./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:49:54,576 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:49:54,699 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 10:49:54,706 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:49:54,707 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:49:54,746 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:49:54,747 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:49:54,747 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:49:54,749 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:49:54,754 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:49:54,754 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:49:54,755 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:49:54,756 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:49:54,758 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:49:54,759 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:49:54,759 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:49:54,760 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:49:54,760 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:49:54,761 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:49:54,761 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:49:54,762 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:49:54,763 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:49:54,763 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:49:54,764 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:49:54,764 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:49:54,765 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:49:54,765 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:49:54,766 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:49:54,767 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:49:54,767 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:49:54,769 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:49:54,769 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:49:54,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:54,770 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:49:54,770 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:49:54,770 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:49:54,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:49:54,771 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:49:54,771 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:49:54,772 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:49:54,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:49:54,773 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_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 [2023-11-26 10:49:55,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:49:55,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:49:55,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:49:55,148 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:49:55,149 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:49:55,150 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-26 10:49:58,362 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:49:58,600 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:49:58,601 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-26 10:49:58,610 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/data/afb8a4922/8d229e85e8c4423281648ac9ed416740/FLAGbbfab76ff [2023-11-26 10:49:58,626 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/data/afb8a4922/8d229e85e8c4423281648ac9ed416740 [2023-11-26 10:49:58,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:49:58,630 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:49:58,632 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:58,632 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:49:58,646 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:49:58,647 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:58" (1/1) ... [2023-11-26 10:49:58,648 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4458588e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:58, skipping insertion in model container [2023-11-26 10:49:58,649 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:58" (1/1) ... [2023-11-26 10:49:58,686 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:49:58,934 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:58,948 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-26 10:49:58,949 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1587bcfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:58, skipping insertion in model container [2023-11-26 10:49:58,949 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:58,950 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-26 10:49:58,952 INFO L158 Benchmark]: Toolchain (without parser) took 320.60ms. Allocated memory was 130.0MB in the beginning and 157.3MB in the end (delta: 27.3MB). Free memory was 71.9MB in the beginning and 126.6MB in the end (delta: -54.6MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. [2023-11-26 10:49:58,953 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 130.0MB. Free memory was 104.2MB in the beginning and 104.0MB in the end (delta: 184.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 10:49:58,954 INFO L158 Benchmark]: CACSL2BoogieTranslator took 317.41ms. Allocated memory was 130.0MB in the beginning and 157.3MB in the end (delta: 27.3MB). Free memory was 71.8MB in the beginning and 126.6MB in the end (delta: -54.8MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. [2023-11-26 10:49:58,957 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 130.0MB. Free memory was 104.2MB in the beginning and 104.0MB in the end (delta: 184.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 317.41ms. Allocated memory was 130.0MB in the beginning and 157.3MB in the end (delta: 27.3MB). Free memory was 71.8MB in the beginning and 126.6MB in the end (delta: -54.8MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:50:01,512 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:50:01,584 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-26 10:50:01,607 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:50:01,608 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:50:01,642 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:50:01,643 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:50:01,644 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:50:01,645 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:50:01,645 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:50:01,646 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:50:01,647 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:50:01,648 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:50:01,648 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:50:01,649 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:50:01,650 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:50:01,651 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:50:01,651 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:50:01,652 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:50:01,653 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:50:01,653 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:50:01,654 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:50:01,655 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:50:01,655 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:50:01,656 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:50:01,656 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-26 10:50:01,657 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-26 10:50:01,658 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:50:01,658 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:50:01,659 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:50:01,659 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:50:01,660 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:50:01,660 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:50:01,661 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:50:01,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:50:01,662 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:50:01,662 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:50:01,663 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-26 10:50:01,663 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-26 10:50:01,664 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:50:01,664 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:50:01,665 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:50:01,665 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:50:01,666 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-26 10:50:01,666 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_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 [2023-11-26 10:50:02,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:50:02,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:50:02,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:50:02,118 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:50:02,119 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:50:02,120 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-26 10:50:05,384 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:50:05,718 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:50:05,719 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-26 10:50:05,737 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/data/e727e9b62/6ed79eed7b40454a99eae7d797e344f1/FLAG816f0a51a [2023-11-26 10:50:05,763 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/data/e727e9b62/6ed79eed7b40454a99eae7d797e344f1 [2023-11-26 10:50:05,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:50:05,776 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:50:05,780 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:50:05,780 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:50:05,786 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:50:05,787 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:50:05" (1/1) ... [2023-11-26 10:50:05,789 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48627d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:05, skipping insertion in model container [2023-11-26 10:50:05,789 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:50:05" (1/1) ... [2023-11-26 10:50:05,831 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:50:06,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:50:06,157 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-26 10:50:06,170 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:50:06,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:50:06,222 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:50:06,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:50:06,285 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:50:06,286 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:50:06,294 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:50:06,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:06 WrapperNode [2023-11-26 10:50:06,295 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:50:06,296 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:50:06,297 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:50:06,297 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:50:06,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:06" (1/1) ... [2023-11-26 10:50:06,329 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:06" (1/1) ... [2023-11-26 10:50:06,376 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 156 [2023-11-26 10:50:06,377 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:50:06,378 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:50:06,378 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:50:06,378 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:50:06,394 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:06" (1/1) ... [2023-11-26 10:50:06,394 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:06" (1/1) ... [2023-11-26 10:50:06,399 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:06" (1/1) ... [2023-11-26 10:50:06,437 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 4, 2, 2]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-26 10:50:06,437 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:06" (1/1) ... [2023-11-26 10:50:06,437 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:06" (1/1) ... [2023-11-26 10:50:06,476 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:06" (1/1) ... [2023-11-26 10:50:06,497 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:06" (1/1) ... [2023-11-26 10:50:06,500 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:06" (1/1) ... [2023-11-26 10:50:06,502 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:06" (1/1) ... [2023-11-26 10:50:06,527 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:50:06,528 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:50:06,528 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:50:06,528 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:50:06,529 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:06" (1/1) ... [2023-11-26 10:50:06,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:50:06,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:06,579 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:50:06,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:50:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:50:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-26 10:50:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-26 10:50:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-26 10:50:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-26 10:50:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:50:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-26 10:50:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-26 10:50:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-26 10:50:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-26 10:50:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 10:50:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 10:50:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 10:50:06,651 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 10:50:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 10:50:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 10:50:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:50:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:50:06,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:50:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:50:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-26 10:50:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-26 10:50:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-26 10:50:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-26 10:50:06,656 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:50:06,835 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:50:06,838 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:50:07,310 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:50:07,642 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:50:07,642 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 10:50:07,643 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:50:07 BoogieIcfgContainer [2023-11-26 10:50:07,643 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:50:07,666 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:50:07,667 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:50:07,670 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:50:07,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:50:05" (1/3) ... [2023-11-26 10:50:07,671 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678d4e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:50:07, skipping insertion in model container [2023-11-26 10:50:07,671 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:06" (2/3) ... [2023-11-26 10:50:07,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678d4e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:50:07, skipping insertion in model container [2023-11-26 10:50:07,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:50:07" (3/3) ... [2023-11-26 10:50:07,674 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-11-26 10:50:07,696 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:50:07,696 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-26 10:50:07,696 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:50:07,774 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 10:50:07,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 58 transitions, 130 flow [2023-11-26 10:50:07,874 INFO L124 PetriNetUnfolderBase]: 5/56 cut-off events. [2023-11-26 10:50:07,874 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 10:50:07,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 56 events. 5/56 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 119 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2023-11-26 10:50:07,879 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 58 transitions, 130 flow [2023-11-26 10:50:07,886 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 122 flow [2023-11-26 10:50:07,904 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:50:07,914 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;@3f0efa3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:50:07,914 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-26 10:50:07,920 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:50:07,920 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-26 10:50:07,920 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:50:07,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:07,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:50:07,922 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:07,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:07,928 INFO L85 PathProgramCache]: Analyzing trace with hash 451072, now seen corresponding path program 1 times [2023-11-26 10:50:07,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:07,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682054441] [2023-11-26 10:50:07,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:07,945 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:07,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:07,952 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:07,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-26 10:50:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:08,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:50:08,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:08,174 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 [2023-11-26 10:50:08,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:08,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:50:08,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:08,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:50:08,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:08,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 10:50:08,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:08,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 10:50:08,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:08,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:50:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:08,291 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:08,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:08,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682054441] [2023-11-26 10:50:08,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682054441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:08,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:08,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:50:08,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051830501] [2023-11-26 10:50:08,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:08,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:08,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:08,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:08,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:08,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 58 [2023-11-26 10:50:08,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:08,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:08,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 58 [2023-11-26 10:50:08,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:08,762 INFO L124 PetriNetUnfolderBase]: 215/410 cut-off events. [2023-11-26 10:50:08,763 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-26 10:50:08,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 773 conditions, 410 events. 215/410 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1909 event pairs, 141 based on Foata normal form. 10/289 useless extension candidates. Maximal degree in co-relation 674. Up to 333 conditions per place. [2023-11-26 10:50:08,775 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 25 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-11-26 10:50:08,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 51 transitions, 168 flow [2023-11-26 10:50:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:08,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:50:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2023-11-26 10:50:08,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6379310344827587 [2023-11-26 10:50:08,792 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2023-11-26 10:50:08,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2023-11-26 10:50:08,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:08,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2023-11-26 10:50:08,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:08,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:08,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:08,812 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 122 flow. Second operand 3 states and 111 transitions. [2023-11-26 10:50:08,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 51 transitions, 168 flow [2023-11-26 10:50:08,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 160 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 10:50:08,824 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 110 flow [2023-11-26 10:50:08,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-11-26 10:50:08,830 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2023-11-26 10:50:08,831 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 110 flow [2023-11-26 10:50:08,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:08,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:08,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:50:08,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-26 10:50:09,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:09,036 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:09,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:09,038 INFO L85 PathProgramCache]: Analyzing trace with hash 451073, now seen corresponding path program 1 times [2023-11-26 10:50:09,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:09,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143257006] [2023-11-26 10:50:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:09,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:09,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:09,044 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:09,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-26 10:50:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:09,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:50:09,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:09,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-26 10:50:09,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:09,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:50:09,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:09,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:50:09,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:09,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:50:09,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:09,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:50:09,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:09,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:50:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:09,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:09,359 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:09,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143257006] [2023-11-26 10:50:09,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143257006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:09,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:09,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:50:09,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461215459] [2023-11-26 10:50:09,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:09,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:50:09,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:09,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:50:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:50:09,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 58 [2023-11-26 10:50:09,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:09,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:09,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 58 [2023-11-26 10:50:09,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:09,934 INFO L124 PetriNetUnfolderBase]: 216/413 cut-off events. [2023-11-26 10:50:09,934 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-26 10:50:09,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 413 events. 216/413 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1922 event pairs, 141 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 741. Up to 338 conditions per place. [2023-11-26 10:50:09,939 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 27 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-11-26 10:50:09,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 180 flow [2023-11-26 10:50:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:50:09,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:50:09,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 140 transitions. [2023-11-26 10:50:09,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2023-11-26 10:50:09,942 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 140 transitions. [2023-11-26 10:50:09,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 140 transitions. [2023-11-26 10:50:09,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:09,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 140 transitions. [2023-11-26 10:50:09,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:09,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:09,947 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:09,947 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 110 flow. Second operand 4 states and 140 transitions. [2023-11-26 10:50:09,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 180 flow [2023-11-26 10:50:09,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 54 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:50:09,950 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 133 flow [2023-11-26 10:50:09,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-11-26 10:50:09,951 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-11-26 10:50:09,952 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 133 flow [2023-11-26 10:50:09,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:09,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:09,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:50:09,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:10,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:10,155 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:10,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:10,156 INFO L85 PathProgramCache]: Analyzing trace with hash 451113, now seen corresponding path program 1 times [2023-11-26 10:50:10,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:10,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825203039] [2023-11-26 10:50:10,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:10,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:10,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:10,158 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:10,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-26 10:50:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:10,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:50:10,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:10,312 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 10:50:10,312 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 19 treesize of output 22 [2023-11-26 10:50:10,351 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-26 10:50:10,351 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 24 treesize of output 22 [2023-11-26 10:50:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:10,420 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:10,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:10,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825203039] [2023-11-26 10:50:10,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825203039] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:10,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:10,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:50:10,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324044800] [2023-11-26 10:50:10,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:10,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:10,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:10,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:10,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:10,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 58 [2023-11-26 10:50:10,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:10,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:10,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 58 [2023-11-26 10:50:10,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:10,743 INFO L124 PetriNetUnfolderBase]: 337/628 cut-off events. [2023-11-26 10:50:10,743 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-26 10:50:10,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1157 conditions, 628 events. 337/628 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3105 event pairs, 228 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 1133. Up to 508 conditions per place. [2023-11-26 10:50:10,749 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 31 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-11-26 10:50:10,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 193 flow [2023-11-26 10:50:10,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:50:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2023-11-26 10:50:10,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5919540229885057 [2023-11-26 10:50:10,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 103 transitions. [2023-11-26 10:50:10,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 103 transitions. [2023-11-26 10:50:10,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:10,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 103 transitions. [2023-11-26 10:50:10,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:10,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:10,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:10,756 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 133 flow. Second operand 3 states and 103 transitions. [2023-11-26 10:50:10,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 193 flow [2023-11-26 10:50:10,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:50:10,759 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 128 flow [2023-11-26 10:50:10,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2023-11-26 10:50:10,760 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-11-26 10:50:10,760 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 128 flow [2023-11-26 10:50:10,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:10,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:10,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:50:10,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:10,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:10,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:10,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:10,964 INFO L85 PathProgramCache]: Analyzing trace with hash 451114, now seen corresponding path program 1 times [2023-11-26 10:50:10,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:10,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190158339] [2023-11-26 10:50:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:10,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:10,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:10,967 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:10,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-26 10:50:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:11,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:50:11,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:11,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:11,092 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 5 [2023-11-26 10:50:11,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:11,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 10:50:11,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:11,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:11,159 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 5 [2023-11-26 10:50:11,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-26 10:50:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:11,326 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:11,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:11,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190158339] [2023-11-26 10:50:11,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190158339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:11,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:11,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:50:11,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673448272] [2023-11-26 10:50:11,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:11,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:11,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:11,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:11,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:11,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2023-11-26 10:50:11,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:11,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:11,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2023-11-26 10:50:11,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:11,706 INFO L124 PetriNetUnfolderBase]: 216/405 cut-off events. [2023-11-26 10:50:11,707 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-26 10:50:11,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 405 events. 216/405 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 1873 event pairs, 141 based on Foata normal form. 53/335 useless extension candidates. Maximal degree in co-relation 754. Up to 338 conditions per place. [2023-11-26 10:50:11,713 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 29 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-26 10:50:11,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 184 flow [2023-11-26 10:50:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:50:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2023-11-26 10:50:11,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149425287356322 [2023-11-26 10:50:11,718 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2023-11-26 10:50:11,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2023-11-26 10:50:11,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:11,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2023-11-26 10:50:11,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:11,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:11,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:11,721 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 128 flow. Second operand 3 states and 107 transitions. [2023-11-26 10:50:11,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 184 flow [2023-11-26 10:50:11,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:50:11,724 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 125 flow [2023-11-26 10:50:11,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-11-26 10:50:11,727 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-11-26 10:50:11,727 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 125 flow [2023-11-26 10:50:11,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:11,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:11,728 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-26 10:50:11,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-26 10:50:11,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:11,931 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:11,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:11,931 INFO L85 PathProgramCache]: Analyzing trace with hash 433495932, now seen corresponding path program 1 times [2023-11-26 10:50:11,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:11,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321297062] [2023-11-26 10:50:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:11,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:11,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:11,935 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:11,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-26 10:50:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:12,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:50:12,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:12,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-26 10:50:12,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:12,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:50:12,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:12,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:50:12,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:12,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:50:12,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:12,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:50:12,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:12,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:50:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:12,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:50:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:12,853 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:12,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321297062] [2023-11-26 10:50:12,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321297062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:50:12,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:50:12,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-26 10:50:12,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288247627] [2023-11-26 10:50:12,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:50:12,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:50:12,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:12,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:50:12,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:50:13,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 58 [2023-11-26 10:50:13,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 125 flow. Second operand has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:13,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:13,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 58 [2023-11-26 10:50:13,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:14,786 INFO L124 PetriNetUnfolderBase]: 219/414 cut-off events. [2023-11-26 10:50:14,786 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-26 10:50:14,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 414 events. 219/414 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 1918 event pairs, 141 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 782. Up to 341 conditions per place. [2023-11-26 10:50:14,791 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 27 selfloop transitions, 13 changer transitions 0/59 dead transitions. [2023-11-26 10:50:14,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 59 transitions, 241 flow [2023-11-26 10:50:14,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:50:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 10:50:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 313 transitions. [2023-11-26 10:50:14,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396551724137931 [2023-11-26 10:50:14,794 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 313 transitions. [2023-11-26 10:50:14,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 313 transitions. [2023-11-26 10:50:14,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:14,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 313 transitions. [2023-11-26 10:50:14,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 31.3) internal successors, (313), 10 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:14,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:14,799 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:14,800 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 125 flow. Second operand 10 states and 313 transitions. [2023-11-26 10:50:14,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 59 transitions, 241 flow [2023-11-26 10:50:14,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:50:14,803 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 204 flow [2023-11-26 10:50:14,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=204, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-11-26 10:50:14,804 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2023-11-26 10:50:14,805 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 204 flow [2023-11-26 10:50:14,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:14,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:14,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 10:50:14,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:15,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:15,009 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:15,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:15,010 INFO L85 PathProgramCache]: Analyzing trace with hash 554655022, now seen corresponding path program 1 times [2023-11-26 10:50:15,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:15,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409679286] [2023-11-26 10:50:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:15,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:15,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:15,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:15,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-26 10:50:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:15,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:50:15,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:15,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:15,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-26 10:50:15,141 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 [2023-11-26 10:50:15,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:15,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:15,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:50:15,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:15,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:15,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:50:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:15,205 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:15,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:15,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409679286] [2023-11-26 10:50:15,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409679286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:15,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:15,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:50:15,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989121091] [2023-11-26 10:50:15,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:15,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:15,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:15,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:15,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:15,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2023-11-26 10:50:15,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:15,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:15,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2023-11-26 10:50:15,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:15,432 INFO L124 PetriNetUnfolderBase]: 219/410 cut-off events. [2023-11-26 10:50:15,432 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-26 10:50:15,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 410 events. 219/410 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1869 event pairs, 141 based on Foata normal form. 16/307 useless extension candidates. Maximal degree in co-relation 798. Up to 347 conditions per place. [2023-11-26 10:50:15,437 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 38 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-11-26 10:50:15,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 278 flow [2023-11-26 10:50:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:15,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:50:15,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2023-11-26 10:50:15,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149425287356322 [2023-11-26 10:50:15,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2023-11-26 10:50:15,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2023-11-26 10:50:15,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:15,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2023-11-26 10:50:15,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:15,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:15,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:15,441 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 204 flow. Second operand 3 states and 107 transitions. [2023-11-26 10:50:15,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 278 flow [2023-11-26 10:50:15,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 57 transitions, 248 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-26 10:50:15,448 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 172 flow [2023-11-26 10:50:15,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-11-26 10:50:15,452 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2023-11-26 10:50:15,452 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 172 flow [2023-11-26 10:50:15,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:15,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:15,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 10:50:15,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:15,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:15,655 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:15,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:15,656 INFO L85 PathProgramCache]: Analyzing trace with hash 554655021, now seen corresponding path program 1 times [2023-11-26 10:50:15,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:15,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779657437] [2023-11-26 10:50:15,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:15,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:15,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:15,659 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:15,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-26 10:50:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:15,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:50:15,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:15,780 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 10:50:15,780 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 14 treesize of output 15 [2023-11-26 10:50:15,806 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 10:50:15,806 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-26 10:50:15,826 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 10:50:15,827 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-26 10:50:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:15,921 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:15,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:15,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779657437] [2023-11-26 10:50:15,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779657437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:15,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:15,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:50:15,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364891973] [2023-11-26 10:50:15,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:15,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:15,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:15,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:15,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:15,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 58 [2023-11-26 10:50:15,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:15,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:15,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 58 [2023-11-26 10:50:15,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:16,175 INFO L124 PetriNetUnfolderBase]: 238/442 cut-off events. [2023-11-26 10:50:16,175 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-26 10:50:16,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 442 events. 238/442 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2020 event pairs, 156 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 851. Up to 382 conditions per place. [2023-11-26 10:50:16,180 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 40 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-11-26 10:50:16,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 250 flow [2023-11-26 10:50:16,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:50:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2023-11-26 10:50:16,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5919540229885057 [2023-11-26 10:50:16,182 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 103 transitions. [2023-11-26 10:50:16,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 103 transitions. [2023-11-26 10:50:16,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:16,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 103 transitions. [2023-11-26 10:50:16,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:16,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:16,184 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:16,184 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 172 flow. Second operand 3 states and 103 transitions. [2023-11-26 10:50:16,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 250 flow [2023-11-26 10:50:16,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:50:16,187 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 169 flow [2023-11-26 10:50:16,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2023-11-26 10:50:16,188 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-11-26 10:50:16,189 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 169 flow [2023-11-26 10:50:16,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:16,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:16,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:16,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:16,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:16,392 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:16,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:16,393 INFO L85 PathProgramCache]: Analyzing trace with hash 447898751, now seen corresponding path program 1 times [2023-11-26 10:50:16,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:16,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065890147] [2023-11-26 10:50:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:16,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:16,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:16,394 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:16,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-26 10:50:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:16,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:50:16,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:16,517 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:16,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:16,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065890147] [2023-11-26 10:50:16,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065890147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:16,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:16,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:16,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758201351] [2023-11-26 10:50:16,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:16,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:50:16,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:16,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:50:16,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:50:16,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2023-11-26 10:50:16,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:16,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:16,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2023-11-26 10:50:16,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:16,944 INFO L124 PetriNetUnfolderBase]: 335/672 cut-off events. [2023-11-26 10:50:16,944 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-26 10:50:16,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1296 conditions, 672 events. 335/672 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3271 event pairs, 71 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 1281. Up to 233 conditions per place. [2023-11-26 10:50:16,951 INFO L140 encePairwiseOnDemand]: 52/58 looper letters, 82 selfloop transitions, 7 changer transitions 0/103 dead transitions. [2023-11-26 10:50:16,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 103 transitions, 446 flow [2023-11-26 10:50:16,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:50:16,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:50:16,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 209 transitions. [2023-11-26 10:50:16,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7206896551724138 [2023-11-26 10:50:16,953 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 209 transitions. [2023-11-26 10:50:16,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 209 transitions. [2023-11-26 10:50:16,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:16,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 209 transitions. [2023-11-26 10:50:16,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:16,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 58.0) internal successors, (348), 6 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:16,956 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 58.0) internal successors, (348), 6 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:16,956 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 169 flow. Second operand 5 states and 209 transitions. [2023-11-26 10:50:16,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 103 transitions, 446 flow [2023-11-26 10:50:16,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 103 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:50:16,966 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 224 flow [2023-11-26 10:50:16,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-11-26 10:50:16,970 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-11-26 10:50:16,970 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 224 flow [2023-11-26 10:50:16,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:16,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:16,971 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-26 10:50:16,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:17,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:17,175 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:17,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:17,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1375213715, now seen corresponding path program 2 times [2023-11-26 10:50:17,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:17,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717493603] [2023-11-26 10:50:17,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:50:17,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:17,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:17,178 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:17,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-26 10:50:17,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:50:17,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:50:17,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 10:50:17,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:17,303 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 [2023-11-26 10:50:17,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:17,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:50:17,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:17,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:50:17,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:17,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:50:17,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:17,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:50:17,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:17,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:50:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:17,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:50:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:18,733 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:18,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717493603] [2023-11-26 10:50:18,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717493603] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:50:18,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:50:18,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-26 10:50:18,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407983314] [2023-11-26 10:50:18,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:50:18,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:50:18,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:18,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:50:18,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:50:21,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 58 [2023-11-26 10:50:21,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 224 flow. Second operand has 14 states, 14 states have (on average 28.571428571428573) internal successors, (400), 14 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:21,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:21,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 58 [2023-11-26 10:50:21,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:24,976 INFO L124 PetriNetUnfolderBase]: 294/627 cut-off events. [2023-11-26 10:50:24,976 INFO L125 PetriNetUnfolderBase]: For 438/466 co-relation queries the response was YES. [2023-11-26 10:50:24,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1501 conditions, 627 events. 294/627 cut-off events. For 438/466 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3275 event pairs, 186 based on Foata normal form. 34/534 useless extension candidates. Maximal degree in co-relation 1481. Up to 486 conditions per place. [2023-11-26 10:50:24,983 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 32 selfloop transitions, 31 changer transitions 0/79 dead transitions. [2023-11-26 10:50:24,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 79 transitions, 434 flow [2023-11-26 10:50:24,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-26 10:50:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-26 10:50:24,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 658 transitions. [2023-11-26 10:50:24,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156739811912225 [2023-11-26 10:50:24,988 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 658 transitions. [2023-11-26 10:50:24,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 658 transitions. [2023-11-26 10:50:24,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:24,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 658 transitions. [2023-11-26 10:50:24,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 29.90909090909091) internal successors, (658), 22 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:24,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 58.0) internal successors, (1334), 23 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:24,996 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 58.0) internal successors, (1334), 23 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:24,996 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 224 flow. Second operand 22 states and 658 transitions. [2023-11-26 10:50:24,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 79 transitions, 434 flow [2023-11-26 10:50:24,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 79 transitions, 434 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:50:25,001 INFO L231 Difference]: Finished difference. Result has 94 places, 79 transitions, 400 flow [2023-11-26 10:50:25,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=400, PETRI_PLACES=94, PETRI_TRANSITIONS=79} [2023-11-26 10:50:25,002 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2023-11-26 10:50:25,002 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 79 transitions, 400 flow [2023-11-26 10:50:25,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.571428571428573) internal successors, (400), 14 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:25,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:25,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:25,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-26 10:50:25,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:25,206 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:25,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:25,206 INFO L85 PathProgramCache]: Analyzing trace with hash -771289123, now seen corresponding path program 1 times [2023-11-26 10:50:25,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:25,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890421563] [2023-11-26 10:50:25,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:25,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:25,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:25,209 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:25,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-26 10:50:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:25,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:50:25,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:25,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:25,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:25,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890421563] [2023-11-26 10:50:25,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890421563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:25,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:25,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:25,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586617309] [2023-11-26 10:50:25,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:25,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:25,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:25,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:25,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:25,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2023-11-26 10:50:25,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 79 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:25,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:25,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2023-11-26 10:50:25,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:25,612 INFO L124 PetriNetUnfolderBase]: 324/632 cut-off events. [2023-11-26 10:50:25,612 INFO L125 PetriNetUnfolderBase]: For 484/504 co-relation queries the response was YES. [2023-11-26 10:50:25,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1632 conditions, 632 events. 324/632 cut-off events. For 484/504 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3091 event pairs, 157 based on Foata normal form. 25/571 useless extension candidates. Maximal degree in co-relation 1604. Up to 448 conditions per place. [2023-11-26 10:50:25,620 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 76 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-26 10:50:25,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 93 transitions, 588 flow [2023-11-26 10:50:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:50:25,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2023-11-26 10:50:25,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7126436781609196 [2023-11-26 10:50:25,622 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 124 transitions. [2023-11-26 10:50:25,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 124 transitions. [2023-11-26 10:50:25,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:25,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 124 transitions. [2023-11-26 10:50:25,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:25,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:25,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:25,626 INFO L175 Difference]: Start difference. First operand has 94 places, 79 transitions, 400 flow. Second operand 3 states and 124 transitions. [2023-11-26 10:50:25,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 93 transitions, 588 flow [2023-11-26 10:50:25,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 93 transitions, 508 flow, removed 27 selfloop flow, removed 9 redundant places. [2023-11-26 10:50:25,635 INFO L231 Difference]: Finished difference. Result has 88 places, 78 transitions, 320 flow [2023-11-26 10:50:25,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=88, PETRI_TRANSITIONS=78} [2023-11-26 10:50:25,637 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2023-11-26 10:50:25,637 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 78 transitions, 320 flow [2023-11-26 10:50:25,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:25,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:25,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:25,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-11-26 10:50:25,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:25,841 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:25,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:25,842 INFO L85 PathProgramCache]: Analyzing trace with hash -771289157, now seen corresponding path program 1 times [2023-11-26 10:50:25,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:25,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769247896] [2023-11-26 10:50:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:25,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:25,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:25,844 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:25,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-26 10:50:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:26,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:50:26,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:26,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-26 10:50:26,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:26,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:50:26,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:26,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:50:26,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:26,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-26 10:50:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:26,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 10:50:26,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:26,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:50:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:26,144 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:26,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:26,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769247896] [2023-11-26 10:50:26,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769247896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:26,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:26,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:50:26,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114848715] [2023-11-26 10:50:26,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:26,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:50:26,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:26,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:50:26,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:50:26,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2023-11-26 10:50:26,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 78 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:26,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:26,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2023-11-26 10:50:26,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:26,499 INFO L124 PetriNetUnfolderBase]: 243/514 cut-off events. [2023-11-26 10:50:26,499 INFO L125 PetriNetUnfolderBase]: For 386/404 co-relation queries the response was YES. [2023-11-26 10:50:26,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1297 conditions, 514 events. 243/514 cut-off events. For 386/404 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2483 event pairs, 156 based on Foata normal form. 18/482 useless extension candidates. Maximal degree in co-relation 1269. Up to 390 conditions per place. [2023-11-26 10:50:26,505 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 46 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2023-11-26 10:50:26,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 75 transitions, 430 flow [2023-11-26 10:50:26,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:50:26,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:50:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2023-11-26 10:50:26,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2023-11-26 10:50:26,508 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 132 transitions. [2023-11-26 10:50:26,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 132 transitions. [2023-11-26 10:50:26,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:26,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 132 transitions. [2023-11-26 10:50:26,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:26,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:26,510 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:26,511 INFO L175 Difference]: Start difference. First operand has 88 places, 78 transitions, 320 flow. Second operand 4 states and 132 transitions. [2023-11-26 10:50:26,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 75 transitions, 430 flow [2023-11-26 10:50:26,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 75 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:50:26,516 INFO L231 Difference]: Finished difference. Result has 87 places, 75 transitions, 336 flow [2023-11-26 10:50:26,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=87, PETRI_TRANSITIONS=75} [2023-11-26 10:50:26,517 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2023-11-26 10:50:26,517 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 75 transitions, 336 flow [2023-11-26 10:50:26,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:26,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:26,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:26,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:26,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:26,721 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:26,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:26,721 INFO L85 PathProgramCache]: Analyzing trace with hash -771289156, now seen corresponding path program 1 times [2023-11-26 10:50:26,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:26,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779316307] [2023-11-26 10:50:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:26,722 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:26,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:26,723 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:26,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-26 10:50:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:26,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:50:26,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:26,936 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:26,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:26,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779316307] [2023-11-26 10:50:26,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779316307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:26,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:26,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:26,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377393719] [2023-11-26 10:50:26,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:26,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:50:26,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:26,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:50:26,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:50:26,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2023-11-26 10:50:26,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 75 transitions, 336 flow. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:26,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:26,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2023-11-26 10:50:26,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:27,243 INFO L124 PetriNetUnfolderBase]: 265/583 cut-off events. [2023-11-26 10:50:27,243 INFO L125 PetriNetUnfolderBase]: For 409/437 co-relation queries the response was YES. [2023-11-26 10:50:27,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1447 conditions, 583 events. 265/583 cut-off events. For 409/437 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2942 event pairs, 179 based on Foata normal form. 33/561 useless extension candidates. Maximal degree in co-relation 1418. Up to 411 conditions per place. [2023-11-26 10:50:27,249 INFO L140 encePairwiseOnDemand]: 54/58 looper letters, 66 selfloop transitions, 3 changer transitions 1/87 dead transitions. [2023-11-26 10:50:27,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 87 transitions, 508 flow [2023-11-26 10:50:27,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:50:27,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:50:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2023-11-26 10:50:27,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594827586206896 [2023-11-26 10:50:27,252 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 153 transitions. [2023-11-26 10:50:27,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 153 transitions. [2023-11-26 10:50:27,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:27,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 153 transitions. [2023-11-26 10:50:27,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:27,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:27,255 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:27,255 INFO L175 Difference]: Start difference. First operand has 87 places, 75 transitions, 336 flow. Second operand 4 states and 153 transitions. [2023-11-26 10:50:27,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 87 transitions, 508 flow [2023-11-26 10:50:27,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 495 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:50:27,261 INFO L231 Difference]: Finished difference. Result has 89 places, 75 transitions, 332 flow [2023-11-26 10:50:27,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2023-11-26 10:50:27,262 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2023-11-26 10:50:27,262 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 332 flow [2023-11-26 10:50:27,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:27,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:27,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:27,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-26 10:50:27,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:27,466 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:27,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:27,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1762627721, now seen corresponding path program 1 times [2023-11-26 10:50:27,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:27,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376798863] [2023-11-26 10:50:27,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:27,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:27,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:27,469 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:27,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-26 10:50:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:27,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 10:50:27,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:27,618 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 [2023-11-26 10:50:27,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:27,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:50:27,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:27,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:50:27,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:27,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:50:27,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:27,682 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 [2023-11-26 10:50:27,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:27,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:50:28,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:28,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:50:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:29,508 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:29,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376798863] [2023-11-26 10:50:29,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376798863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:50:29,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:50:29,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-26 10:50:29,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116398998] [2023-11-26 10:50:29,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:50:29,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:50:29,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:29,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:50:29,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:50:32,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 58 [2023-11-26 10:50:32,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 332 flow. Second operand has 12 states, 12 states have (on average 28.833333333333332) internal successors, (346), 12 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:32,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:32,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 58 [2023-11-26 10:50:32,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:36,414 INFO L124 PetriNetUnfolderBase]: 645/1373 cut-off events. [2023-11-26 10:50:36,414 INFO L125 PetriNetUnfolderBase]: For 945/1005 co-relation queries the response was YES. [2023-11-26 10:50:36,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3409 conditions, 1373 events. 645/1373 cut-off events. For 945/1005 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8389 event pairs, 312 based on Foata normal form. 60/1335 useless extension candidates. Maximal degree in co-relation 3379. Up to 327 conditions per place. [2023-11-26 10:50:36,430 INFO L140 encePairwiseOnDemand]: 47/58 looper letters, 92 selfloop transitions, 40 changer transitions 1/149 dead transitions. [2023-11-26 10:50:36,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 149 transitions, 855 flow [2023-11-26 10:50:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:50:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 10:50:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 457 transitions. [2023-11-26 10:50:36,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6061007957559682 [2023-11-26 10:50:36,435 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 457 transitions. [2023-11-26 10:50:36,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 457 transitions. [2023-11-26 10:50:36,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:36,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 457 transitions. [2023-11-26 10:50:36,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 35.15384615384615) internal successors, (457), 13 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:36,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 58.0) internal successors, (812), 14 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:36,443 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 58.0) internal successors, (812), 14 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:36,443 INFO L175 Difference]: Start difference. First operand has 89 places, 75 transitions, 332 flow. Second operand 13 states and 457 transitions. [2023-11-26 10:50:36,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 149 transitions, 855 flow [2023-11-26 10:50:36,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 149 transitions, 850 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:50:36,451 INFO L231 Difference]: Finished difference. Result has 102 places, 87 transitions, 513 flow [2023-11-26 10:50:36,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=513, PETRI_PLACES=102, PETRI_TRANSITIONS=87} [2023-11-26 10:50:36,452 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 45 predicate places. [2023-11-26 10:50:36,452 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 87 transitions, 513 flow [2023-11-26 10:50:36,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 28.833333333333332) internal successors, (346), 12 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:36,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:36,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:36,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:36,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:36,656 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:36,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:36,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1863836630, now seen corresponding path program 1 times [2023-11-26 10:50:36,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:36,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663741678] [2023-11-26 10:50:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:36,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:36,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:36,658 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:36,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-26 10:50:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:36,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 10:50:36,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:36,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-26 10:50:36,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:36,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:50:36,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:36,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:50:36,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:36,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:50:36,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:36,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:50:36,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:36,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:50:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:37,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:50:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:38,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:38,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663741678] [2023-11-26 10:50:38,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663741678] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:50:38,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:50:38,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-26 10:50:38,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705117550] [2023-11-26 10:50:38,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:50:38,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:50:38,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:38,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:50:38,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:50:40,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2023-11-26 10:50:40,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 87 transitions, 513 flow. Second operand has 12 states, 12 states have (on average 28.333333333333332) internal successors, (340), 12 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:40,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:40,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2023-11-26 10:50:40,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:43,775 INFO L124 PetriNetUnfolderBase]: 922/1911 cut-off events. [2023-11-26 10:50:43,775 INFO L125 PetriNetUnfolderBase]: For 1924/1984 co-relation queries the response was YES. [2023-11-26 10:50:43,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5288 conditions, 1911 events. 922/1911 cut-off events. For 1924/1984 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12478 event pairs, 367 based on Foata normal form. 60/1811 useless extension candidates. Maximal degree in co-relation 5255. Up to 863 conditions per place. [2023-11-26 10:50:43,796 INFO L140 encePairwiseOnDemand]: 49/58 looper letters, 128 selfloop transitions, 33 changer transitions 1/177 dead transitions. [2023-11-26 10:50:43,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 177 transitions, 1161 flow [2023-11-26 10:50:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:50:43,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-26 10:50:43,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 493 transitions. [2023-11-26 10:50:43,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2023-11-26 10:50:43,801 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 493 transitions. [2023-11-26 10:50:43,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 493 transitions. [2023-11-26 10:50:43,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:43,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 493 transitions. [2023-11-26 10:50:43,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 35.214285714285715) internal successors, (493), 14 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:43,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:43,806 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:43,806 INFO L175 Difference]: Start difference. First operand has 102 places, 87 transitions, 513 flow. Second operand 14 states and 493 transitions. [2023-11-26 10:50:43,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 177 transitions, 1161 flow [2023-11-26 10:50:43,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 177 transitions, 1133 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-26 10:50:43,816 INFO L231 Difference]: Finished difference. Result has 115 places, 94 transitions, 626 flow [2023-11-26 10:50:43,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=626, PETRI_PLACES=115, PETRI_TRANSITIONS=94} [2023-11-26 10:50:43,817 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 58 predicate places. [2023-11-26 10:50:43,817 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 94 transitions, 626 flow [2023-11-26 10:50:43,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 28.333333333333332) internal successors, (340), 12 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:43,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:43,818 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:43,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:44,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:44,021 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:44,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:44,022 INFO L85 PathProgramCache]: Analyzing trace with hash -87998936, now seen corresponding path program 2 times [2023-11-26 10:50:44,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:44,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126411450] [2023-11-26 10:50:44,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:50:44,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:44,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:44,023 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:44,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-26 10:50:44,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 10:50:44,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:50:44,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 10:50:44,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:44,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-26 10:50:44,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:44,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:50:44,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:44,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:50:44,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:44,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:50:44,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:44,212 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 13 treesize of output 1 [2023-11-26 10:50:44,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:50:44,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:50:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 10:50:44,509 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:44,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:44,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126411450] [2023-11-26 10:50:44,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126411450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:44,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:44,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:44,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766617207] [2023-11-26 10:50:44,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:44,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:50:44,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:44,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:50:44,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:50:44,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2023-11-26 10:50:44,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 94 transitions, 626 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:44,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:44,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2023-11-26 10:50:44,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:45,445 INFO L124 PetriNetUnfolderBase]: 803/1733 cut-off events. [2023-11-26 10:50:45,446 INFO L125 PetriNetUnfolderBase]: For 2155/2213 co-relation queries the response was YES. [2023-11-26 10:50:45,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5087 conditions, 1733 events. 803/1733 cut-off events. For 2155/2213 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11507 event pairs, 353 based on Foata normal form. 85/1711 useless extension candidates. Maximal degree in co-relation 5049. Up to 905 conditions per place. [2023-11-26 10:50:45,465 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 53 selfloop transitions, 31 changer transitions 0/101 dead transitions. [2023-11-26 10:50:45,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 101 transitions, 822 flow [2023-11-26 10:50:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:50:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:50:45,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2023-11-26 10:50:45,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2023-11-26 10:50:45,471 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 170 transitions. [2023-11-26 10:50:45,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 170 transitions. [2023-11-26 10:50:45,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:45,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 170 transitions. [2023-11-26 10:50:45,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:45,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 58.0) internal successors, (348), 6 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:45,475 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 58.0) internal successors, (348), 6 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:45,475 INFO L175 Difference]: Start difference. First operand has 115 places, 94 transitions, 626 flow. Second operand 5 states and 170 transitions. [2023-11-26 10:50:45,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 101 transitions, 822 flow [2023-11-26 10:50:45,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 101 transitions, 780 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-26 10:50:45,489 INFO L231 Difference]: Finished difference. Result has 110 places, 92 transitions, 634 flow [2023-11-26 10:50:45,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=634, PETRI_PLACES=110, PETRI_TRANSITIONS=92} [2023-11-26 10:50:45,491 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 53 predicate places. [2023-11-26 10:50:45,491 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 92 transitions, 634 flow [2023-11-26 10:50:45,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:45,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:45,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:45,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:45,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:45,694 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:45,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:45,695 INFO L85 PathProgramCache]: Analyzing trace with hash -649880547, now seen corresponding path program 1 times [2023-11-26 10:50:45,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:45,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772767989] [2023-11-26 10:50:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:45,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:45,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:45,696 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:45,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-26 10:50:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:45,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:50:45,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:45,842 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:45,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:45,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772767989] [2023-11-26 10:50:45,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772767989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:45,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:45,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:50:45,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068967896] [2023-11-26 10:50:45,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:45,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:45,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:45,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:45,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:45,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2023-11-26 10:50:45,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 92 transitions, 634 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:45,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:45,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2023-11-26 10:50:45,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:50:46,304 INFO L124 PetriNetUnfolderBase]: 852/1859 cut-off events. [2023-11-26 10:50:46,304 INFO L125 PetriNetUnfolderBase]: For 2991/3049 co-relation queries the response was YES. [2023-11-26 10:50:46,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5571 conditions, 1859 events. 852/1859 cut-off events. For 2991/3049 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12333 event pairs, 399 based on Foata normal form. 66/1815 useless extension candidates. Maximal degree in co-relation 5534. Up to 965 conditions per place. [2023-11-26 10:50:46,323 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 85 selfloop transitions, 5 changer transitions 7/114 dead transitions. [2023-11-26 10:50:46,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 114 transitions, 964 flow [2023-11-26 10:50:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:46,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:50:46,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2023-11-26 10:50:46,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2023-11-26 10:50:46,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2023-11-26 10:50:46,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2023-11-26 10:50:46,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:50:46,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2023-11-26 10:50:46,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:46,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:46,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:46,329 INFO L175 Difference]: Start difference. First operand has 110 places, 92 transitions, 634 flow. Second operand 3 states and 122 transitions. [2023-11-26 10:50:46,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 114 transitions, 964 flow [2023-11-26 10:50:46,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 114 transitions, 884 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 10:50:46,375 INFO L231 Difference]: Finished difference. Result has 109 places, 88 transitions, 555 flow [2023-11-26 10:50:46,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=555, PETRI_PLACES=109, PETRI_TRANSITIONS=88} [2023-11-26 10:50:46,376 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 52 predicate places. [2023-11-26 10:50:46,376 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 88 transitions, 555 flow [2023-11-26 10:50:46,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:46,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:50:46,377 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:46,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:46,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:46,578 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-26 10:50:46,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:46,578 INFO L85 PathProgramCache]: Analyzing trace with hash -219353242, now seen corresponding path program 1 times [2023-11-26 10:50:46,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:50:46,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840632445] [2023-11-26 10:50:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:46,579 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:50:46,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:50:46,582 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:50:46,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83ad1c32-6af4-4d32-902e-e996f40a734a/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-26 10:50:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:46,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 10:50:46,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:47,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:50:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:47,849 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:50:47,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840632445] [2023-11-26 10:50:47,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840632445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:50:47,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:50:47,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-26 10:50:47,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599560195] [2023-11-26 10:50:47,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:50:47,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:50:47,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:50:47,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:50:47,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:50:48,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2023-11-26 10:50:48,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 88 transitions, 555 flow. Second operand has 14 states, 14 states have (on average 30.142857142857142) internal successors, (422), 14 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:48,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:50:48,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2023-11-26 10:50:48,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand