./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:34:58,650 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:34:58,715 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 00:34:58,720 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:34:58,720 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:34:58,744 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:34:58,744 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:34:58,745 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:34:58,746 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:34:58,746 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:34:58,747 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:34:58,747 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:34:58,748 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:34:58,748 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:34:58,749 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:34:58,749 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:34:58,750 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:34:58,750 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:34:58,751 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:34:58,751 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:34:58,752 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:34:58,753 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:34:58,754 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:34:58,754 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:34:58,754 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:34:58,755 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:34:58,755 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:34:58,756 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:34:58,756 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:34:58,756 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:34:58,757 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:34:58,757 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:34:58,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:34:58,758 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:34:58,759 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:34:58,759 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:34:58,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:34:58,760 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:34:58,760 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:34:58,760 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:34:58,760 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:34:58,761 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_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2023-11-29 00:34:58,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:34:59,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:34:59,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:34:59,008 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:34:59,008 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:34:59,009 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2023-11-29 00:35:01,839 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:35:01,994 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:35:01,995 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2023-11-29 00:35:02,002 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/data/735beda18/24445a0a4904436dba75d795f17ff1ea/FLAG23dfb28e4 [2023-11-29 00:35:02,014 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/data/735beda18/24445a0a4904436dba75d795f17ff1ea [2023-11-29 00:35:02,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:35:02,018 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:35:02,019 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:35:02,019 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:35:02,024 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:35:02,025 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:35:02" (1/1) ... [2023-11-29 00:35:02,026 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ecb916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:02, skipping insertion in model container [2023-11-29 00:35:02,026 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:35:02" (1/1) ... [2023-11-29 00:35:02,053 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:35:02,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:35:02,253 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) [2023-11-29 00:35:02,253 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@36a1de05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:02, skipping insertion in model container [2023-11-29 00:35:02,254 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:35:02,254 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 00:35:02,256 INFO L158 Benchmark]: Toolchain (without parser) took 237.18ms. Allocated memory is still 148.9MB. Free memory was 101.9MB in the beginning and 91.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 00:35:02,256 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 148.9MB. Free memory is still 121.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 00:35:02,257 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.34ms. Allocated memory is still 148.9MB. Free memory was 101.9MB in the beginning and 91.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 00:35:02,258 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 148.9MB. Free memory is still 121.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 235.34ms. Allocated memory is still 148.9MB. Free memory was 101.9MB in the beginning and 91.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: 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_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:35:04,017 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:35:04,104 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 00:35:04,110 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:35:04,111 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:35:04,139 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:35:04,140 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:35:04,140 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:35:04,141 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:35:04,142 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:35:04,142 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:35:04,143 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:35:04,143 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:35:04,144 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:35:04,144 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:35:04,145 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:35:04,146 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:35:04,146 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:35:04,147 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:35:04,147 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:35:04,148 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:35:04,152 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:35:04,152 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:35:04,153 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:35:04,153 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:35:04,153 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 00:35:04,154 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 00:35:04,154 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:35:04,155 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:35:04,155 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:35:04,155 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:35:04,156 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:35:04,156 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:35:04,156 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:35:04,157 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:35:04,157 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:35:04,157 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:35:04,157 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 00:35:04,158 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 00:35:04,158 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:35:04,158 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:35:04,158 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:35:04,158 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:35:04,159 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 00:35:04,159 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_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2023-11-29 00:35:04,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:35:04,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:35:04,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:35:04,453 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:35:04,454 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:35:04,455 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2023-11-29 00:35:07,277 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:35:07,482 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:35:07,483 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2023-11-29 00:35:07,493 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/data/51281937b/7e23d632545345e6bad46c95c114cba8/FLAG0a3bbc120 [2023-11-29 00:35:07,509 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/data/51281937b/7e23d632545345e6bad46c95c114cba8 [2023-11-29 00:35:07,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:35:07,514 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:35:07,515 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:35:07,516 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:35:07,521 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:35:07,522 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:35:07" (1/1) ... [2023-11-29 00:35:07,523 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@393a03c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:07, skipping insertion in model container [2023-11-29 00:35:07,523 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:35:07" (1/1) ... [2023-11-29 00:35:07,548 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:35:07,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:35:07,776 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 00:35:07,781 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:35:07,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:35:07,811 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:35:07,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:35:07,860 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:35:07,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:07 WrapperNode [2023-11-29 00:35:07,861 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:35:07,862 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:35:07,862 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:35:07,862 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:35:07,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:07" (1/1) ... [2023-11-29 00:35:07,883 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:07" (1/1) ... [2023-11-29 00:35:07,915 INFO L138 Inliner]: procedures = 28, calls = 51, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 285 [2023-11-29 00:35:07,915 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:35:07,916 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:35:07,916 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:35:07,916 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:35:07,928 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:07" (1/1) ... [2023-11-29 00:35:07,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:07" (1/1) ... [2023-11-29 00:35:07,939 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:07" (1/1) ... [2023-11-29 00:35:07,959 INFO L175 MemorySlicer]: Split 23 memory accesses to 5 slices as follows [2, 2, 2, 15, 2]. 65 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 3, 1]. [2023-11-29 00:35:07,960 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:07" (1/1) ... [2023-11-29 00:35:07,960 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:07" (1/1) ... [2023-11-29 00:35:07,991 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:07" (1/1) ... [2023-11-29 00:35:07,999 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:07" (1/1) ... [2023-11-29 00:35:08,002 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:07" (1/1) ... [2023-11-29 00:35:08,005 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:07" (1/1) ... [2023-11-29 00:35:08,010 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:35:08,011 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:35:08,011 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:35:08,011 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:35:08,012 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:07" (1/1) ... [2023-11-29 00:35:08,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:35:08,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:35:08,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:35:08,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:35:08,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:35:08,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 00:35:08,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 00:35:08,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 00:35:08,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 00:35:08,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-29 00:35:08,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:35:08,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 00:35:08,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 00:35:08,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 00:35:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 00:35:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-29 00:35:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 00:35:08,085 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 00:35:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 00:35:08,085 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 00:35:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 00:35:08,086 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 00:35:08,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:35:08,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:35:08,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:35:08,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:35:08,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 00:35:08,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 00:35:08,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 00:35:08,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 00:35:08,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-29 00:35:08,089 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 00:35:08,233 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:35:08,236 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:35:09,095 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:35:09,473 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:35:09,473 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 00:35:09,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:35:09 BoogieIcfgContainer [2023-11-29 00:35:09,474 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:35:09,476 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:35:09,476 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:35:09,478 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:35:09,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:35:07" (1/3) ... [2023-11-29 00:35:09,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16dfd75a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:35:09, skipping insertion in model container [2023-11-29 00:35:09,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:07" (2/3) ... [2023-11-29 00:35:09,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16dfd75a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:35:09, skipping insertion in model container [2023-11-29 00:35:09,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:35:09" (3/3) ... [2023-11-29 00:35:09,481 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2023-11-29 00:35:09,510 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:35:09,511 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-29 00:35:09,511 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:35:09,589 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 00:35:09,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 107 transitions, 235 flow [2023-11-29 00:35:09,667 INFO L124 PetriNetUnfolderBase]: 9/104 cut-off events. [2023-11-29 00:35:09,667 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 00:35:09,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 104 events. 9/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 324 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-11-29 00:35:09,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 107 transitions, 235 flow [2023-11-29 00:35:09,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 103 transitions, 224 flow [2023-11-29 00:35:09,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:35:09,692 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;@327ab47f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:35:09,692 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-11-29 00:35:09,694 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:35:09,695 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 00:35:09,695 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:35:09,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:09,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:35:09,696 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:35:09,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:09,700 INFO L85 PathProgramCache]: Analyzing trace with hash 881931, now seen corresponding path program 1 times [2023-11-29 00:35:09,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:09,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065385417] [2023-11-29 00:35:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:09,709 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 [2023-11-29 00:35:09,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:09,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:09,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:09,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:35:09,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:09,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:35:09,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:09,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:09,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:09,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:09,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:09,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:09,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:09,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:09,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:09,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:09,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:09,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:10,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:10,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:10,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 00:35:10,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:10,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:10,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:10,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:10,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:10,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:10,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:10,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:10,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:10,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:10,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:10,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:10,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:10,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:10,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:10,235 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:10,236 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:10,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065385417] [2023-11-29 00:35:10,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065385417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:10,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:10,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:35:10,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127231507] [2023-11-29 00:35:10,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:10,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:35:10,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:10,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:35:10,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:35:10,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 107 [2023-11-29 00:35:10,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 103 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:10,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:10,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 107 [2023-11-29 00:35:10,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:10,999 INFO L124 PetriNetUnfolderBase]: 977/2230 cut-off events. [2023-11-29 00:35:11,000 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2023-11-29 00:35:11,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 2230 events. 977/2230 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16486 event pairs, 608 based on Foata normal form. 1/1480 useless extension candidates. Maximal degree in co-relation 3295. Up to 1318 conditions per place. [2023-11-29 00:35:11,030 INFO L140 encePairwiseOnDemand]: 101/107 looper letters, 36 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-11-29 00:35:11,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 98 transitions, 290 flow [2023-11-29 00:35:11,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:35:11,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:35:11,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-11-29 00:35:11,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7289719626168224 [2023-11-29 00:35:11,046 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-11-29 00:35:11,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-11-29 00:35:11,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:11,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-11-29 00:35:11,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:11,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:11,088 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:11,090 INFO L175 Difference]: Start difference. First operand has 104 places, 103 transitions, 224 flow. Second operand 3 states and 234 transitions. [2023-11-29 00:35:11,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 98 transitions, 290 flow [2023-11-29 00:35:11,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 98 transitions, 278 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 00:35:11,100 INFO L231 Difference]: Finished difference. Result has 95 places, 98 transitions, 206 flow [2023-11-29 00:35:11,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=95, PETRI_TRANSITIONS=98} [2023-11-29 00:35:11,105 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, -9 predicate places. [2023-11-29 00:35:11,106 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 98 transitions, 206 flow [2023-11-29 00:35:11,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:11,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:11,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:35:11,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:35:11,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:11,307 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:35:11,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:11,308 INFO L85 PathProgramCache]: Analyzing trace with hash 881932, now seen corresponding path program 1 times [2023-11-29 00:35:11,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:11,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366879909] [2023-11-29 00:35:11,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:11,309 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 [2023-11-29 00:35:11,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:11,310 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:11,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:11,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:35:11,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:11,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:35:11,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:11,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:11,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:11,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:11,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:11,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:11,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:11,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:11,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:11,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:11,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:11,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:11,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:11,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:11,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:35:11,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:11,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:11,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:11,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:11,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:11,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:11,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:11,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:11,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:11,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:11,837 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:11,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366879909] [2023-11-29 00:35:11,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366879909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:11,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:11,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:35:11,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982973308] [2023-11-29 00:35:11,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:11,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:35:11,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:11,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:35:11,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:35:12,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 107 [2023-11-29 00:35:12,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 98 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:12,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:12,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 107 [2023-11-29 00:35:12,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:13,015 INFO L124 PetriNetUnfolderBase]: 980/2239 cut-off events. [2023-11-29 00:35:13,016 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-29 00:35:13,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3614 conditions, 2239 events. 980/2239 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16552 event pairs, 608 based on Foata normal form. 0/1484 useless extension candidates. Maximal degree in co-relation 3564. Up to 1331 conditions per place. [2023-11-29 00:35:13,041 INFO L140 encePairwiseOnDemand]: 94/107 looper letters, 40 selfloop transitions, 10 changer transitions 0/107 dead transitions. [2023-11-29 00:35:13,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 107 transitions, 326 flow [2023-11-29 00:35:13,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:35:13,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:35:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 309 transitions. [2023-11-29 00:35:13,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7219626168224299 [2023-11-29 00:35:13,045 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 309 transitions. [2023-11-29 00:35:13,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 309 transitions. [2023-11-29 00:35:13,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:13,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 309 transitions. [2023-11-29 00:35:13,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:13,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:13,051 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:13,051 INFO L175 Difference]: Start difference. First operand has 95 places, 98 transitions, 206 flow. Second operand 4 states and 309 transitions. [2023-11-29 00:35:13,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 107 transitions, 326 flow [2023-11-29 00:35:13,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 107 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:35:13,055 INFO L231 Difference]: Finished difference. Result has 99 places, 107 transitions, 284 flow [2023-11-29 00:35:13,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=99, PETRI_TRANSITIONS=107} [2023-11-29 00:35:13,057 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, -5 predicate places. [2023-11-29 00:35:13,057 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 107 transitions, 284 flow [2023-11-29 00:35:13,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:13,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:13,057 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 00:35:13,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 00:35:13,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:13,258 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:35:13,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:13,259 INFO L85 PathProgramCache]: Analyzing trace with hash 847565216, now seen corresponding path program 1 times [2023-11-29 00:35:13,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:13,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182618217] [2023-11-29 00:35:13,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:13,260 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 [2023-11-29 00:35:13,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:13,262 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:13,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:13,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:35:13,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:13,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 00:35:13,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:13,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:13,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:13,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:13,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:13,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:13,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:13,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:13,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:13,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:13,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:13,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:13,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:35:13,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:13,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:13,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:13,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:13,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:13,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:13,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:13,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:13,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:13,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:13,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:13,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:35:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:14,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:14,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182618217] [2023-11-29 00:35:14,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182618217] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:35:14,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:35:14,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 00:35:14,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984788402] [2023-11-29 00:35:14,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:35:14,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:35:14,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:14,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:35:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:35:16,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 107 [2023-11-29 00:35:16,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 284 flow. Second operand has 10 states, 10 states have (on average 65.0) internal successors, (650), 10 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:16,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:16,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 107 [2023-11-29 00:35:16,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:18,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:35:20,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:35:21,398 INFO L124 PetriNetUnfolderBase]: 989/2266 cut-off events. [2023-11-29 00:35:21,398 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-29 00:35:21,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3732 conditions, 2266 events. 989/2266 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16723 event pairs, 608 based on Foata normal form. 0/1511 useless extension candidates. Maximal degree in co-relation 3578. Up to 1334 conditions per place. [2023-11-29 00:35:21,422 INFO L140 encePairwiseOnDemand]: 94/107 looper letters, 40 selfloop transitions, 37 changer transitions 0/134 dead transitions. [2023-11-29 00:35:21,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 134 transitions, 558 flow [2023-11-29 00:35:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:35:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:35:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 726 transitions. [2023-11-29 00:35:21,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785046728971963 [2023-11-29 00:35:21,427 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 726 transitions. [2023-11-29 00:35:21,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 726 transitions. [2023-11-29 00:35:21,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:21,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 726 transitions. [2023-11-29 00:35:21,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 72.6) internal successors, (726), 10 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:21,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:21,437 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:21,438 INFO L175 Difference]: Start difference. First operand has 99 places, 107 transitions, 284 flow. Second operand 10 states and 726 transitions. [2023-11-29 00:35:21,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 134 transitions, 558 flow [2023-11-29 00:35:21,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 134 transitions, 558 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:35:21,444 INFO L231 Difference]: Finished difference. Result has 111 places, 134 transitions, 528 flow [2023-11-29 00:35:21,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=528, PETRI_PLACES=111, PETRI_TRANSITIONS=134} [2023-11-29 00:35:21,446 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 7 predicate places. [2023-11-29 00:35:21,446 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 134 transitions, 528 flow [2023-11-29 00:35:21,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.0) internal successors, (650), 10 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:21,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:21,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 00:35:21,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:21,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:21,648 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:35:21,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:21,648 INFO L85 PathProgramCache]: Analyzing trace with hash 847567260, now seen corresponding path program 1 times [2023-11-29 00:35:21,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:21,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423684333] [2023-11-29 00:35:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:21,649 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 [2023-11-29 00:35:21,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:21,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:21,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:21,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:35:21,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:21,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:21,884 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 00:35:21,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-29 00:35:21,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:21,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:21,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:21,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-29 00:35:21,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:21,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:21,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:21,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:21,987 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:35:21,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-29 00:35:22,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:22,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:22,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:22,066 INFO L349 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-11-29 00:35:22,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 1 [2023-11-29 00:35:22,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:22,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:22,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:22,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-29 00:35:22,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:22,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:22,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:22,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:22,159 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:35:22,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-29 00:35:22,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:22,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 00:35:22,280 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 00:35:22,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 00:35:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:22,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:22,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:22,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423684333] [2023-11-29 00:35:22,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423684333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:22,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:22,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:35:22,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392574831] [2023-11-29 00:35:22,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:22,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:35:22,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:22,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:35:22,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:35:22,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 107 [2023-11-29 00:35:22,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 134 transitions, 528 flow. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:22,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:22,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 107 [2023-11-29 00:35:22,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:23,012 INFO L124 PetriNetUnfolderBase]: 989/2240 cut-off events. [2023-11-29 00:35:23,013 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-11-29 00:35:23,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3769 conditions, 2240 events. 989/2240 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16364 event pairs, 608 based on Foata normal form. 126/1643 useless extension candidates. Maximal degree in co-relation 3680. Up to 1362 conditions per place. [2023-11-29 00:35:23,038 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 73 selfloop transitions, 1 changer transitions 0/132 dead transitions. [2023-11-29 00:35:23,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 132 transitions, 672 flow [2023-11-29 00:35:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:35:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:35:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2023-11-29 00:35:23,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7320872274143302 [2023-11-29 00:35:23,041 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2023-11-29 00:35:23,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2023-11-29 00:35:23,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:23,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2023-11-29 00:35:23,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:23,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:23,045 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:23,045 INFO L175 Difference]: Start difference. First operand has 111 places, 134 transitions, 528 flow. Second operand 3 states and 235 transitions. [2023-11-29 00:35:23,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 132 transitions, 672 flow [2023-11-29 00:35:23,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 132 transitions, 577 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-11-29 00:35:23,052 INFO L231 Difference]: Finished difference. Result has 107 places, 132 transitions, 431 flow [2023-11-29 00:35:23,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=431, PETRI_PLACES=107, PETRI_TRANSITIONS=132} [2023-11-29 00:35:23,053 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 3 predicate places. [2023-11-29 00:35:23,054 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 132 transitions, 431 flow [2023-11-29 00:35:23,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:23,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:23,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 00:35:23,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 00:35:23,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:23,255 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:35:23,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:23,255 INFO L85 PathProgramCache]: Analyzing trace with hash 847567261, now seen corresponding path program 1 times [2023-11-29 00:35:23,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:23,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215847988] [2023-11-29 00:35:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:23,256 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 [2023-11-29 00:35:23,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:23,257 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:23,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:23,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 00:35:23,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:23,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 18 [2023-11-29 00:35:23,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 00:35:23,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,491 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 00:35:23,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-29 00:35:23,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 00:35:23,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,597 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 00:35:23,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2023-11-29 00:35:23,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 00:35:23,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,703 INFO L349 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2023-11-29 00:35:23,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2023-11-29 00:35:23,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-29 00:35:23,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,783 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 00:35:23,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2023-11-29 00:35:23,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 00:35:23,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 18 [2023-11-29 00:35:23,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 00:35:23,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,943 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-29 00:35:23,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2023-11-29 00:35:23,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:23,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 00:35:24,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 00:35:24,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,103 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:35:24,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2023-11-29 00:35:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:24,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:24,236 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:24,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215847988] [2023-11-29 00:35:24,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215847988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:24,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:24,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:35:24,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094942196] [2023-11-29 00:35:24,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:24,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:35:24,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:24,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:35:24,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:35:25,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 107 [2023-11-29 00:35:25,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 132 transitions, 431 flow. Second operand has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:25,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:25,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 107 [2023-11-29 00:35:25,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:25,778 INFO L124 PetriNetUnfolderBase]: 989/2214 cut-off events. [2023-11-29 00:35:25,778 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-29 00:35:25,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3698 conditions, 2214 events. 989/2214 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15963 event pairs, 608 based on Foata normal form. 126/1641 useless extension candidates. Maximal degree in co-relation 3685. Up to 1362 conditions per place. [2023-11-29 00:35:25,794 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 73 selfloop transitions, 1 changer transitions 0/130 dead transitions. [2023-11-29 00:35:25,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 130 transitions, 575 flow [2023-11-29 00:35:25,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:35:25,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:35:25,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2023-11-29 00:35:25,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7133956386292835 [2023-11-29 00:35:25,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 229 transitions. [2023-11-29 00:35:25,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 229 transitions. [2023-11-29 00:35:25,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:25,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 229 transitions. [2023-11-29 00:35:25,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:25,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:25,799 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:25,799 INFO L175 Difference]: Start difference. First operand has 107 places, 132 transitions, 431 flow. Second operand 3 states and 229 transitions. [2023-11-29 00:35:25,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 130 transitions, 575 flow [2023-11-29 00:35:25,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 130 transitions, 574 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:35:25,803 INFO L231 Difference]: Finished difference. Result has 106 places, 130 transitions, 428 flow [2023-11-29 00:35:25,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=428, PETRI_PLACES=106, PETRI_TRANSITIONS=130} [2023-11-29 00:35:25,804 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 2 predicate places. [2023-11-29 00:35:25,805 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 130 transitions, 428 flow [2023-11-29 00:35:25,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:25,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:25,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:25,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:26,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:26,006 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:35:26,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:26,007 INFO L85 PathProgramCache]: Analyzing trace with hash -235543036, now seen corresponding path program 1 times [2023-11-29 00:35:26,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:26,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399489429] [2023-11-29 00:35:26,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:26,007 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 [2023-11-29 00:35:26,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:26,008 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:26,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:26,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:35:26,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:26,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 00:35:26,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:26,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:26,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:26,278 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:35:26,286 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:35:26,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 00:35:26,343 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:35:26,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,359 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:35:26,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 00:35:26,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 00:35:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:26,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:26,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:26,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399489429] [2023-11-29 00:35:26,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399489429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:26,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:26,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:35:26,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338034904] [2023-11-29 00:35:26,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:26,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:35:26,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:26,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:35:26,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:35:26,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 107 [2023-11-29 00:35:26,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 130 transitions, 428 flow. Second operand has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:26,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:26,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 107 [2023-11-29 00:35:26,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:27,249 INFO L124 PetriNetUnfolderBase]: 989/2206 cut-off events. [2023-11-29 00:35:27,249 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-29 00:35:27,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3691 conditions, 2206 events. 989/2206 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15819 event pairs, 608 based on Foata normal form. 25/1540 useless extension candidates. Maximal degree in co-relation 3677. Up to 1362 conditions per place. [2023-11-29 00:35:27,261 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 73 selfloop transitions, 1 changer transitions 0/128 dead transitions. [2023-11-29 00:35:27,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 128 transitions, 572 flow [2023-11-29 00:35:27,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:35:27,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:35:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2023-11-29 00:35:27,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7320872274143302 [2023-11-29 00:35:27,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2023-11-29 00:35:27,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2023-11-29 00:35:27,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:27,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2023-11-29 00:35:27,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:27,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:27,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:27,265 INFO L175 Difference]: Start difference. First operand has 106 places, 130 transitions, 428 flow. Second operand 3 states and 235 transitions. [2023-11-29 00:35:27,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 128 transitions, 572 flow [2023-11-29 00:35:27,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 128 transitions, 571 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:35:27,268 INFO L231 Difference]: Finished difference. Result has 105 places, 128 transitions, 425 flow [2023-11-29 00:35:27,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=425, PETRI_PLACES=105, PETRI_TRANSITIONS=128} [2023-11-29 00:35:27,269 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2023-11-29 00:35:27,269 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 128 transitions, 425 flow [2023-11-29 00:35:27,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:27,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:27,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:27,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 00:35:27,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:27,470 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:35:27,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:27,471 INFO L85 PathProgramCache]: Analyzing trace with hash -235543037, now seen corresponding path program 1 times [2023-11-29 00:35:27,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:27,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008301256] [2023-11-29 00:35:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:27,471 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 [2023-11-29 00:35:27,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:27,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:27,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:27,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:35:27,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:27,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,598 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 00:35:27,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-29 00:35:27,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:35:27,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,678 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:35:27,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-29 00:35:27,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-29 00:35:27,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,742 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:35:27,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 00:35:27,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-29 00:35:27,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,798 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:35:27,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-29 00:35:27,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:35:27,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:27,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 00:35:27,879 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 00:35:27,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 00:35:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:27,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:27,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:27,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008301256] [2023-11-29 00:35:27,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008301256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:27,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:27,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:35:27,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702233176] [2023-11-29 00:35:27,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:27,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:35:27,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:27,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:35:27,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:35:28,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 107 [2023-11-29 00:35:28,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 128 transitions, 425 flow. Second operand has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:28,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:28,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 107 [2023-11-29 00:35:28,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:28,529 INFO L124 PetriNetUnfolderBase]: 989/2198 cut-off events. [2023-11-29 00:35:28,530 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-29 00:35:28,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3684 conditions, 2198 events. 989/2198 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15703 event pairs, 608 based on Foata normal form. 25/1540 useless extension candidates. Maximal degree in co-relation 3669. Up to 1362 conditions per place. [2023-11-29 00:35:28,541 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 73 selfloop transitions, 1 changer transitions 0/126 dead transitions. [2023-11-29 00:35:28,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 126 transitions, 569 flow [2023-11-29 00:35:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:35:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:35:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2023-11-29 00:35:28,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7320872274143302 [2023-11-29 00:35:28,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2023-11-29 00:35:28,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2023-11-29 00:35:28,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:28,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2023-11-29 00:35:28,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:28,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:28,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:28,547 INFO L175 Difference]: Start difference. First operand has 105 places, 128 transitions, 425 flow. Second operand 3 states and 235 transitions. [2023-11-29 00:35:28,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 126 transitions, 569 flow [2023-11-29 00:35:28,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 126 transitions, 568 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:35:28,551 INFO L231 Difference]: Finished difference. Result has 104 places, 126 transitions, 422 flow [2023-11-29 00:35:28,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=422, PETRI_PLACES=104, PETRI_TRANSITIONS=126} [2023-11-29 00:35:28,552 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 0 predicate places. [2023-11-29 00:35:28,552 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 126 transitions, 422 flow [2023-11-29 00:35:28,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:28,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:28,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:28,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 00:35:28,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:28,756 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:35:28,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:28,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1288195623, now seen corresponding path program 1 times [2023-11-29 00:35:28,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:28,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116553365] [2023-11-29 00:35:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:28,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:28,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:28,758 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:28,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:28,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:35:28,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:28,886 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:28,886 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:28,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116553365] [2023-11-29 00:35:28,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116553365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:28,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:28,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:35:28,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805989116] [2023-11-29 00:35:28,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:28,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:35:28,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:28,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:35:28,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:35:28,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 107 [2023-11-29 00:35:28,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 126 transitions, 422 flow. Second operand has 5 states, 5 states have (on average 67.4) internal successors, (337), 5 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:28,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:28,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 107 [2023-11-29 00:35:28,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:29,590 INFO L124 PetriNetUnfolderBase]: 1848/3807 cut-off events. [2023-11-29 00:35:29,590 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-29 00:35:29,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6599 conditions, 3807 events. 1848/3807 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 28364 event pairs, 797 based on Foata normal form. 0/2734 useless extension candidates. Maximal degree in co-relation 6583. Up to 1591 conditions per place. [2023-11-29 00:35:29,611 INFO L140 encePairwiseOnDemand]: 102/107 looper letters, 143 selfloop transitions, 4 changer transitions 0/198 dead transitions. [2023-11-29 00:35:29,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 198 transitions, 955 flow [2023-11-29 00:35:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:35:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:35:29,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 421 transitions. [2023-11-29 00:35:29,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7869158878504673 [2023-11-29 00:35:29,614 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 421 transitions. [2023-11-29 00:35:29,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 421 transitions. [2023-11-29 00:35:29,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:29,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 421 transitions. [2023-11-29 00:35:29,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:29,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:29,617 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:29,617 INFO L175 Difference]: Start difference. First operand has 104 places, 126 transitions, 422 flow. Second operand 5 states and 421 transitions. [2023-11-29 00:35:29,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 198 transitions, 955 flow [2023-11-29 00:35:29,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 198 transitions, 954 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:35:29,622 INFO L231 Difference]: Finished difference. Result has 109 places, 127 transitions, 438 flow [2023-11-29 00:35:29,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=109, PETRI_TRANSITIONS=127} [2023-11-29 00:35:29,623 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 5 predicate places. [2023-11-29 00:35:29,623 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 127 transitions, 438 flow [2023-11-29 00:35:29,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.4) internal successors, (337), 5 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:29,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:29,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:29,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-29 00:35:29,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:29,825 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:35:29,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:29,825 INFO L85 PathProgramCache]: Analyzing trace with hash 914897484, now seen corresponding path program 1 times [2023-11-29 00:35:29,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:29,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284076599] [2023-11-29 00:35:29,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:29,826 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 [2023-11-29 00:35:29,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:29,829 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:29,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:29,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:35:29,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:29,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:29,987 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 00:35:29,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2023-11-29 00:35:29,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,001 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:35:30,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 00:35:30,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,015 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:35:30,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 00:35:30,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,044 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:35:30,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 00:35:30,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,055 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:35:30,055 INFO L378 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 21 treesize of output 1 [2023-11-29 00:35:30,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,066 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:35:30,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 00:35:30,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,094 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:35:30,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 00:35:30,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,105 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:35:30,106 INFO L378 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 21 treesize of output 1 [2023-11-29 00:35:30,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,116 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:35:30,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 00:35:30,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,155 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:35:30,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-29 00:35:30,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,179 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:35:30,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 00:35:30,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,204 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:35:30,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-29 00:35:30,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:30,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 00:35:30,263 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 00:35:30,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 00:35:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:30,369 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:30,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:30,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284076599] [2023-11-29 00:35:30,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284076599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:30,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:30,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:35:30,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544362252] [2023-11-29 00:35:30,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:30,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:35:30,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:30,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:35:30,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:35:30,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 107 [2023-11-29 00:35:30,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 127 transitions, 438 flow. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:30,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:30,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 107 [2023-11-29 00:35:30,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:31,277 INFO L124 PetriNetUnfolderBase]: 1679/3857 cut-off events. [2023-11-29 00:35:31,277 INFO L125 PetriNetUnfolderBase]: For 339/339 co-relation queries the response was YES. [2023-11-29 00:35:31,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6606 conditions, 3857 events. 1679/3857 cut-off events. For 339/339 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 31340 event pairs, 1091 based on Foata normal form. 53/2739 useless extension candidates. Maximal degree in co-relation 6587. Up to 2353 conditions per place. [2023-11-29 00:35:31,297 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 74 selfloop transitions, 1 changer transitions 0/125 dead transitions. [2023-11-29 00:35:31,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 125 transitions, 584 flow [2023-11-29 00:35:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:35:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:35:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2023-11-29 00:35:31,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7320872274143302 [2023-11-29 00:35:31,299 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2023-11-29 00:35:31,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2023-11-29 00:35:31,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:31,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2023-11-29 00:35:31,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:31,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:31,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:31,302 INFO L175 Difference]: Start difference. First operand has 109 places, 127 transitions, 438 flow. Second operand 3 states and 235 transitions. [2023-11-29 00:35:31,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 125 transitions, 584 flow [2023-11-29 00:35:31,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 125 transitions, 580 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 00:35:31,305 INFO L231 Difference]: Finished difference. Result has 108 places, 125 transitions, 432 flow [2023-11-29 00:35:31,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=108, PETRI_TRANSITIONS=125} [2023-11-29 00:35:31,306 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 4 predicate places. [2023-11-29 00:35:31,306 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 125 transitions, 432 flow [2023-11-29 00:35:31,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:31,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:31,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:31,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-29 00:35:31,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:31,508 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:35:31,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:31,508 INFO L85 PathProgramCache]: Analyzing trace with hash -597365829, now seen corresponding path program 1 times [2023-11-29 00:35:31,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:31,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616704222] [2023-11-29 00:35:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:31,509 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 [2023-11-29 00:35:31,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:31,510 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:31,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:31,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:35:31,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:35:31,699 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:31,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:31,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616704222] [2023-11-29 00:35:31,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616704222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:31,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:31,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:35:31,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419575651] [2023-11-29 00:35:31,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:31,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:35:31,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:31,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:35:31,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:35:31,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 107 [2023-11-29 00:35:31,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 125 transitions, 432 flow. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:31,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:31,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 107 [2023-11-29 00:35:31,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:32,878 INFO L124 PetriNetUnfolderBase]: 3218/7502 cut-off events. [2023-11-29 00:35:32,879 INFO L125 PetriNetUnfolderBase]: For 775/775 co-relation queries the response was YES. [2023-11-29 00:35:32,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12782 conditions, 7502 events. 3218/7502 cut-off events. For 775/775 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 69479 event pairs, 2056 based on Foata normal form. 62/5352 useless extension candidates. Maximal degree in co-relation 12762. Up to 2576 conditions per place. [2023-11-29 00:35:32,946 INFO L140 encePairwiseOnDemand]: 102/107 looper letters, 125 selfloop transitions, 9 changer transitions 0/183 dead transitions. [2023-11-29 00:35:32,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 183 transitions, 872 flow [2023-11-29 00:35:32,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:35:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:35:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 418 transitions. [2023-11-29 00:35:32,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7813084112149533 [2023-11-29 00:35:32,948 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 418 transitions. [2023-11-29 00:35:32,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 418 transitions. [2023-11-29 00:35:32,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:32,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 418 transitions. [2023-11-29 00:35:32,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.6) internal successors, (418), 5 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:32,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:32,951 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:32,951 INFO L175 Difference]: Start difference. First operand has 108 places, 125 transitions, 432 flow. Second operand 5 states and 418 transitions. [2023-11-29 00:35:32,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 183 transitions, 872 flow [2023-11-29 00:35:32,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 183 transitions, 871 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:35:32,958 INFO L231 Difference]: Finished difference. Result has 113 places, 127 transitions, 470 flow [2023-11-29 00:35:32,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=470, PETRI_PLACES=113, PETRI_TRANSITIONS=127} [2023-11-29 00:35:32,959 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 9 predicate places. [2023-11-29 00:35:32,959 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 127 transitions, 470 flow [2023-11-29 00:35:32,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:32,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:32,960 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 00:35:32,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-11-29 00:35:33,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:33,161 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:35:33,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:33,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1807935836, now seen corresponding path program 2 times [2023-11-29 00:35:33,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:33,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738938370] [2023-11-29 00:35:33,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:35:33,162 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 [2023-11-29 00:35:33,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:33,163 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:33,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:33,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:35:33,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:35:33,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:35:33,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:33,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-29 00:35:33,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:33,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:33,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:33,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:33,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:33,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:33,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:33,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:33,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:33,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:33,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:33,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:33,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:33,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:33,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:33,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:33,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:33,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:33,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:33,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:33,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:33,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:33,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:33,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:33,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:35:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:34,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:34,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738938370] [2023-11-29 00:35:34,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738938370] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:35:34,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:35:34,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 00:35:34,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909226074] [2023-11-29 00:35:34,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:35:34,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:35:34,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:34,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:35:34,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:35:40,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 107 [2023-11-29 00:35:40,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 127 transitions, 470 flow. Second operand has 14 states, 14 states have (on average 65.57142857142857) internal successors, (918), 14 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:40,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:40,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 107 [2023-11-29 00:35:40,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:47,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:35:49,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:35:51,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:35:55,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:35:56,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:35:59,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:02,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:04,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:07,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:09,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:12,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:14,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:16,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:19,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:22,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:24,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:27,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:29,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:31,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:32,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:33,545 INFO L124 PetriNetUnfolderBase]: 3091/7281 cut-off events. [2023-11-29 00:36:33,545 INFO L125 PetriNetUnfolderBase]: For 1971/1971 co-relation queries the response was YES. [2023-11-29 00:36:33,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12992 conditions, 7281 events. 3091/7281 cut-off events. For 1971/1971 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 67582 event pairs, 2057 based on Foata normal form. 42/5109 useless extension candidates. Maximal degree in co-relation 12970. Up to 4272 conditions per place. [2023-11-29 00:36:33,580 INFO L140 encePairwiseOnDemand]: 94/107 looper letters, 43 selfloop transitions, 91 changer transitions 0/181 dead transitions. [2023-11-29 00:36:33,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 181 transitions, 1014 flow [2023-11-29 00:36:33,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:36:33,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 00:36:33,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1557 transitions. [2023-11-29 00:36:33,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6614273576890399 [2023-11-29 00:36:33,588 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1557 transitions. [2023-11-29 00:36:33,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1557 transitions. [2023-11-29 00:36:33,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:33,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1557 transitions. [2023-11-29 00:36:33,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 70.77272727272727) internal successors, (1557), 22 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:33,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 107.0) internal successors, (2461), 23 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:33,597 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 107.0) internal successors, (2461), 23 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:33,597 INFO L175 Difference]: Start difference. First operand has 113 places, 127 transitions, 470 flow. Second operand 22 states and 1557 transitions. [2023-11-29 00:36:33,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 181 transitions, 1014 flow [2023-11-29 00:36:33,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 181 transitions, 1000 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 00:36:33,603 INFO L231 Difference]: Finished difference. Result has 139 places, 181 transitions, 1000 flow [2023-11-29 00:36:33,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1000, PETRI_PLACES=139, PETRI_TRANSITIONS=181} [2023-11-29 00:36:33,604 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 35 predicate places. [2023-11-29 00:36:33,604 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 181 transitions, 1000 flow [2023-11-29 00:36:33,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 65.57142857142857) internal successors, (918), 14 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:33,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:33,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:33,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-29 00:36:33,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:36:33,806 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:36:33,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:33,806 INFO L85 PathProgramCache]: Analyzing trace with hash 914897485, now seen corresponding path program 1 times [2023-11-29 00:36:33,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:36:33,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207175115] [2023-11-29 00:36:33,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:33,806 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 [2023-11-29 00:36:33,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:36:33,807 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:36:33,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:36:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:33,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:36:33,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:33,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 00:36:33,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:33,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:33,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:36:33,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:33,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:33,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:33,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:33,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:33,994 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:36:34,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:34,001 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:36:34,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:34,009 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:36:34,014 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:36:34,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:34,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:34,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:36:34,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:34,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:34,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:34,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:34,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:34,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:34,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:34,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:34,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:34,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:34,079 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:36:34,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:34,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 00:36:34,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:34,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 00:36:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:34,287 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:36:34,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:36:34,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207175115] [2023-11-29 00:36:34,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207175115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:36:34,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:36:34,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:36:34,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525124784] [2023-11-29 00:36:34,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:36:34,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:36:34,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:36:34,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:36:34,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:36:34,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 107 [2023-11-29 00:36:34,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 181 transitions, 1000 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:34,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:34,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 107 [2023-11-29 00:36:34,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:35,880 INFO L124 PetriNetUnfolderBase]: 3091/7238 cut-off events. [2023-11-29 00:36:35,880 INFO L125 PetriNetUnfolderBase]: For 2002/2002 co-relation queries the response was YES. [2023-11-29 00:36:35,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13257 conditions, 7238 events. 3091/7238 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 66987 event pairs, 2057 based on Foata normal form. 101/5203 useless extension candidates. Maximal degree in co-relation 13228. Up to 4431 conditions per place. [2023-11-29 00:36:35,936 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 130 selfloop transitions, 1 changer transitions 0/179 dead transitions. [2023-11-29 00:36:35,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 179 transitions, 1258 flow [2023-11-29 00:36:35,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:36:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:36:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2023-11-29 00:36:35,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7320872274143302 [2023-11-29 00:36:35,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2023-11-29 00:36:35,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2023-11-29 00:36:35,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:35,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2023-11-29 00:36:35,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:35,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:35,940 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:35,940 INFO L175 Difference]: Start difference. First operand has 139 places, 181 transitions, 1000 flow. Second operand 3 states and 235 transitions. [2023-11-29 00:36:35,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 179 transitions, 1258 flow [2023-11-29 00:36:35,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 179 transitions, 1001 flow, removed 67 selfloop flow, removed 10 redundant places. [2023-11-29 00:36:35,951 INFO L231 Difference]: Finished difference. Result has 129 places, 179 transitions, 741 flow [2023-11-29 00:36:35,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=741, PETRI_PLACES=129, PETRI_TRANSITIONS=179} [2023-11-29 00:36:35,952 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 25 predicate places. [2023-11-29 00:36:35,952 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 179 transitions, 741 flow [2023-11-29 00:36:35,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:35,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:35,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:35,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-29 00:36:36,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:36:36,154 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:36:36,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:36,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1702828452, now seen corresponding path program 1 times [2023-11-29 00:36:36,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:36:36,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304424862] [2023-11-29 00:36:36,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:36,155 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 [2023-11-29 00:36:36,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:36:36,156 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:36:36,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:36:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:36,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:36:36,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:36,375 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:36:36,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:36:36,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304424862] [2023-11-29 00:36:36,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304424862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:36:36,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:36:36,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:36:36,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889325514] [2023-11-29 00:36:36,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:36:36,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:36:36,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:36:36,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:36:36,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:36:36,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 107 [2023-11-29 00:36:36,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 179 transitions, 741 flow. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:36,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:36,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 107 [2023-11-29 00:36:36,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:37,712 INFO L124 PetriNetUnfolderBase]: 2934/7150 cut-off events. [2023-11-29 00:36:37,712 INFO L125 PetriNetUnfolderBase]: For 1895/1895 co-relation queries the response was YES. [2023-11-29 00:36:37,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12684 conditions, 7150 events. 2934/7150 cut-off events. For 1895/1895 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 67468 event pairs, 1754 based on Foata normal form. 0/4994 useless extension candidates. Maximal degree in co-relation 12656. Up to 2827 conditions per place. [2023-11-29 00:36:37,759 INFO L140 encePairwiseOnDemand]: 102/107 looper letters, 229 selfloop transitions, 4 changer transitions 0/280 dead transitions. [2023-11-29 00:36:37,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 280 transitions, 1609 flow [2023-11-29 00:36:37,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:36:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:36:37,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2023-11-29 00:36:37,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7738317757009345 [2023-11-29 00:36:37,762 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 414 transitions. [2023-11-29 00:36:37,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 414 transitions. [2023-11-29 00:36:37,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:37,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 414 transitions. [2023-11-29 00:36:37,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:37,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:37,766 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:37,766 INFO L175 Difference]: Start difference. First operand has 129 places, 179 transitions, 741 flow. Second operand 5 states and 414 transitions. [2023-11-29 00:36:37,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 280 transitions, 1609 flow [2023-11-29 00:36:37,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 280 transitions, 1608 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:36:37,781 INFO L231 Difference]: Finished difference. Result has 134 places, 180 transitions, 757 flow [2023-11-29 00:36:37,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=757, PETRI_PLACES=134, PETRI_TRANSITIONS=180} [2023-11-29 00:36:37,782 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 30 predicate places. [2023-11-29 00:36:37,783 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 180 transitions, 757 flow [2023-11-29 00:36:37,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:37,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:37,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:37,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-11-29 00:36:37,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:36:37,984 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:36:37,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:37,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1143830126, now seen corresponding path program 1 times [2023-11-29 00:36:37,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:36:37,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080481265] [2023-11-29 00:36:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:37,985 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 [2023-11-29 00:36:37,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:36:37,986 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:36:37,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:36:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:38,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:36:38,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:38,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2023-11-29 00:36:38,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:36:38,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:36:38,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:38,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:36:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:38,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:36:38,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:38,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:38,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:36:38,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:36:38,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:38,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:38,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:36:38,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:36:38,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:38,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:38,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:36:38,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:38,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:36:38,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:38,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:36:38,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:36:38,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:38,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:36:38,446 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-29 00:36:38,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 00:36:38,475 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 00:36:38,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 00:36:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:36:38,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:36:38,500 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:36:38,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080481265] [2023-11-29 00:36:38,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080481265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:36:38,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:36:38,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:36:38,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507274651] [2023-11-29 00:36:38,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:36:38,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:36:38,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:36:38,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:36:38,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:36:38,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 107 [2023-11-29 00:36:38,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 180 transitions, 757 flow. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:38,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:38,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 107 [2023-11-29 00:36:38,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:40,111 INFO L124 PetriNetUnfolderBase]: 3697/8657 cut-off events. [2023-11-29 00:36:40,112 INFO L125 PetriNetUnfolderBase]: For 2471/2471 co-relation queries the response was YES. [2023-11-29 00:36:40,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15722 conditions, 8657 events. 3697/8657 cut-off events. For 2471/2471 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 81606 event pairs, 2679 based on Foata normal form. 0/6303 useless extension candidates. Maximal degree in co-relation 15691. Up to 5151 conditions per place. [2023-11-29 00:36:40,175 INFO L140 encePairwiseOnDemand]: 100/107 looper letters, 113 selfloop transitions, 23 changer transitions 0/176 dead transitions. [2023-11-29 00:36:40,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 176 transitions, 1021 flow [2023-11-29 00:36:40,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:36:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:36:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 326 transitions. [2023-11-29 00:36:40,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6093457943925233 [2023-11-29 00:36:40,178 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 326 transitions. [2023-11-29 00:36:40,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 326 transitions. [2023-11-29 00:36:40,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:40,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 326 transitions. [2023-11-29 00:36:40,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.2) internal successors, (326), 5 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:40,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:40,182 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:40,182 INFO L175 Difference]: Start difference. First operand has 134 places, 180 transitions, 757 flow. Second operand 5 states and 326 transitions. [2023-11-29 00:36:40,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 176 transitions, 1021 flow [2023-11-29 00:36:40,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 176 transitions, 1016 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:36:40,196 INFO L231 Difference]: Finished difference. Result has 132 places, 176 transitions, 790 flow [2023-11-29 00:36:40,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=790, PETRI_PLACES=132, PETRI_TRANSITIONS=176} [2023-11-29 00:36:40,197 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 28 predicate places. [2023-11-29 00:36:40,197 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 176 transitions, 790 flow [2023-11-29 00:36:40,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:40,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:40,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:36:40,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-11-29 00:36:40,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:36:40,398 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:36:40,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:40,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1143830125, now seen corresponding path program 1 times [2023-11-29 00:36:40,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:36:40,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412841238] [2023-11-29 00:36:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:36:40,399 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 [2023-11-29 00:36:40,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:36:40,400 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:36:40,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:36:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:36:40,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:36:40,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:40,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 00:36:40,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-29 00:36:40,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:40,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:36:40,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:40,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:40,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:40,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:36:40,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:40,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:40,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:40,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:36:40,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:40,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:40,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:36:40,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:40,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:36:40,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:40,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:40,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:40,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:36:40,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:40,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:40,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:36:40,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:40,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:36:40,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:40,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:40,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:36:40,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:40,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:36:40,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:40,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:40,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:40,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:36:40,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:40,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:41,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:36:41,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:41,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:36:41,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:41,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:41,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:36:41,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:41,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:36:41,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:41,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:41,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:41,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:36:41,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:41,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:41,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:36:41,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:41,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:36:41,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:41,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 00:36:41,272 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-29 00:36:41,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 00:36:41,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:41,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 00:36:41,391 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:36:41,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 00:36:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:36:41,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:36:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:36:48,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:36:48,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412841238] [2023-11-29 00:36:48,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412841238] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:36:48,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:36:48,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 00:36:48,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956649679] [2023-11-29 00:36:48,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:36:48,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:36:48,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:36:48,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:36:48,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=140, Unknown=1, NotChecked=0, Total=182 [2023-11-29 00:36:54,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:36:59,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:37:00,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:37:05,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:37:10,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:37:12,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:37:16,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:37:21,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:37:22,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:37:24,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:37:28,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:37:29,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:37:34,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:37:39,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:37:41,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:37:44,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:37:46,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:37:50,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:37:57,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:38:04,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:38:10,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:38:15,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:38:20,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:38:20,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 107 [2023-11-29 00:38:20,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 176 transitions, 790 flow. Second operand has 14 states, 14 states have (on average 26.714285714285715) internal successors, (374), 14 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:38:20,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:38:20,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 107 [2023-11-29 00:38:20,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:38:28,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:38:42,230 INFO L124 PetriNetUnfolderBase]: 49154/77707 cut-off events. [2023-11-29 00:38:42,230 INFO L125 PetriNetUnfolderBase]: For 14043/14043 co-relation queries the response was YES. [2023-11-29 00:38:42,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156883 conditions, 77707 events. 49154/77707 cut-off events. For 14043/14043 co-relation queries the response was YES. Maximal size of possible extension queue 3253. Compared 672395 event pairs, 18358 based on Foata normal form. 0/58413 useless extension candidates. Maximal degree in co-relation 156852. Up to 13379 conditions per place. [2023-11-29 00:38:42,895 INFO L140 encePairwiseOnDemand]: 92/107 looper letters, 353 selfloop transitions, 197 changer transitions 0/569 dead transitions. [2023-11-29 00:38:42,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 569 transitions, 3220 flow [2023-11-29 00:38:42,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 00:38:42,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 00:38:42,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 992 transitions. [2023-11-29 00:38:42,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40308817553839904 [2023-11-29 00:38:42,900 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 992 transitions. [2023-11-29 00:38:42,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 992 transitions. [2023-11-29 00:38:42,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:38:42,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 992 transitions. [2023-11-29 00:38:42,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 43.130434782608695) internal successors, (992), 23 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:38:42,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 107.0) internal successors, (2568), 24 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:38:42,906 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 107.0) internal successors, (2568), 24 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:38:42,906 INFO L175 Difference]: Start difference. First operand has 132 places, 176 transitions, 790 flow. Second operand 23 states and 992 transitions. [2023-11-29 00:38:42,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 569 transitions, 3220 flow [2023-11-29 00:38:42,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 569 transitions, 3163 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:38:42,945 INFO L231 Difference]: Finished difference. Result has 152 places, 290 transitions, 1710 flow [2023-11-29 00:38:42,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1710, PETRI_PLACES=152, PETRI_TRANSITIONS=290} [2023-11-29 00:38:42,946 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 48 predicate places. [2023-11-29 00:38:42,946 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 290 transitions, 1710 flow [2023-11-29 00:38:42,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 26.714285714285715) internal successors, (374), 14 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:38:42,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:38:42,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:38:42,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-29 00:38:43,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:38:43,147 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:38:43,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:38:43,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1098994626, now seen corresponding path program 1 times [2023-11-29 00:38:43,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:38:43,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690835] [2023-11-29 00:38:43,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:38:43,148 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 [2023-11-29 00:38:43,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:38:43,149 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:38:43,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:38:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 00:38:43,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:38:43,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:38:43,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:38:43,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:38:43,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 14 [2023-11-29 00:38:43,527 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:38:43,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 00:38:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:38:43,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:38:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:38:44,400 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:38:44,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690835] [2023-11-29 00:38:44,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690835] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:38:44,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:38:44,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-29 00:38:44,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788071983] [2023-11-29 00:38:44,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:38:44,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:38:44,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:38:44,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:38:44,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:38:49,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 107 [2023-11-29 00:38:49,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 290 transitions, 1710 flow. Second operand has 10 states, 10 states have (on average 62.9) internal successors, (629), 10 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:38:49,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:38:49,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 107 [2023-11-29 00:38:49,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:38:59,829 INFO L124 PetriNetUnfolderBase]: 26048/51872 cut-off events. [2023-11-29 00:38:59,830 INFO L125 PetriNetUnfolderBase]: For 13601/13601 co-relation queries the response was YES. [2023-11-29 00:39:00,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99430 conditions, 51872 events. 26048/51872 cut-off events. For 13601/13601 co-relation queries the response was YES. Maximal size of possible extension queue 2232. Compared 545965 event pairs, 11107 based on Foata normal form. 0/40914 useless extension candidates. Maximal degree in co-relation 99397. Up to 9947 conditions per place. [2023-11-29 00:39:00,336 INFO L140 encePairwiseOnDemand]: 92/107 looper letters, 226 selfloop transitions, 349 changer transitions 0/619 dead transitions. [2023-11-29 00:39:00,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 619 transitions, 4405 flow [2023-11-29 00:39:00,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 00:39:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 00:39:00,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1665 transitions. [2023-11-29 00:39:00,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6765542462413653 [2023-11-29 00:39:00,341 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1665 transitions. [2023-11-29 00:39:00,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1665 transitions. [2023-11-29 00:39:00,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:00,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1665 transitions. [2023-11-29 00:39:00,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 72.3913043478261) internal successors, (1665), 23 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:00,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 107.0) internal successors, (2568), 24 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:00,350 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 107.0) internal successors, (2568), 24 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:00,350 INFO L175 Difference]: Start difference. First operand has 152 places, 290 transitions, 1710 flow. Second operand 23 states and 1665 transitions. [2023-11-29 00:39:00,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 619 transitions, 4405 flow [2023-11-29 00:39:00,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 619 transitions, 4300 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-29 00:39:00,402 INFO L231 Difference]: Finished difference. Result has 173 places, 449 transitions, 3420 flow [2023-11-29 00:39:00,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3420, PETRI_PLACES=173, PETRI_TRANSITIONS=449} [2023-11-29 00:39:00,403 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 69 predicate places. [2023-11-29 00:39:00,403 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 449 transitions, 3420 flow [2023-11-29 00:39:00,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.9) internal successors, (629), 10 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:00,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:00,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:00,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-11-29 00:39:00,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:39:00,604 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:39:00,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:00,604 INFO L85 PathProgramCache]: Analyzing trace with hash -586780599, now seen corresponding path program 1 times [2023-11-29 00:39:00,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:39:00,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102176329] [2023-11-29 00:39:00,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:00,605 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 [2023-11-29 00:39:00,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:39:00,606 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:39:00,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-29 00:39:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:00,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:39:00,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:39:00,826 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:39:00,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:39:00,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102176329] [2023-11-29 00:39:00,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102176329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:00,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:00,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:39:00,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121757602] [2023-11-29 00:39:00,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:00,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:39:00,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:39:00,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:39:00,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:39:00,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 107 [2023-11-29 00:39:00,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 449 transitions, 3420 flow. Second operand has 5 states, 5 states have (on average 68.2) internal successors, (341), 5 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:00,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:00,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 107 [2023-11-29 00:39:00,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:10,701 INFO L124 PetriNetUnfolderBase]: 40786/79404 cut-off events. [2023-11-29 00:39:10,701 INFO L125 PetriNetUnfolderBase]: For 36530/36918 co-relation queries the response was YES. [2023-11-29 00:39:11,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164947 conditions, 79404 events. 40786/79404 cut-off events. For 36530/36918 co-relation queries the response was YES. Maximal size of possible extension queue 3112. Compared 872539 event pairs, 20340 based on Foata normal form. 1422/67932 useless extension candidates. Maximal degree in co-relation 164911. Up to 35663 conditions per place. [2023-11-29 00:39:11,428 INFO L140 encePairwiseOnDemand]: 102/107 looper letters, 447 selfloop transitions, 51 changer transitions 0/547 dead transitions. [2023-11-29 00:39:11,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 547 transitions, 5022 flow [2023-11-29 00:39:11,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:39:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:39:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2023-11-29 00:39:11,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7738317757009345 [2023-11-29 00:39:11,429 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 414 transitions. [2023-11-29 00:39:11,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 414 transitions. [2023-11-29 00:39:11,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:11,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 414 transitions. [2023-11-29 00:39:11,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:11,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:11,431 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:11,431 INFO L175 Difference]: Start difference. First operand has 173 places, 449 transitions, 3420 flow. Second operand 5 states and 414 transitions. [2023-11-29 00:39:11,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 547 transitions, 5022 flow [2023-11-29 00:39:11,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 547 transitions, 4974 flow, removed 24 selfloop flow, removed 0 redundant places. [2023-11-29 00:39:11,583 INFO L231 Difference]: Finished difference. Result has 179 places, 451 transitions, 3535 flow [2023-11-29 00:39:11,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3535, PETRI_PLACES=179, PETRI_TRANSITIONS=451} [2023-11-29 00:39:11,583 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 75 predicate places. [2023-11-29 00:39:11,584 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 451 transitions, 3535 flow [2023-11-29 00:39:11,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.2) internal successors, (341), 5 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:11,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:11,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:11,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-29 00:39:11,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:39:11,784 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:39:11,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:11,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1098994627, now seen corresponding path program 1 times [2023-11-29 00:39:11,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:39:11,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403391912] [2023-11-29 00:39:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:11,785 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 [2023-11-29 00:39:11,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:39:11,786 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:39:11,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-29 00:39:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:11,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:39:11,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:11,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:39:11,990 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 00:39:11,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 00:39:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:39:12,038 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:39:12,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:39:12,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403391912] [2023-11-29 00:39:12,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403391912] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:12,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:12,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:39:12,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428414806] [2023-11-29 00:39:12,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:12,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:39:12,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:39:12,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:39:12,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:39:12,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 107 [2023-11-29 00:39:12,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 451 transitions, 3535 flow. Second operand has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:12,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:12,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 107 [2023-11-29 00:39:12,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:25,412 INFO L124 PetriNetUnfolderBase]: 54430/100737 cut-off events. [2023-11-29 00:39:25,412 INFO L125 PetriNetUnfolderBase]: For 59260/59260 co-relation queries the response was YES. [2023-11-29 00:39:26,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222539 conditions, 100737 events. 54430/100737 cut-off events. For 59260/59260 co-relation queries the response was YES. Maximal size of possible extension queue 3508. Compared 1064572 event pairs, 42474 based on Foata normal form. 2174/91918 useless extension candidates. Maximal degree in co-relation 222500. Up to 76856 conditions per place. [2023-11-29 00:39:26,454 INFO L140 encePairwiseOnDemand]: 100/107 looper letters, 333 selfloop transitions, 75 changer transitions 0/447 dead transitions. [2023-11-29 00:39:26,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 447 transitions, 4343 flow [2023-11-29 00:39:26,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:39:26,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:39:26,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 330 transitions. [2023-11-29 00:39:26,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.616822429906542 [2023-11-29 00:39:26,456 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 330 transitions. [2023-11-29 00:39:26,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 330 transitions. [2023-11-29 00:39:26,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:26,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 330 transitions. [2023-11-29 00:39:26,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:26,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:26,458 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:26,459 INFO L175 Difference]: Start difference. First operand has 179 places, 451 transitions, 3535 flow. Second operand 5 states and 330 transitions. [2023-11-29 00:39:26,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 447 transitions, 4343 flow [2023-11-29 00:39:26,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 447 transitions, 4303 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:39:26,690 INFO L231 Difference]: Finished difference. Result has 178 places, 447 transitions, 3637 flow [2023-11-29 00:39:26,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3637, PETRI_PLACES=178, PETRI_TRANSITIONS=447} [2023-11-29 00:39:26,691 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 74 predicate places. [2023-11-29 00:39:26,691 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 447 transitions, 3637 flow [2023-11-29 00:39:26,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:26,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:26,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:26,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-29 00:39:26,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:39:26,892 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:39:26,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:26,892 INFO L85 PathProgramCache]: Analyzing trace with hash -372421830, now seen corresponding path program 1 times [2023-11-29 00:39:26,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:39:26,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296437218] [2023-11-29 00:39:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:26,893 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 [2023-11-29 00:39:26,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:39:26,894 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:39:26,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-29 00:39:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:27,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:39:27,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:27,092 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:39:27,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:39:27,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296437218] [2023-11-29 00:39:27,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296437218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:27,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:27,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:39:27,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815375368] [2023-11-29 00:39:27,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:27,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:39:27,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:39:27,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:39:27,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:39:27,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 107 [2023-11-29 00:39:27,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 447 transitions, 3637 flow. Second operand has 5 states, 5 states have (on average 68.2) internal successors, (341), 5 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:27,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:27,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 107 [2023-11-29 00:39:27,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:37,469 INFO L124 PetriNetUnfolderBase]: 41107/81878 cut-off events. [2023-11-29 00:39:37,469 INFO L125 PetriNetUnfolderBase]: For 46050/46810 co-relation queries the response was YES. [2023-11-29 00:39:37,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173813 conditions, 81878 events. 41107/81878 cut-off events. For 46050/46810 co-relation queries the response was YES. Maximal size of possible extension queue 3313. Compared 917193 event pairs, 29864 based on Foata normal form. 0/66864 useless extension candidates. Maximal degree in co-relation 173773. Up to 53899 conditions per place. [2023-11-29 00:39:38,214 INFO L140 encePairwiseOnDemand]: 102/107 looper letters, 507 selfloop transitions, 16 changer transitions 0/568 dead transitions. [2023-11-29 00:39:38,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 568 transitions, 5562 flow [2023-11-29 00:39:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:39:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:39:38,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 410 transitions. [2023-11-29 00:39:38,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7663551401869159 [2023-11-29 00:39:38,216 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 410 transitions. [2023-11-29 00:39:38,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 410 transitions. [2023-11-29 00:39:38,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:38,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 410 transitions. [2023-11-29 00:39:38,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:38,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:38,218 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:38,218 INFO L175 Difference]: Start difference. First operand has 178 places, 447 transitions, 3637 flow. Second operand 5 states and 410 transitions. [2023-11-29 00:39:38,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 568 transitions, 5562 flow [2023-11-29 00:39:38,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 568 transitions, 5436 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:39:38,376 INFO L231 Difference]: Finished difference. Result has 181 places, 448 transitions, 3571 flow [2023-11-29 00:39:38,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=3530, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3571, PETRI_PLACES=181, PETRI_TRANSITIONS=448} [2023-11-29 00:39:38,376 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 77 predicate places. [2023-11-29 00:39:38,376 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 448 transitions, 3571 flow [2023-11-29 00:39:38,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.2) internal successors, (341), 5 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:38,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:38,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:38,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-11-29 00:39:38,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:39:38,577 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:39:38,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:38,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1380269698, now seen corresponding path program 1 times [2023-11-29 00:39:38,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:39:38,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547265214] [2023-11-29 00:39:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:38,578 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 [2023-11-29 00:39:38,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:39:38,579 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:39:38,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-29 00:39:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:38,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 00:39:38,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:38,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 00:39:38,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:39:38,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:38,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:38,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:38,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:38,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:39:38,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:38,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:38,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:38,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:38,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:39:38,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:38,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:38,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:38,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:38,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:38,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:38,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:38,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:38,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:38,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:38,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:38,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:39,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:39,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:39:39,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:39,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:39,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:39,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:39,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:39,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:39,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:39:39,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:39,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:39,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:39,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:39,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:39:39,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:39,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:39,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:39,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:39,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:39,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:39,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:39,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:39,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:39:39,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:39,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:39,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:39,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:39,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:39:39,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:39,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:39,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:39,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 00:39:39,370 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:39:39,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 00:39:39,444 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 00:39:39,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-11-29 00:39:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:39,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:39:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:41,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:39:41,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547265214] [2023-11-29 00:39:41,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547265214] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:39:41,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:39:41,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-11-29 00:39:41,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409615108] [2023-11-29 00:39:41,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:39:41,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:39:41,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:39:41,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:39:41,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:39:45,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:39:50,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:39:55,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:39:57,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:40:02,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:40:04,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:40:08,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:40:09,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:40:17,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:40:24,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:40:29,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:40:36,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:40:37,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 107 [2023-11-29 00:40:37,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 448 transitions, 3571 flow. Second operand has 19 states, 19 states have (on average 50.36842105263158) internal successors, (957), 19 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:37,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:40:37,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 107 [2023-11-29 00:40:37,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:27,919 INFO L124 PetriNetUnfolderBase]: 174413/292458 cut-off events. [2023-11-29 00:41:27,919 INFO L125 PetriNetUnfolderBase]: For 140368/143726 co-relation queries the response was YES. [2023-11-29 00:41:29,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632794 conditions, 292458 events. 174413/292458 cut-off events. For 140368/143726 co-relation queries the response was YES. Maximal size of possible extension queue 9988. Compared 3120780 event pairs, 70678 based on Foata normal form. 0/252547 useless extension candidates. Maximal degree in co-relation 632753. Up to 70671 conditions per place. [2023-11-29 00:41:31,149 INFO L140 encePairwiseOnDemand]: 92/107 looper letters, 423 selfloop transitions, 347 changer transitions 0/799 dead transitions. [2023-11-29 00:41:31,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 799 transitions, 6552 flow [2023-11-29 00:41:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 00:41:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-29 00:41:31,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2005 transitions. [2023-11-29 00:41:31,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.567827810818465 [2023-11-29 00:41:31,155 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2005 transitions. [2023-11-29 00:41:31,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2005 transitions. [2023-11-29 00:41:31,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:31,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2005 transitions. [2023-11-29 00:41:31,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 60.75757575757576) internal successors, (2005), 33 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:31,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 107.0) internal successors, (3638), 34 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:31,166 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 107.0) internal successors, (3638), 34 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:31,166 INFO L175 Difference]: Start difference. First operand has 181 places, 448 transitions, 3571 flow. Second operand 33 states and 2005 transitions. [2023-11-29 00:41:31,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 799 transitions, 6552 flow [2023-11-29 00:41:31,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 799 transitions, 6521 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:41:31,772 INFO L231 Difference]: Finished difference. Result has 216 places, 468 transitions, 4405 flow [2023-11-29 00:41:31,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4405, PETRI_PLACES=216, PETRI_TRANSITIONS=468} [2023-11-29 00:41:31,772 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 112 predicate places. [2023-11-29 00:41:31,772 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 468 transitions, 4405 flow [2023-11-29 00:41:31,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 50.36842105263158) internal successors, (957), 19 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:31,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:31,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:31,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-11-29 00:41:31,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:41:31,974 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:41:31,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:31,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1308999471, now seen corresponding path program 1 times [2023-11-29 00:41:31,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:41:31,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936223739] [2023-11-29 00:41:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:31,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:41:31,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:41:31,976 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:41:31,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-29 00:41:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:32,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:41:32,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:41:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:41:32,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:41:32,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:41:32,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936223739] [2023-11-29 00:41:32,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936223739] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:32,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:32,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:41:32,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152734821] [2023-11-29 00:41:32,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:32,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:41:32,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:41:32,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:41:32,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:41:32,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 107 [2023-11-29 00:41:32,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 468 transitions, 4405 flow. Second operand has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:32,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:32,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 107 [2023-11-29 00:41:32,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:50,784 INFO L124 PetriNetUnfolderBase]: 70752/138315 cut-off events. [2023-11-29 00:41:50,785 INFO L125 PetriNetUnfolderBase]: For 92541/95033 co-relation queries the response was YES. [2023-11-29 00:41:51,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307587 conditions, 138315 events. 70752/138315 cut-off events. For 92541/95033 co-relation queries the response was YES. Maximal size of possible extension queue 5530. Compared 1625757 event pairs, 50611 based on Foata normal form. 998/122035 useless extension candidates. Maximal degree in co-relation 307539. Up to 84710 conditions per place. [2023-11-29 00:41:52,480 INFO L140 encePairwiseOnDemand]: 102/107 looper letters, 456 selfloop transitions, 53 changer transitions 0/559 dead transitions. [2023-11-29 00:41:52,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 559 transitions, 5997 flow [2023-11-29 00:41:52,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:41:52,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:41:52,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 407 transitions. [2023-11-29 00:41:52,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7607476635514019 [2023-11-29 00:41:52,482 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 407 transitions. [2023-11-29 00:41:52,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 407 transitions. [2023-11-29 00:41:52,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:52,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 407 transitions. [2023-11-29 00:41:52,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.4) internal successors, (407), 5 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:52,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:52,483 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:52,483 INFO L175 Difference]: Start difference. First operand has 216 places, 468 transitions, 4405 flow. Second operand 5 states and 407 transitions. [2023-11-29 00:41:52,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 559 transitions, 5997 flow [2023-11-29 00:41:52,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 559 transitions, 5884 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-11-29 00:41:52,977 INFO L231 Difference]: Finished difference. Result has 215 places, 470 transitions, 4427 flow [2023-11-29 00:41:52,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=4292, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4427, PETRI_PLACES=215, PETRI_TRANSITIONS=470} [2023-11-29 00:41:52,978 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 111 predicate places. [2023-11-29 00:41:52,978 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 470 transitions, 4427 flow [2023-11-29 00:41:52,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:52,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:52,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:52,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-11-29 00:41:53,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:41:53,179 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:41:53,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:53,179 INFO L85 PathProgramCache]: Analyzing trace with hash 161313221, now seen corresponding path program 1 times [2023-11-29 00:41:53,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:41:53,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591070925] [2023-11-29 00:41:53,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:53,179 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 [2023-11-29 00:41:53,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:41:53,180 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:41:53,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-29 00:41:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:53,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:41:53,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:41:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:41:53,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:41:53,678 INFO L378 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 25 treesize of output 21 [2023-11-29 00:41:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:41:53,755 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:41:53,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591070925] [2023-11-29 00:41:53,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591070925] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:41:53,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:41:53,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-29 00:41:53,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041261274] [2023-11-29 00:41:53,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:41:53,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:41:53,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:41:53,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:41:53,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:41:57,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 107 [2023-11-29 00:41:57,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 470 transitions, 4427 flow. Second operand has 10 states, 10 states have (on average 66.2) internal successors, (662), 10 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:57,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:57,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 107 [2023-11-29 00:41:57,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:42:25,602 INFO L124 PetriNetUnfolderBase]: 101703/180828 cut-off events. [2023-11-29 00:42:25,602 INFO L125 PetriNetUnfolderBase]: For 119491/122648 co-relation queries the response was YES. [2023-11-29 00:42:27,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414789 conditions, 180828 events. 101703/180828 cut-off events. For 119491/122648 co-relation queries the response was YES. Maximal size of possible extension queue 6796. Compared 1984512 event pairs, 33017 based on Foata normal form. 0/167748 useless extension candidates. Maximal degree in co-relation 414739. Up to 51433 conditions per place. [2023-11-29 00:42:27,833 INFO L140 encePairwiseOnDemand]: 95/107 looper letters, 446 selfloop transitions, 124 changer transitions 0/618 dead transitions. [2023-11-29 00:42:27,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 618 transitions, 6421 flow [2023-11-29 00:42:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:42:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 00:42:27,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 640 transitions. [2023-11-29 00:42:27,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7476635514018691 [2023-11-29 00:42:27,835 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 640 transitions. [2023-11-29 00:42:27,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 640 transitions. [2023-11-29 00:42:27,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:42:27,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 640 transitions. [2023-11-29 00:42:27,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.0) internal successors, (640), 8 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:27,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 107.0) internal successors, (963), 9 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:27,837 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 107.0) internal successors, (963), 9 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:27,837 INFO L175 Difference]: Start difference. First operand has 215 places, 470 transitions, 4427 flow. Second operand 8 states and 640 transitions. [2023-11-29 00:42:27,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 618 transitions, 6421 flow [2023-11-29 00:42:28,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 618 transitions, 6328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:42:28,499 INFO L231 Difference]: Finished difference. Result has 221 places, 473 transitions, 4657 flow [2023-11-29 00:42:28,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=4332, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4657, PETRI_PLACES=221, PETRI_TRANSITIONS=473} [2023-11-29 00:42:28,499 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 117 predicate places. [2023-11-29 00:42:28,500 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 473 transitions, 4657 flow [2023-11-29 00:42:28,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 66.2) internal successors, (662), 10 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:28,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:42:28,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:28,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-11-29 00:42:28,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:42:28,700 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-29 00:42:28,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:28,701 INFO L85 PathProgramCache]: Analyzing trace with hash 387672729, now seen corresponding path program 1 times [2023-11-29 00:42:28,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:42:28,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332152866] [2023-11-29 00:42:28,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:28,701 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 [2023-11-29 00:42:28,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:42:28,702 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:42:28,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec0932f0-3442-402f-9f4e-4ba55faa1133/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-29 00:42:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:28,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:42:28,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:42:28,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:42:29,179 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:42:29,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332152866] [2023-11-29 00:42:29,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332152866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:29,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:42:29,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 00:42:29,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090606034] [2023-11-29 00:42:29,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:29,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:42:29,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:42:29,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:42:29,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:42:29,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 107 [2023-11-29 00:42:29,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 473 transitions, 4657 flow. Second operand has 14 states, 14 states have (on average 67.85714285714286) internal successors, (950), 14 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:29,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:42:29,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 107 [2023-11-29 00:42:29,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand