22:14:00,335 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2023-11-06 22:14:00,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 373 events. 211/373 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1386 event pairs, 62 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 941. Up to 198 conditions per place. [2023-11-06 22:14:00,339 INFO L140 encePairwiseOnDemand]: 936/940 looper letters, 39 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2023-11-06 22:14:00,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 46 transitions, 286 flow [2023-11-06 22:14:00,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:14:00,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:14:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1531 transitions. [2023-11-06 22:14:00,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4071808510638298 [2023-11-06 22:14:00,346 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1531 transitions. [2023-11-06 22:14:00,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1531 transitions. [2023-11-06 22:14:00,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:00,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1531 transitions. [2023-11-06 22:14:00,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 382.75) internal successors, (1531), 4 states have internal predecessors, (1531), 0 states have call successors, (0), 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 22:14:00,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 940.0) internal successors, (4700), 5 states have internal predecessors, (4700), 0 states have call successors, (0), 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 22:14:00,380 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 940.0) internal successors, (4700), 5 states have internal predecessors, (4700), 0 states have call successors, (0), 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 22:14:00,380 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 146 flow. Second operand 4 states and 1531 transitions. [2023-11-06 22:14:00,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 46 transitions, 286 flow [2023-11-06 22:14:00,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 46 transitions, 281 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:14:00,384 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 169 flow [2023-11-06 22:14:00,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-11-06 22:14:00,385 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2023-11-06 22:14:00,385 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 169 flow [2023-11-06 22:14:00,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 375.5) internal successors, (1502), 4 states have internal predecessors, (1502), 0 states have call successors, (0), 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 22:14:00,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:00,386 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:14:00,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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)] Ended with exit code 0 [2023-11-06 22:14:00,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:00,597 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:14:00,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:00,598 INFO L85 PathProgramCache]: Analyzing trace with hash 773485636, now seen corresponding path program 2 times [2023-11-06 22:14:00,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:14:00,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340443222] [2023-11-06 22:14:00,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:14:00,598 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 22:14:00,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:14:00,599 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:00,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:00,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:14:00,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:14:00,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:14:00,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:00,711 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 22:14:00,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:14:00,729 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 22:14:00,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:14:00,742 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 22:14:00,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:14:00,751 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 22:14:00,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:14:00,762 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 22:14:00,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:14:00,774 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 22:14:00,987 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 22:14:00,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:01,703 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 22:14:01,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:14:01,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340443222] [2023-11-06 22:14:01,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340443222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:01,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:14:01,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:14:01,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119287630] [2023-11-06 22:14:01,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:01,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:14:01,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:14:01,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:14:01,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:14:07,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 374 out of 940 [2023-11-06 22:14:07,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 169 flow. Second operand has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 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 22:14:07,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:07,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 374 of 940 [2023-11-06 22:14:07,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:09,948 INFO L124 PetriNetUnfolderBase]: 217/385 cut-off events. [2023-11-06 22:14:09,948 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2023-11-06 22:14:09,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1118 conditions, 385 events. 217/385 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1444 event pairs, 149 based on Foata normal form. 6/367 useless extension candidates. Maximal degree in co-relation 1099. Up to 376 conditions per place. [2023-11-06 22:14:09,952 INFO L140 encePairwiseOnDemand]: 936/940 looper letters, 23 selfloop transitions, 21 changer transitions 0/44 dead transitions. [2023-11-06 22:14:09,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 44 transitions, 365 flow [2023-11-06 22:14:09,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:14:09,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:14:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4535 transitions. [2023-11-06 22:14:09,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4020390070921986 [2023-11-06 22:14:09,972 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4535 transitions. [2023-11-06 22:14:09,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4535 transitions. [2023-11-06 22:14:09,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:09,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4535 transitions. [2023-11-06 22:14:09,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 377.9166666666667) internal successors, (4535), 12 states have internal predecessors, (4535), 0 states have call successors, (0), 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 22:14:10,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 940.0) internal successors, (12220), 13 states have internal predecessors, (12220), 0 states have call successors, (0), 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 22:14:10,011 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 940.0) internal successors, (12220), 13 states have internal predecessors, (12220), 0 states have call successors, (0), 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 22:14:10,011 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 169 flow. Second operand 12 states and 4535 transitions. [2023-11-06 22:14:10,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 44 transitions, 365 flow [2023-11-06 22:14:10,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 44 transitions, 351 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:14:10,015 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 339 flow [2023-11-06 22:14:10,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=339, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2023-11-06 22:14:10,017 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2023-11-06 22:14:10,018 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 339 flow [2023-11-06 22:14:10,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 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 22:14:10,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:10,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:10,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:10,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:10,234 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:14:10,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:10,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1701473450, now seen corresponding path program 1 times [2023-11-06 22:14:10,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:14:10,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467058252] [2023-11-06 22:14:10,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:10,236 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 22:14:10,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:14:10,237 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:10,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:10,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:14:10,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:10,395 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 22:14:10,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:14:10,408 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 22:14:10,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:14:10,425 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 22:14:10,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:14:10,438 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 22:14:10,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:14:10,453 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 22:14:10,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:14:10,473 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 22:14:10,651 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 22:14:10,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:11,272 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 22:14:11,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:14:11,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467058252] [2023-11-06 22:14:11,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467058252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:11,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:14:11,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:14:11,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18250601] [2023-11-06 22:14:11,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:11,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:14:11,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:14:11,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:14:11,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:14:14,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 940 [2023-11-06 22:14:14,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 339 flow. Second operand has 10 states, 10 states have (on average 363.4) internal successors, (3634), 10 states have internal predecessors, (3634), 0 states have call successors, (0), 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 22:14:14,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:14,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 940 [2023-11-06 22:14:14,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:17,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:14:18,890 INFO L124 PetriNetUnfolderBase]: 432/736 cut-off events. [2023-11-06 22:14:18,890 INFO L125 PetriNetUnfolderBase]: For 289/289 co-relation queries the response was YES. [2023-11-06 22:14:18,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2083 conditions, 736 events. 432/736 cut-off events. For 289/289 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2970 event pairs, 2 based on Foata normal form. 42/718 useless extension candidates. Maximal degree in co-relation 2058. Up to 209 conditions per place. [2023-11-06 22:14:18,902 INFO L140 encePairwiseOnDemand]: 931/940 looper letters, 104 selfloop transitions, 30 changer transitions 0/134 dead transitions. [2023-11-06 22:14:18,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 134 transitions, 905 flow [2023-11-06 22:14:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:14:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:14:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4455 transitions. [2023-11-06 22:14:18,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949468085106383 [2023-11-06 22:14:18,918 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4455 transitions. [2023-11-06 22:14:18,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4455 transitions. [2023-11-06 22:14:18,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:18,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4455 transitions. [2023-11-06 22:14:18,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 371.25) internal successors, (4455), 12 states have internal predecessors, (4455), 0 states have call successors, (0), 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 22:14:18,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 940.0) internal successors, (12220), 13 states have internal predecessors, (12220), 0 states have call successors, (0), 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 22:14:18,950 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 940.0) internal successors, (12220), 13 states have internal predecessors, (12220), 0 states have call successors, (0), 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 22:14:18,950 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 339 flow. Second operand 12 states and 4455 transitions. [2023-11-06 22:14:18,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 134 transitions, 905 flow [2023-11-06 22:14:18,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 134 transitions, 823 flow, removed 32 selfloop flow, removed 5 redundant places. [2023-11-06 22:14:18,957 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 428 flow [2023-11-06 22:14:18,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=428, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2023-11-06 22:14:18,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2023-11-06 22:14:18,959 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 428 flow [2023-11-06 22:14:18,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 363.4) internal successors, (3634), 10 states have internal predecessors, (3634), 0 states have call successors, (0), 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 22:14:18,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:18,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:18,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:19,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:19,174 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:14:19,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:19,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1210813840, now seen corresponding path program 1 times [2023-11-06 22:14:19,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:14:19,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831650048] [2023-11-06 22:14:19,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:19,174 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 22:14:19,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:14:19,175 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:19,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:19,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:14:19,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:19,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:19,867 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:14:19,867 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 646 treesize of output 296 [2023-11-06 22:14:19,880 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 296 treesize of output 292 [2023-11-06 22:14:19,892 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 292 treesize of output 288 [2023-11-06 22:14:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:22,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:14:22,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831650048] [2023-11-06 22:14:22,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831650048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:22,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:14:22,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:14:22,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666648335] [2023-11-06 22:14:22,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:22,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:14:22,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:14:22,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:14:22,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:14:26,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 940 [2023-11-06 22:14:26,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 428 flow. Second operand has 10 states, 10 states have (on average 366.6) internal successors, (3666), 10 states have internal predecessors, (3666), 0 states have call successors, (0), 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 22:14:26,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:26,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 940 [2023-11-06 22:14:26,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:28,432 INFO L124 PetriNetUnfolderBase]: 654/1135 cut-off events. [2023-11-06 22:14:28,432 INFO L125 PetriNetUnfolderBase]: For 2109/2109 co-relation queries the response was YES. [2023-11-06 22:14:28,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4205 conditions, 1135 events. 654/1135 cut-off events. For 2109/2109 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5338 event pairs, 219 based on Foata normal form. 132/1167 useless extension candidates. Maximal degree in co-relation 4174. Up to 455 conditions per place. [2023-11-06 22:14:28,468 INFO L140 encePairwiseOnDemand]: 933/940 looper letters, 133 selfloop transitions, 10 changer transitions 0/143 dead transitions. [2023-11-06 22:14:28,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 143 transitions, 1215 flow [2023-11-06 22:14:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:14:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:14:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3357 transitions. [2023-11-06 22:14:28,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39680851063829786 [2023-11-06 22:14:28,481 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3357 transitions. [2023-11-06 22:14:28,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3357 transitions. [2023-11-06 22:14:28,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:28,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3357 transitions. [2023-11-06 22:14:28,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 373.0) internal successors, (3357), 9 states have internal predecessors, (3357), 0 states have call successors, (0), 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 22:14:28,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 940.0) internal successors, (9400), 10 states have internal predecessors, (9400), 0 states have call successors, (0), 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 22:14:28,503 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 940.0) internal successors, (9400), 10 states have internal predecessors, (9400), 0 states have call successors, (0), 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 22:14:28,503 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 428 flow. Second operand 9 states and 3357 transitions. [2023-11-06 22:14:28,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 143 transitions, 1215 flow [2023-11-06 22:14:28,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 143 transitions, 1136 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-11-06 22:14:28,516 INFO L231 Difference]: Finished difference. Result has 78 places, 62 transitions, 466 flow [2023-11-06 22:14:28,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=466, PETRI_PLACES=78, PETRI_TRANSITIONS=62} [2023-11-06 22:14:28,517 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2023-11-06 22:14:28,518 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 62 transitions, 466 flow [2023-11-06 22:14:28,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 366.6) internal successors, (3666), 10 states have internal predecessors, (3666), 0 states have call successors, (0), 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 22:14:28,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:28,519 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:28,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:28,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:28,740 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:14:28,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:28,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1086402034, now seen corresponding path program 2 times [2023-11-06 22:14:28,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:14:28,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853523452] [2023-11-06 22:14:28,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:14:28,741 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 22:14:28,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:14:28,742 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:28,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:28,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:14:28,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:14:28,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:14:28,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:28,912 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 1 [2023-11-06 22:14:29,198 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 137 treesize of output 57 [2023-11-06 22:14:29,215 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 7 treesize of output 5 [2023-11-06 22:14:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:29,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:29,561 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:14:29,561 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 646 treesize of output 296 [2023-11-06 22:14:29,581 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 296 treesize of output 292 [2023-11-06 22:14:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:33,662 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:14:33,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853523452] [2023-11-06 22:14:33,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853523452] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:33,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:14:33,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:14:33,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690629964] [2023-11-06 22:14:33,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:33,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:14:33,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:14:33,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:14:33,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:14:45,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 358 out of 940 [2023-11-06 22:14:45,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 62 transitions, 466 flow. Second operand has 12 states, 12 states have (on average 359.5) internal successors, (4314), 12 states have internal predecessors, (4314), 0 states have call successors, (0), 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 22:14:45,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:45,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 358 of 940 [2023-11-06 22:14:45,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:49,549 INFO L124 PetriNetUnfolderBase]: 798/1375 cut-off events. [2023-11-06 22:14:49,549 INFO L125 PetriNetUnfolderBase]: For 2793/2793 co-relation queries the response was YES. [2023-11-06 22:14:49,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5508 conditions, 1375 events. 798/1375 cut-off events. For 2793/2793 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6506 event pairs, 347 based on Foata normal form. 44/1299 useless extension candidates. Maximal degree in co-relation 5473. Up to 713 conditions per place. [2023-11-06 22:14:49,567 INFO L140 encePairwiseOnDemand]: 935/940 looper letters, 116 selfloop transitions, 19 changer transitions 0/135 dead transitions. [2023-11-06 22:14:49,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 135 transitions, 1140 flow [2023-11-06 22:14:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:14:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:14:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2928 transitions. [2023-11-06 22:14:49,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3893617021276596 [2023-11-06 22:14:49,578 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2928 transitions. [2023-11-06 22:14:49,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2928 transitions. [2023-11-06 22:14:49,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:49,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2928 transitions. [2023-11-06 22:14:49,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 366.0) internal successors, (2928), 8 states have internal predecessors, (2928), 0 states have call successors, (0), 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 22:14:49,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 940.0) internal successors, (8460), 9 states have internal predecessors, (8460), 0 states have call successors, (0), 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 22:14:49,601 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 940.0) internal successors, (8460), 9 states have internal predecessors, (8460), 0 states have call successors, (0), 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 22:14:49,601 INFO L175 Difference]: Start difference. First operand has 78 places, 62 transitions, 466 flow. Second operand 8 states and 2928 transitions. [2023-11-06 22:14:49,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 135 transitions, 1140 flow [2023-11-06 22:14:49,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 135 transitions, 1129 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-06 22:14:49,613 INFO L231 Difference]: Finished difference. Result has 83 places, 63 transitions, 507 flow [2023-11-06 22:14:49,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=940, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=507, PETRI_PLACES=83, PETRI_TRANSITIONS=63} [2023-11-06 22:14:49,614 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2023-11-06 22:14:49,614 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 63 transitions, 507 flow [2023-11-06 22:14:49,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 359.5) internal successors, (4314), 12 states have internal predecessors, (4314), 0 states have call successors, (0), 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 22:14:49,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:49,615 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:49,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:49,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:49,830 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:14:49,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:49,830 INFO L85 PathProgramCache]: Analyzing trace with hash 681292596, now seen corresponding path program 3 times [2023-11-06 22:14:49,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:14:49,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606451130] [2023-11-06 22:14:49,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:14:49,831 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 22:14:49,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:14:49,833 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:49,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c11631-feb1-4dee-a5c3-a37bb2a00abb/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 22:14:50,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:14:50,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:14:50,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:14:50,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:50,071 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 22:14:50,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:14:50,100 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 22:14:50,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:14:50,109 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 22:14:50,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:14:50,120 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 22:14:50,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:14:50,129 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 22:14:50,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:14:50,141 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 22:14:50,659 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 7 treesize of output 5 [2023-11-06 22:14:50,677 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 77 [2023-11-06 22:14:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:14:50,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:53,195 INFO L322 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2023-11-06 22:14:53,196 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 1138 treesize of output 543 [2023-11-06 22:14:53,207 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 543 treesize of output 535 [2023-11-06 22:15:25,135 WARN L293 SmtUtils]: Spent 7.22s on a formula simplification. DAG size of input: 176 DAG size of output: 142 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:15:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:15:39,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:15:39,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606451130] [2023-11-06 22:15:39,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606451130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:39,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:15:39,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:15:39,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004722166] [2023-11-06 22:15:39,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:39,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:15:39,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:15:39,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:15:39,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:15:45,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:15:46,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:15:52,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:16:01,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:16:08,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:16:12,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:16:28,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:16:34,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:16:37,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:16:40,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:16:42,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:16:42,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 940 [2023-11-06 22:16:42,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 63 transitions, 507 flow. Second operand has 10 states, 10 states have (on average 344.8) internal successors, (3448), 10 states have internal predecessors, (3448), 0 states have call successors, (0), 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 22:16:42,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:42,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 940 [2023-11-06 22:16:42,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand