./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:02:10,602 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:02:10,699 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:02:10,706 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:02:10,707 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:02:10,752 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:02:10,753 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:02:10,754 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:02:10,755 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:02:10,760 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:02:10,762 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:02:10,763 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:02:10,763 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:02:10,765 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:02:10,766 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:02:10,766 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:02:10,767 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:02:10,767 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:02:10,768 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:02:10,768 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:02:10,769 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:02:10,770 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:02:10,770 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:02:10,771 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:02:10,771 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:02:10,772 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:02:10,773 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:02:10,773 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:02:10,774 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:02:10,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:02:10,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:02:10,776 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:02:10,776 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:02:10,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:02:10,777 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:02:10,777 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:02:10,778 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:02:10,778 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:02:10,778 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_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2023-11-06 22:02:11,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:02:11,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:02:11,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:02:11,113 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:02:11,115 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:02:11,116 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-11-06 22:02:14,220 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:02:14,510 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:02:14,511 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-11-06 22:02:14,524 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/data/2bda7b0bb/d5ab1476cc6d4499a17ff8909def29c7/FLAG5dbd06652 [2023-11-06 22:02:14,555 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/data/2bda7b0bb/d5ab1476cc6d4499a17ff8909def29c7 [2023-11-06 22:02:14,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:02:14,566 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:02:14,570 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:02:14,571 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:02:14,577 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:02:14,581 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:14" (1/1) ... [2023-11-06 22:02:14,583 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f8fed2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:14, skipping insertion in model container [2023-11-06 22:02:14,583 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:14" (1/1) ... [2023-11-06 22:02:14,619 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:02:14,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:02:14,904 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-06 22:02:14,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@54893ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:14, skipping insertion in model container [2023-11-06 22:02:14,905 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:02:14,906 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 22:02:14,908 INFO L158 Benchmark]: Toolchain (without parser) took 341.15ms. Allocated memory is still 165.7MB. Free memory was 124.2MB in the beginning and 114.2MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:02:14,909 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory was 52.8MB in the beginning and 52.7MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:02:14,909 INFO L158 Benchmark]: CACSL2BoogieTranslator took 335.13ms. Allocated memory is still 165.7MB. Free memory was 124.2MB in the beginning and 114.2MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:02:14,911 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory was 52.8MB in the beginning and 52.7MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 335.13ms. Allocated memory is still 165.7MB. Free memory was 124.2MB in the beginning and 114.2MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 100]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:02:17,633 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:02:17,756 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 22:02:17,765 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:02:17,766 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:02:17,828 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:02:17,829 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:02:17,830 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:02:17,831 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:02:17,836 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:02:17,837 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:02:17,838 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:02:17,838 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:02:17,840 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:02:17,841 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:02:17,841 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:02:17,842 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:02:17,842 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:02:17,843 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:02:17,844 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:02:17,844 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:02:17,845 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:02:17,845 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:02:17,846 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:02:17,846 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:02:17,847 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:02:17,847 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:02:17,848 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:02:17,849 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:02:17,849 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:02:17,850 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:02:17,851 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:02:17,851 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:02:17,852 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:02:17,852 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:02:17,852 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:02:17,853 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:02:17,853 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:02:17,853 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:02:17,854 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:02:17,854 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:02:17,855 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_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2023-11-06 22:02:18,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:02:18,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:02:18,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:02:18,303 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:02:18,303 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:02:18,305 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-11-06 22:02:21,501 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:02:21,815 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:02:21,815 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-11-06 22:02:21,823 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/data/d1516b10a/17de6b4cfec34ae9baadb5eba7902f43/FLAG0ca8377ed [2023-11-06 22:02:21,841 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/data/d1516b10a/17de6b4cfec34ae9baadb5eba7902f43 [2023-11-06 22:02:21,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:02:21,845 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:02:21,846 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:02:21,847 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:02:21,851 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:02:21,852 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:21" (1/1) ... [2023-11-06 22:02:21,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c053b46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:21, skipping insertion in model container [2023-11-06 22:02:21,853 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:21" (1/1) ... [2023-11-06 22:02:21,882 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:02:22,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:02:22,152 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:02:22,164 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:02:22,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:02:22,221 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:02:22,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:02:22,297 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:02:22,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:22 WrapperNode [2023-11-06 22:02:22,299 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:02:22,304 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:02:22,305 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:02:22,305 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:02:22,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:22" (1/1) ... [2023-11-06 22:02:22,324 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:22" (1/1) ... [2023-11-06 22:02:22,371 INFO L138 Inliner]: procedures = 28, calls = 46, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 273 [2023-11-06 22:02:22,372 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:02:22,372 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:02:22,373 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:02:22,373 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:02:22,382 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:22" (1/1) ... [2023-11-06 22:02:22,383 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:22" (1/1) ... [2023-11-06 22:02:22,389 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:22" (1/1) ... [2023-11-06 22:02:22,390 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:22" (1/1) ... [2023-11-06 22:02:22,404 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:22" (1/1) ... [2023-11-06 22:02:22,410 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:22" (1/1) ... [2023-11-06 22:02:22,413 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:22" (1/1) ... [2023-11-06 22:02:22,416 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:22" (1/1) ... [2023-11-06 22:02:22,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:02:22,422 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:02:22,422 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:02:22,422 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:02:22,423 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:22" (1/1) ... [2023-11-06 22:02:22,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:02:22,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:22,483 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:02:22,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:02:22,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:02:22,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:02:22,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:02:22,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 22:02:22,523 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:02:22,523 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:02:22,523 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:02:22,523 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:02:22,523 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:02:22,523 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:02:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:02:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:02:22,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:02:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:02:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:02:22,526 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:02:22,657 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:02:22,659 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:02:23,568 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:02:23,580 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:02:23,581 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-06 22:02:23,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:02:23 BoogieIcfgContainer [2023-11-06 22:02:23,584 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:02:23,586 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:02:23,586 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:02:23,590 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:02:23,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:02:21" (1/3) ... [2023-11-06 22:02:23,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bdf7ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:02:23, skipping insertion in model container [2023-11-06 22:02:23,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:22" (2/3) ... [2023-11-06 22:02:23,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bdf7ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:02:23, skipping insertion in model container [2023-11-06 22:02:23,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:02:23" (3/3) ... [2023-11-06 22:02:23,593 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2023-11-06 22:02:23,614 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:02:23,614 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-11-06 22:02:23,614 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:02:23,819 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:02:23,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 402 transitions, 825 flow [2023-11-06 22:02:24,152 INFO L124 PetriNetUnfolderBase]: 29/399 cut-off events. [2023-11-06 22:02:24,152 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:02:24,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 399 events. 29/399 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 671 event pairs, 0 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 255. Up to 2 conditions per place. [2023-11-06 22:02:24,166 INFO L82 GeneralOperation]: Start removeDead. Operand has 383 places, 402 transitions, 825 flow [2023-11-06 22:02:24,180 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 375 places, 394 transitions, 806 flow [2023-11-06 22:02:24,184 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:02:24,196 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 375 places, 394 transitions, 806 flow [2023-11-06 22:02:24,200 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 375 places, 394 transitions, 806 flow [2023-11-06 22:02:24,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 394 transitions, 806 flow [2023-11-06 22:02:24,306 INFO L124 PetriNetUnfolderBase]: 29/394 cut-off events. [2023-11-06 22:02:24,306 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:02:24,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 394 events. 29/394 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 668 event pairs, 0 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 255. Up to 2 conditions per place. [2023-11-06 22:02:24,328 INFO L119 LiptonReduction]: Number of co-enabled transitions 21692 [2023-11-06 22:03:32,208 WARN L293 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 165 DAG size of output: 162 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-06 22:03:34,248 INFO L134 LiptonReduction]: Checked pairs total: 22469 [2023-11-06 22:03:34,248 INFO L136 LiptonReduction]: Total number of compositions: 481 [2023-11-06 22:03:34,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:03:34,270 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;@6059c38f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:03:34,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-11-06 22:03:34,274 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:03:34,274 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:03:34,274 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:03:34,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:34,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:03:34,276 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:03:34,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:34,282 INFO L85 PathProgramCache]: Analyzing trace with hash 51170, now seen corresponding path program 1 times [2023-11-06 22:03:34,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:03:34,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611746420] [2023-11-06 22:03:34,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:34,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:03:34,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:03:34,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:03:34,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-06 22:03:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:34,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:03:34,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:34,611 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-06 22:03:34,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,638 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:34,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,654 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:34,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,668 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,686 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:34,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,700 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:34,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,724 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:34,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,737 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:34,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,760 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:34,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,775 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:34,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,805 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:34,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,824 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:34,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,851 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:34,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,862 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:34,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,880 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:34,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:34,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,949 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:34,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,980 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:35,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:35,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:03:35,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:35,079 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:35,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:35,110 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:35,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:35,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:35,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:35,162 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:35,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:35,178 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:35,204 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:35,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:03:35,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611746420] [2023-11-06 22:03:35,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611746420] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:35,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:35,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:03:35,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361622892] [2023-11-06 22:03:35,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:35,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:35,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:03:35,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:35,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:35,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 883 [2023-11-06 22:03:35,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 351.6666666666667) internal successors, (1055), 3 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:35,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:35,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 883 [2023-11-06 22:03:35,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:37,562 INFO L124 PetriNetUnfolderBase]: 4992/6248 cut-off events. [2023-11-06 22:03:37,562 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2023-11-06 22:03:37,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12592 conditions, 6248 events. 4992/6248 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 26976 event pairs, 2410 based on Foata normal form. 0/1475 useless extension candidates. Maximal degree in co-relation 10696. Up to 6215 conditions per place. [2023-11-06 22:03:37,639 INFO L140 encePairwiseOnDemand]: 868/883 looper letters, 55 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2023-11-06 22:03:37,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 67 transitions, 280 flow [2023-11-06 22:03:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:37,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1123 transitions. [2023-11-06 22:03:37,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4239335598338996 [2023-11-06 22:03:37,682 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1123 transitions. [2023-11-06 22:03:37,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1123 transitions. [2023-11-06 22:03:37,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:37,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1123 transitions. [2023-11-06 22:03:37,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.3333333333333) internal successors, (1123), 3 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:37,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 883.0) internal successors, (3532), 4 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:37,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 883.0) internal successors, (3532), 4 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:37,766 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 136 flow. Second operand 3 states and 1123 transitions. [2023-11-06 22:03:37,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 67 transitions, 280 flow [2023-11-06 22:03:37,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 67 transitions, 268 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:03:37,792 INFO L231 Difference]: Finished difference. Result has 58 places, 64 transitions, 192 flow [2023-11-06 22:03:37,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=58, PETRI_TRANSITIONS=64} [2023-11-06 22:03:37,804 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -5 predicate places. [2023-11-06 22:03:37,804 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 64 transitions, 192 flow [2023-11-06 22:03:37,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 351.6666666666667) internal successors, (1055), 3 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:37,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:37,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:03:37,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:38,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:03:38,018 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:03:38,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:38,019 INFO L85 PathProgramCache]: Analyzing trace with hash 51171, now seen corresponding path program 1 times [2023-11-06 22:03:38,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:03:38,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518683007] [2023-11-06 22:03:38,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:38,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:03:38,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:03:38,021 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:03:38,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-06 22:03:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:38,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:03:38,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:38,130 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:03:38,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,142 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:03:38,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,154 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:03:38,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,160 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:03:38,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,172 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:03:38,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,190 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:03:38,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,209 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:03:38,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,225 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:03:38,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,255 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:03:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,273 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:03:38,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,285 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:03:38,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,302 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:03:38,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,314 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:03:38,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,320 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:03:38,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:03:38,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:03:38,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,355 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:03:38,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,365 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:03:38,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,386 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:03:38,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,430 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:03:38,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,437 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:03:38,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,446 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:03:38,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,453 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:03:38,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:38,462 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:03:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:38,468 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:38,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:03:38,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518683007] [2023-11-06 22:03:38,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518683007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:38,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:38,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:03:38,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589299639] [2023-11-06 22:03:38,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:38,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:38,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:03:38,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:38,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:38,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 354 out of 883 [2023-11-06 22:03:38,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 64 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:38,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:38,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 354 of 883 [2023-11-06 22:03:38,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:40,233 INFO L124 PetriNetUnfolderBase]: 4992/6242 cut-off events. [2023-11-06 22:03:40,234 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-06 22:03:40,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12522 conditions, 6242 events. 4992/6242 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 26969 event pairs, 2410 based on Foata normal form. 6/1485 useless extension candidates. Maximal degree in co-relation 12449. Up to 6203 conditions per place. [2023-11-06 22:03:40,292 INFO L140 encePairwiseOnDemand]: 876/883 looper letters, 51 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2023-11-06 22:03:40,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 61 transitions, 302 flow [2023-11-06 22:03:40,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:40,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1115 transitions. [2023-11-06 22:03:40,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4209135522838807 [2023-11-06 22:03:40,299 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1115 transitions. [2023-11-06 22:03:40,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1115 transitions. [2023-11-06 22:03:40,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:40,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1115 transitions. [2023-11-06 22:03:40,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:40,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 883.0) internal successors, (3532), 4 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:40,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 883.0) internal successors, (3532), 4 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:40,315 INFO L175 Difference]: Start difference. First operand has 58 places, 64 transitions, 192 flow. Second operand 3 states and 1115 transitions. [2023-11-06 22:03:40,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 61 transitions, 302 flow [2023-11-06 22:03:40,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:03:40,318 INFO L231 Difference]: Finished difference. Result has 55 places, 61 transitions, 182 flow [2023-11-06 22:03:40,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=55, PETRI_TRANSITIONS=61} [2023-11-06 22:03:40,319 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -8 predicate places. [2023-11-06 22:03:40,320 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 61 transitions, 182 flow [2023-11-06 22:03:40,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:40,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:40,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:03:40,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:40,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:03:40,532 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:03:40,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:40,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1592025, now seen corresponding path program 1 times [2023-11-06 22:03:40,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:03:40,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647017495] [2023-11-06 22:03:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:40,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:03:40,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:03:40,535 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:03:40,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-06 22:03:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:40,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:03:40,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:40,656 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 22:03:40,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,686 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:40,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,724 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:03:40,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:40,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,761 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:40,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,783 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:40,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,800 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:40,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,821 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:40,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:40,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,842 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:40,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,854 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:40,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,863 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:40,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,879 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:40,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,907 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:40,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:40,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,930 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:40,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,944 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:40,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,952 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:40,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,968 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:40,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,977 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:40,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,986 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:40,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:40,998 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:41,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:41,013 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:41,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:41,035 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:41,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:41,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:03:41,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647017495] [2023-11-06 22:03:41,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647017495] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:41,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:03:41,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 22:03:41,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896853162] [2023-11-06 22:03:41,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:41,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:03:41,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:03:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:03:41,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:03:42,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 883 [2023-11-06 22:03:42,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 61 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:42,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:42,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 883 [2023-11-06 22:03:42,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:45,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:03:47,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:03:49,565 INFO L124 PetriNetUnfolderBase]: 5007/6266 cut-off events. [2023-11-06 22:03:49,566 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-06 22:03:49,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12601 conditions, 6266 events. 5007/6266 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 27046 event pairs, 2410 based on Foata normal form. 0/1489 useless extension candidates. Maximal degree in co-relation 12449. Up to 6221 conditions per place. [2023-11-06 22:03:49,621 INFO L140 encePairwiseOnDemand]: 871/883 looper letters, 49 selfloop transitions, 33 changer transitions 0/85 dead transitions. [2023-11-06 22:03:49,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 85 transitions, 460 flow [2023-11-06 22:03:49,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:03:49,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:03:49,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2107 transitions. [2023-11-06 22:03:49,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976972442431106 [2023-11-06 22:03:49,634 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2107 transitions. [2023-11-06 22:03:49,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2107 transitions. [2023-11-06 22:03:49,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:49,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2107 transitions. [2023-11-06 22:03:49,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 351.1666666666667) internal successors, (2107), 6 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:49,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 883.0) internal successors, (6181), 7 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:49,664 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 883.0) internal successors, (6181), 7 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:49,664 INFO L175 Difference]: Start difference. First operand has 55 places, 61 transitions, 182 flow. Second operand 6 states and 2107 transitions. [2023-11-06 22:03:49,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 85 transitions, 460 flow [2023-11-06 22:03:49,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 85 transitions, 428 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:03:49,670 INFO L231 Difference]: Finished difference. Result has 61 places, 85 transitions, 393 flow [2023-11-06 22:03:49,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=61, PETRI_TRANSITIONS=85} [2023-11-06 22:03:49,672 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2023-11-06 22:03:49,672 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 85 transitions, 393 flow [2023-11-06 22:03:49,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:49,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:49,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:03:49,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:49,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:03:49,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:03:49,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:49,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1532305342, now seen corresponding path program 1 times [2023-11-06 22:03:49,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:03:49,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956020071] [2023-11-06 22:03:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:49,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:03:49,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:03:49,887 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:03:49,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-06 22:03:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:49,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:03:49,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:50,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:50,069 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:03:50,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956020071] [2023-11-06 22:03:50,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956020071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:50,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:50,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:03:50,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069337633] [2023-11-06 22:03:50,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:50,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:03:50,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:03:50,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:03:50,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:03:50,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 883 [2023-11-06 22:03:50,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 85 transitions, 393 flow. Second operand has 5 states, 5 states have (on average 350.0) internal successors, (1750), 5 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:50,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:50,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 883 [2023-11-06 22:03:50,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:53,343 INFO L124 PetriNetUnfolderBase]: 9912/12414 cut-off events. [2023-11-06 22:03:53,343 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-06 22:03:53,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24963 conditions, 12414 events. 9912/12414 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 56894 event pairs, 4801 based on Foata normal form. 2/2971 useless extension candidates. Maximal degree in co-relation 24851. Up to 6202 conditions per place. [2023-11-06 22:03:53,425 INFO L140 encePairwiseOnDemand]: 874/883 looper letters, 104 selfloop transitions, 20 changer transitions 0/127 dead transitions. [2023-11-06 22:03:53,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 127 transitions, 745 flow [2023-11-06 22:03:53,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:03:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:03:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1847 transitions. [2023-11-06 22:03:53,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41834654586636466 [2023-11-06 22:03:53,435 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1847 transitions. [2023-11-06 22:03:53,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1847 transitions. [2023-11-06 22:03:53,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:53,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1847 transitions. [2023-11-06 22:03:53,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 369.4) internal successors, (1847), 5 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:53,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 883.0) internal successors, (5298), 6 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:53,457 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 883.0) internal successors, (5298), 6 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:53,457 INFO L175 Difference]: Start difference. First operand has 61 places, 85 transitions, 393 flow. Second operand 5 states and 1847 transitions. [2023-11-06 22:03:53,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 127 transitions, 745 flow [2023-11-06 22:03:53,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 127 transitions, 691 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-11-06 22:03:53,463 INFO L231 Difference]: Finished difference. Result has 65 places, 89 transitions, 420 flow [2023-11-06 22:03:53,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=420, PETRI_PLACES=65, PETRI_TRANSITIONS=89} [2023-11-06 22:03:53,464 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-11-06 22:03:53,464 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 89 transitions, 420 flow [2023-11-06 22:03:53,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 350.0) internal successors, (1750), 5 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:53,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:53,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:03:53,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:53,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:03:53,678 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:03:53,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:53,678 INFO L85 PathProgramCache]: Analyzing trace with hash 49429208, now seen corresponding path program 1 times [2023-11-06 22:03:53,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:03:53,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022710360] [2023-11-06 22:03:53,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:53,679 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:03:53,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:03:53,685 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:03:53,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-06 22:03:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:53,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:03:53,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:53,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:53,912 INFO L322 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2023-11-06 22:03:53,912 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 37 [2023-11-06 22:03:53,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:53,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:53,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:53,985 INFO L322 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2023-11-06 22:03:53,985 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2023-11-06 22:03:54,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:54,017 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 22:03:54,073 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:03:54,073 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:03:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:54,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:54,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:03:54,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022710360] [2023-11-06 22:03:54,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022710360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:54,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:54,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:03:54,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935973798] [2023-11-06 22:03:54,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:54,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:03:54,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:03:54,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:03:54,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:03:54,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 883 [2023-11-06 22:03:54,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 89 transitions, 420 flow. Second operand has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:54,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:54,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 883 [2023-11-06 22:03:54,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:55,965 INFO L124 PetriNetUnfolderBase]: 7786/9836 cut-off events. [2023-11-06 22:03:55,965 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-06 22:03:55,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19801 conditions, 9836 events. 7786/9836 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 45542 event pairs, 3740 based on Foata normal form. 0/2510 useless extension candidates. Maximal degree in co-relation 19704. Up to 9784 conditions per place. [2023-11-06 22:03:56,032 INFO L140 encePairwiseOnDemand]: 880/883 looper letters, 78 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-11-06 22:03:56,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 82 transitions, 540 flow [2023-11-06 22:03:56,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:56,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1139 transitions. [2023-11-06 22:03:56,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42997357493393734 [2023-11-06 22:03:56,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1139 transitions. [2023-11-06 22:03:56,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1139 transitions. [2023-11-06 22:03:56,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:56,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1139 transitions. [2023-11-06 22:03:56,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 379.6666666666667) internal successors, (1139), 3 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:56,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 883.0) internal successors, (3532), 4 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:56,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 883.0) internal successors, (3532), 4 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:56,053 INFO L175 Difference]: Start difference. First operand has 65 places, 89 transitions, 420 flow. Second operand 3 states and 1139 transitions. [2023-11-06 22:03:56,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 82 transitions, 540 flow [2023-11-06 22:03:56,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 82 transitions, 536 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-06 22:03:56,059 INFO L231 Difference]: Finished difference. Result has 65 places, 82 transitions, 380 flow [2023-11-06 22:03:56,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=65, PETRI_TRANSITIONS=82} [2023-11-06 22:03:56,065 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-11-06 22:03:56,065 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 82 transitions, 380 flow [2023-11-06 22:03:56,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:56,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:56,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:03:56,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:56,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:03:56,279 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:03:56,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:56,279 INFO L85 PathProgramCache]: Analyzing trace with hash 49429209, now seen corresponding path program 1 times [2023-11-06 22:03:56,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:03:56,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606855618] [2023-11-06 22:03:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:56,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:03:56,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:03:56,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:03:56,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-06 22:03:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:56,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:03:56,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:56,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:56,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:56,466 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:03:56,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:56,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:56,487 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-06 22:03:56,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:56,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:56,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:56,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:56,575 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:03:56,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:56,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:56,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:56,616 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:03:56,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:56,655 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:03:56,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:56,693 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:03:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:56,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:56,724 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:03:56,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606855618] [2023-11-06 22:03:56,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606855618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:56,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:56,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:03:56,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35895301] [2023-11-06 22:03:56,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:56,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:03:56,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:03:56,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:03:56,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:03:57,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 883 [2023-11-06 22:03:57,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 82 transitions, 380 flow. Second operand has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:57,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:57,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 883 [2023-11-06 22:03:57,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:58,594 INFO L124 PetriNetUnfolderBase]: 5582/7180 cut-off events. [2023-11-06 22:03:58,594 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-06 22:03:58,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14474 conditions, 7180 events. 5582/7180 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 33310 event pairs, 2660 based on Foata normal form. 0/2050 useless extension candidates. Maximal degree in co-relation 14459. Up to 7128 conditions per place. [2023-11-06 22:03:58,639 INFO L140 encePairwiseOnDemand]: 880/883 looper letters, 71 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-11-06 22:03:58,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 75 transitions, 486 flow [2023-11-06 22:03:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:58,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1137 transitions. [2023-11-06 22:03:58,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292185730464326 [2023-11-06 22:03:58,647 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1137 transitions. [2023-11-06 22:03:58,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1137 transitions. [2023-11-06 22:03:58,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:58,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1137 transitions. [2023-11-06 22:03:58,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 379.0) internal successors, (1137), 3 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:58,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 883.0) internal successors, (3532), 4 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:58,659 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 883.0) internal successors, (3532), 4 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:58,660 INFO L175 Difference]: Start difference. First operand has 65 places, 82 transitions, 380 flow. Second operand 3 states and 1137 transitions. [2023-11-06 22:03:58,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 75 transitions, 486 flow [2023-11-06 22:03:58,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 75 transitions, 485 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:03:58,663 INFO L231 Difference]: Finished difference. Result has 64 places, 75 transitions, 343 flow [2023-11-06 22:03:58,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=64, PETRI_TRANSITIONS=75} [2023-11-06 22:03:58,665 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-11-06 22:03:58,665 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 75 transitions, 343 flow [2023-11-06 22:03:58,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:58,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:58,666 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:03:58,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:58,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:03:58,882 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:03:58,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:58,883 INFO L85 PathProgramCache]: Analyzing trace with hash 189091234, now seen corresponding path program 2 times [2023-11-06 22:03:58,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:03:58,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144205834] [2023-11-06 22:03:58,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:03:58,883 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:03:58,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:03:58,884 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:03:58,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-06 22:03:58,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:03:58,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:03:58,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:03:58,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:59,014 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:03:59,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,029 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:59,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,044 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:59,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,051 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:59,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,065 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:59,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,087 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,102 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:59,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,114 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:59,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,126 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:59,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,133 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:59,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,155 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:59,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,174 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:59,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,189 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:59,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,197 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:59,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:59,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,229 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:59,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:59,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:59,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,275 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:59,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,321 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:03:59,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,347 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:59,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:59,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,381 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:03:59,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:59,393 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:03:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:59,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:00,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:04:00,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144205834] [2023-11-06 22:04:00,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144205834] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:00,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:04:00,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:04:00,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919227884] [2023-11-06 22:04:00,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:00,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:04:00,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:04:00,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:04:00,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:04:08,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 883 [2023-11-06 22:04:08,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 75 transitions, 343 flow. Second operand has 12 states, 12 states have (on average 340.0) internal successors, (4080), 12 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:08,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:08,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 883 [2023-11-06 22:04:08,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:12,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:04:14,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:04:16,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:04:18,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:04:20,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:04:22,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:04:24,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:04:26,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:04:28,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:04:30,192 INFO L124 PetriNetUnfolderBase]: 5594/7204 cut-off events. [2023-11-06 22:04:30,193 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-11-06 22:04:30,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14571 conditions, 7204 events. 5594/7204 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 33204 event pairs, 2660 based on Foata normal form. 12/2083 useless extension candidates. Maximal degree in co-relation 14555. Up to 7111 conditions per place. [2023-11-06 22:04:30,245 INFO L140 encePairwiseOnDemand]: 873/883 looper letters, 46 selfloop transitions, 50 changer transitions 0/99 dead transitions. [2023-11-06 22:04:30,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 697 flow [2023-11-06 22:04:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:04:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:04:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4174 transitions. [2023-11-06 22:04:30,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.393922234805587 [2023-11-06 22:04:30,264 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4174 transitions. [2023-11-06 22:04:30,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4174 transitions. [2023-11-06 22:04:30,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:30,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4174 transitions. [2023-11-06 22:04:30,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 347.8333333333333) internal successors, (4174), 12 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:30,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 883.0) internal successors, (11479), 13 states have internal predecessors, (11479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:30,318 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 883.0) internal successors, (11479), 13 states have internal predecessors, (11479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:30,318 INFO L175 Difference]: Start difference. First operand has 64 places, 75 transitions, 343 flow. Second operand 12 states and 4174 transitions. [2023-11-06 22:04:30,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 697 flow [2023-11-06 22:04:30,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 99 transitions, 696 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:04:30,324 INFO L231 Difference]: Finished difference. Result has 80 places, 99 transitions, 672 flow [2023-11-06 22:04:30,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=672, PETRI_PLACES=80, PETRI_TRANSITIONS=99} [2023-11-06 22:04:30,325 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 17 predicate places. [2023-11-06 22:04:30,326 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 99 transitions, 672 flow [2023-11-06 22:04:30,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 340.0) internal successors, (4080), 12 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:30,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:30,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:04:30,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:30,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:04:30,546 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:04:30,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:30,546 INFO L85 PathProgramCache]: Analyzing trace with hash 256863050, now seen corresponding path program 1 times [2023-11-06 22:04:30,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:04:30,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679379187] [2023-11-06 22:04:30,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:30,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:04:30,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:04:30,548 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:04:30,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-06 22:04:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:30,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:04:30,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:30,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,745 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 22:04:30,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-06 22:04:30,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,795 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-06 22:04:30,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:04:30,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,864 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:04:30,864 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-06 22:04:30,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,902 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:04:30,902 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 22:04:30,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,932 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:04:30,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-06 22:04:30,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:30,993 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:04:30,994 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 22:04:31,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:31,024 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 22:04:31,069 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:04:31,069 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:04:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:31,113 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:31,113 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:04:31,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679379187] [2023-11-06 22:04:31,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679379187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:31,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:31,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:04:31,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961022852] [2023-11-06 22:04:31,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:31,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:04:31,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:04:31,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:04:31,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:04:31,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 883 [2023-11-06 22:04:31,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 99 transitions, 672 flow. Second operand has 4 states, 4 states have (on average 364.5) internal successors, (1458), 4 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:31,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:31,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 883 [2023-11-06 22:04:31,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:32,645 INFO L124 PetriNetUnfolderBase]: 5276/6786 cut-off events. [2023-11-06 22:04:32,645 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2023-11-06 22:04:32,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13831 conditions, 6786 events. 5276/6786 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 30774 event pairs, 2502 based on Foata normal form. 0/2014 useless extension candidates. Maximal degree in co-relation 13808. Up to 6734 conditions per place. [2023-11-06 22:04:32,689 INFO L140 encePairwiseOnDemand]: 880/883 looper letters, 93 selfloop transitions, 1 changer transitions 0/97 dead transitions. [2023-11-06 22:04:32,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 97 transitions, 856 flow [2023-11-06 22:04:32,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:04:32,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:04:32,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1135 transitions. [2023-11-06 22:04:32,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4284635711589279 [2023-11-06 22:04:32,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1135 transitions. [2023-11-06 22:04:32,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1135 transitions. [2023-11-06 22:04:32,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:32,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1135 transitions. [2023-11-06 22:04:32,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 378.3333333333333) internal successors, (1135), 3 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:32,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 883.0) internal successors, (3532), 4 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:32,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 883.0) internal successors, (3532), 4 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:32,706 INFO L175 Difference]: Start difference. First operand has 80 places, 99 transitions, 672 flow. Second operand 3 states and 1135 transitions. [2023-11-06 22:04:32,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 97 transitions, 856 flow [2023-11-06 22:04:32,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 97 transitions, 714 flow, removed 36 selfloop flow, removed 5 redundant places. [2023-11-06 22:04:32,713 INFO L231 Difference]: Finished difference. Result has 75 places, 97 transitions, 528 flow [2023-11-06 22:04:32,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=528, PETRI_PLACES=75, PETRI_TRANSITIONS=97} [2023-11-06 22:04:32,714 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 12 predicate places. [2023-11-06 22:04:32,714 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 97 transitions, 528 flow [2023-11-06 22:04:32,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 364.5) internal successors, (1458), 4 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:32,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:32,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:04:32,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-06 22:04:32,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:04:32,927 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:04:32,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:32,928 INFO L85 PathProgramCache]: Analyzing trace with hash 256863049, now seen corresponding path program 1 times [2023-11-06 22:04:32,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:04:32,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148145691] [2023-11-06 22:04:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:32,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:04:32,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:04:32,929 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:04:32,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-06 22:04:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:33,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:04:33,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:33,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:04:33,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,127 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:04:33,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,146 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:04:33,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,179 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:04:33,200 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:04:33,205 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:04:33,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,264 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:04:33,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,304 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:04:33,316 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:04:33,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,364 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:04:33,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:33,391 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:04:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:33,462 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:33,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:04:33,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148145691] [2023-11-06 22:04:33,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148145691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:33,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:33,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:04:33,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844787423] [2023-11-06 22:04:33,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:33,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:04:33,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:04:33,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:04:33,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:04:34,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 883 [2023-11-06 22:04:34,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 97 transitions, 528 flow. Second operand has 4 states, 4 states have (on average 364.5) internal successors, (1458), 4 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:34,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:34,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 883 [2023-11-06 22:04:34,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:35,183 INFO L124 PetriNetUnfolderBase]: 4958/6368 cut-off events. [2023-11-06 22:04:35,183 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-06 22:04:35,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12925 conditions, 6368 events. 4958/6368 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 28727 event pairs, 2344 based on Foata normal form. 0/1954 useless extension candidates. Maximal degree in co-relation 12902. Up to 6316 conditions per place. [2023-11-06 22:04:35,220 INFO L140 encePairwiseOnDemand]: 880/883 looper letters, 91 selfloop transitions, 1 changer transitions 0/95 dead transitions. [2023-11-06 22:04:35,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 95 transitions, 708 flow [2023-11-06 22:04:35,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:04:35,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:04:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1133 transitions. [2023-11-06 22:04:35,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4277085692714232 [2023-11-06 22:04:35,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1133 transitions. [2023-11-06 22:04:35,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1133 transitions. [2023-11-06 22:04:35,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:35,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1133 transitions. [2023-11-06 22:04:35,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 377.6666666666667) internal successors, (1133), 3 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:35,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 883.0) internal successors, (3532), 4 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:35,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 883.0) internal successors, (3532), 4 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:35,236 INFO L175 Difference]: Start difference. First operand has 75 places, 97 transitions, 528 flow. Second operand 3 states and 1133 transitions. [2023-11-06 22:04:35,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 95 transitions, 708 flow [2023-11-06 22:04:35,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 95 transitions, 707 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:04:35,242 INFO L231 Difference]: Finished difference. Result has 74 places, 95 transitions, 525 flow [2023-11-06 22:04:35,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=525, PETRI_PLACES=74, PETRI_TRANSITIONS=95} [2023-11-06 22:04:35,243 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 11 predicate places. [2023-11-06 22:04:35,243 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 95 transitions, 525 flow [2023-11-06 22:04:35,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 364.5) internal successors, (1458), 4 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:35,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:35,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:35,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:35,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:04:35,462 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:04:35,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:35,462 INFO L85 PathProgramCache]: Analyzing trace with hash -627195466, now seen corresponding path program 1 times [2023-11-06 22:04:35,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:04:35,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322452500] [2023-11-06 22:04:35,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:35,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:04:35,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:04:35,464 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:04:35,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-06 22:04:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:35,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:04:35,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:35,627 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:35,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:04:35,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322452500] [2023-11-06 22:04:35,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322452500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:35,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:35,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:04:35,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2814220] [2023-11-06 22:04:35,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:35,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:04:35,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:04:35,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:04:35,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:04:36,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 883 [2023-11-06 22:04:36,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 95 transitions, 525 flow. Second operand has 5 states, 5 states have (on average 349.4) internal successors, (1747), 5 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:36,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:36,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 883 [2023-11-06 22:04:36,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:37,648 INFO L124 PetriNetUnfolderBase]: 3487/4673 cut-off events. [2023-11-06 22:04:37,648 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-06 22:04:37,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9536 conditions, 4673 events. 3487/4673 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 22419 event pairs, 1680 based on Foata normal form. 0/1749 useless extension candidates. Maximal degree in co-relation 9512. Up to 2780 conditions per place. [2023-11-06 22:04:37,684 INFO L140 encePairwiseOnDemand]: 871/883 looper letters, 115 selfloop transitions, 27 changer transitions 0/144 dead transitions. [2023-11-06 22:04:37,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 144 transitions, 915 flow [2023-11-06 22:04:37,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:04:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:04:37,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2191 transitions. [2023-11-06 22:04:37,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4135522838807097 [2023-11-06 22:04:37,693 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2191 transitions. [2023-11-06 22:04:37,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2191 transitions. [2023-11-06 22:04:37,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:37,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2191 transitions. [2023-11-06 22:04:37,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 365.1666666666667) internal successors, (2191), 6 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:37,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 883.0) internal successors, (6181), 7 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:37,711 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 883.0) internal successors, (6181), 7 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:37,712 INFO L175 Difference]: Start difference. First operand has 74 places, 95 transitions, 525 flow. Second operand 6 states and 2191 transitions. [2023-11-06 22:04:37,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 144 transitions, 915 flow [2023-11-06 22:04:37,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 144 transitions, 914 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:04:37,718 INFO L231 Difference]: Finished difference. Result has 80 places, 97 transitions, 598 flow [2023-11-06 22:04:37,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=598, PETRI_PLACES=80, PETRI_TRANSITIONS=97} [2023-11-06 22:04:37,720 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 17 predicate places. [2023-11-06 22:04:37,720 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 97 transitions, 598 flow [2023-11-06 22:04:37,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 349.4) internal successors, (1747), 5 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:37,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:37,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:37,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:37,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:04:37,933 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:04:37,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:37,933 INFO L85 PathProgramCache]: Analyzing trace with hash 2032288569, now seen corresponding path program 1 times [2023-11-06 22:04:37,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:04:37,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204365749] [2023-11-06 22:04:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:37,934 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:04:37,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:04:37,935 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:04:37,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-06 22:04:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:38,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:04:38,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:38,090 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 22:04:38,090 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-06 22:04:38,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,123 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:04:38,123 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-06 22:04:38,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,137 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:04:38,137 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 22:04:38,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,168 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:04:38,168 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 22:04:38,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,181 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:04:38,182 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:04:38,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,195 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:04:38,195 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 22:04:38,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,231 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:04:38,232 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-06 22:04:38,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,285 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:04:38,285 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-06 22:04:38,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,320 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:04:38,321 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 22:04:38,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,353 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:04:38,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 22:04:38,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,364 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:04:38,365 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:04:38,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,376 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:04:38,377 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 22:04:38,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:38,405 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 22:04:38,452 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:04:38,453 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:04:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:38,526 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:38,526 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:04:38,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204365749] [2023-11-06 22:04:38,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204365749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:38,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:38,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:04:38,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624007384] [2023-11-06 22:04:38,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:38,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:04:38,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:04:38,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:04:38,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:04:39,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 883 [2023-11-06 22:04:39,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 97 transitions, 598 flow. Second operand has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:39,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:39,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 883 [2023-11-06 22:04:39,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:40,003 INFO L124 PetriNetUnfolderBase]: 3401/4423 cut-off events. [2023-11-06 22:04:40,004 INFO L125 PetriNetUnfolderBase]: For 632/732 co-relation queries the response was YES. [2023-11-06 22:04:40,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10104 conditions, 4423 events. 3401/4423 cut-off events. For 632/732 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 20084 event pairs, 1636 based on Foata normal form. 100/1598 useless extension candidates. Maximal degree in co-relation 10077. Up to 4391 conditions per place. [2023-11-06 22:04:40,030 INFO L140 encePairwiseOnDemand]: 880/883 looper letters, 90 selfloop transitions, 1 changer transitions 0/95 dead transitions. [2023-11-06 22:04:40,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 95 transitions, 776 flow [2023-11-06 22:04:40,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:04:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:04:40,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1119 transitions. [2023-11-06 22:04:40,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42242355605889015 [2023-11-06 22:04:40,035 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1119 transitions. [2023-11-06 22:04:40,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1119 transitions. [2023-11-06 22:04:40,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:40,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1119 transitions. [2023-11-06 22:04:40,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 373.0) internal successors, (1119), 3 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:40,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 883.0) internal successors, (3532), 4 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:40,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 883.0) internal successors, (3532), 4 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:40,043 INFO L175 Difference]: Start difference. First operand has 80 places, 97 transitions, 598 flow. Second operand 3 states and 1119 transitions. [2023-11-06 22:04:40,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 95 transitions, 776 flow [2023-11-06 22:04:40,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 95 transitions, 728 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:04:40,049 INFO L231 Difference]: Finished difference. Result has 77 places, 95 transitions, 548 flow [2023-11-06 22:04:40,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=548, PETRI_PLACES=77, PETRI_TRANSITIONS=95} [2023-11-06 22:04:40,050 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 14 predicate places. [2023-11-06 22:04:40,050 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 95 transitions, 548 flow [2023-11-06 22:04:40,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:40,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:40,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:40,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:40,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:04:40,264 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:04:40,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:40,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2032288570, now seen corresponding path program 1 times [2023-11-06 22:04:40,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:04:40,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568538844] [2023-11-06 22:04:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:40,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:04:40,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:04:40,266 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:04:40,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-06 22:04:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:40,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:04:40,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:40,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:40,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:40,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:40,471 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 22:04:40,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:40,490 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-06 22:04:40,525 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:04:40,531 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:04:40,550 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:04:40,557 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:04:40,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:40,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:40,579 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:04:40,594 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:04:40,600 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:04:40,621 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:04:40,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:40,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:40,637 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:04:40,646 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:04:40,673 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:04:40,678 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:04:40,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:40,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:40,694 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:04:40,711 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:04:40,729 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:04:40,733 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:04:40,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:40,770 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:04:40,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:40,795 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:04:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:40,893 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:40,893 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:04:40,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568538844] [2023-11-06 22:04:40,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568538844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:40,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:40,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:04:40,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540353045] [2023-11-06 22:04:40,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:40,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:04:40,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:04:40,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:04:40,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:04:41,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 883 [2023-11-06 22:04:41,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 95 transitions, 548 flow. Second operand has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:41,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:41,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 883 [2023-11-06 22:04:41,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:42,124 INFO L124 PetriNetUnfolderBase]: 3274/4243 cut-off events. [2023-11-06 22:04:42,124 INFO L125 PetriNetUnfolderBase]: For 563/658 co-relation queries the response was YES. [2023-11-06 22:04:42,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9672 conditions, 4243 events. 3274/4243 cut-off events. For 563/658 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 18930 event pairs, 1573 based on Foata normal form. 95/1566 useless extension candidates. Maximal degree in co-relation 9645. Up to 4211 conditions per place. [2023-11-06 22:04:42,151 INFO L140 encePairwiseOnDemand]: 880/883 looper letters, 88 selfloop transitions, 1 changer transitions 0/93 dead transitions. [2023-11-06 22:04:42,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 722 flow [2023-11-06 22:04:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:04:42,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:04:42,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1129 transitions. [2023-11-06 22:04:42,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261985654964137 [2023-11-06 22:04:42,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1129 transitions. [2023-11-06 22:04:42,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1129 transitions. [2023-11-06 22:04:42,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:42,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1129 transitions. [2023-11-06 22:04:42,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 376.3333333333333) internal successors, (1129), 3 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:42,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 883.0) internal successors, (3532), 4 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:42,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 883.0) internal successors, (3532), 4 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:42,162 INFO L175 Difference]: Start difference. First operand has 77 places, 95 transitions, 548 flow. Second operand 3 states and 1129 transitions. [2023-11-06 22:04:42,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 722 flow [2023-11-06 22:04:42,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 93 transitions, 721 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:04:42,169 INFO L231 Difference]: Finished difference. Result has 76 places, 93 transitions, 545 flow [2023-11-06 22:04:42,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=545, PETRI_PLACES=76, PETRI_TRANSITIONS=93} [2023-11-06 22:04:42,170 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 13 predicate places. [2023-11-06 22:04:42,170 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 93 transitions, 545 flow [2023-11-06 22:04:42,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:42,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:42,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:42,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:42,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:04:42,384 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:04:42,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:42,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1423577766, now seen corresponding path program 1 times [2023-11-06 22:04:42,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:04:42,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269328263] [2023-11-06 22:04:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:42,385 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:04:42,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:04:42,386 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:04:42,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-06 22:04:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:42,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:04:42,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:42,579 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:42,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:04:42,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269328263] [2023-11-06 22:04:42,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269328263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:42,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:42,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:04:42,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854243592] [2023-11-06 22:04:42,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:42,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:04:42,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:04:42,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:04:42,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:04:42,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 883 [2023-11-06 22:04:42,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 93 transitions, 545 flow. Second operand has 5 states, 5 states have (on average 349.8) internal successors, (1749), 5 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:42,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:42,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 883 [2023-11-06 22:04:42,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:44,262 INFO L124 PetriNetUnfolderBase]: 2484/3337 cut-off events. [2023-11-06 22:04:44,262 INFO L125 PetriNetUnfolderBase]: For 507/565 co-relation queries the response was YES. [2023-11-06 22:04:44,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7803 conditions, 3337 events. 2484/3337 cut-off events. For 507/565 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 15180 event pairs, 1220 based on Foata normal form. 58/1405 useless extension candidates. Maximal degree in co-relation 7775. Up to 2696 conditions per place. [2023-11-06 22:04:44,282 INFO L140 encePairwiseOnDemand]: 871/883 looper letters, 99 selfloop transitions, 27 changer transitions 0/129 dead transitions. [2023-11-06 22:04:44,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 129 transitions, 881 flow [2023-11-06 22:04:44,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:04:44,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:04:44,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2175 transitions. [2023-11-06 22:04:44,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41053227633069084 [2023-11-06 22:04:44,289 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2175 transitions. [2023-11-06 22:04:44,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2175 transitions. [2023-11-06 22:04:44,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:44,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2175 transitions. [2023-11-06 22:04:44,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 362.5) internal successors, (2175), 6 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:44,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 883.0) internal successors, (6181), 7 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:44,303 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 883.0) internal successors, (6181), 7 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:44,303 INFO L175 Difference]: Start difference. First operand has 76 places, 93 transitions, 545 flow. Second operand 6 states and 2175 transitions. [2023-11-06 22:04:44,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 129 transitions, 881 flow [2023-11-06 22:04:44,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 129 transitions, 880 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:04:44,310 INFO L231 Difference]: Finished difference. Result has 82 places, 95 transitions, 618 flow [2023-11-06 22:04:44,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=618, PETRI_PLACES=82, PETRI_TRANSITIONS=95} [2023-11-06 22:04:44,311 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 19 predicate places. [2023-11-06 22:04:44,311 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 95 transitions, 618 flow [2023-11-06 22:04:44,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 349.8) internal successors, (1749), 5 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:44,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:44,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:44,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:44,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:04:44,525 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:04:44,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:44,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1916406452, now seen corresponding path program 1 times [2023-11-06 22:04:44,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:04:44,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831715960] [2023-11-06 22:04:44,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:44,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:04:44,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:04:44,527 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:04:44,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-06 22:04:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:44,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:04:44,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:44,751 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 22:04:44,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:04:44,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:44,789 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:04:44,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:44,843 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:04:44,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:44,874 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:04:44,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:44,891 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:04:44,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:44,921 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:04:44,934 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:04:44,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:44,949 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:04:44,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:44,971 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:04:44,983 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:04:44,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:44,997 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:04:45,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,013 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:04:45,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,031 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:04:45,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,059 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:04:45,071 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:04:45,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,085 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:04:45,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,099 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:04:45,111 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:04:45,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:04:45,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,140 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:04:45,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,158 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:04:45,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,185 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:04:45,199 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:04:45,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:04:45,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,229 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:04:45,242 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:04:45,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,257 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:04:45,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,273 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:04:45,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,292 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:04:45,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,323 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:04:45,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,484 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:04:45,501 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:04:45,502 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-06 22:04:45,596 INFO L322 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-06 22:04:45,596 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-11-06 22:04:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:04:45,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:04:46,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:04:46,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831715960] [2023-11-06 22:04:46,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831715960] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:46,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:04:46,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:04:46,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402507301] [2023-11-06 22:04:46,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:46,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:04:46,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:04:46,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:04:46,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:04:51,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:05:00,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 883 [2023-11-06 22:05:00,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 95 transitions, 618 flow. Second operand has 12 states, 12 states have (on average 322.6666666666667) internal successors, (3872), 12 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:00,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:00,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 883 [2023-11-06 22:05:00,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:03,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:05:06,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:05:08,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:05:10,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:05:12,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:05:14,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:05:16,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:05:18,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:05:20,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:05:22,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:05:24,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:05:26,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:05:35,238 INFO L124 PetriNetUnfolderBase]: 8458/11154 cut-off events. [2023-11-06 22:05:35,238 INFO L125 PetriNetUnfolderBase]: For 2382/2525 co-relation queries the response was YES. [2023-11-06 22:05:35,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28705 conditions, 11154 events. 8458/11154 cut-off events. For 2382/2525 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 60118 event pairs, 3247 based on Foata normal form. 149/4323 useless extension candidates. Maximal degree in co-relation 28674. Up to 3535 conditions per place. [2023-11-06 22:05:35,334 INFO L140 encePairwiseOnDemand]: 869/883 looper letters, 183 selfloop transitions, 67 changer transitions 0/253 dead transitions. [2023-11-06 22:05:35,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 253 transitions, 1764 flow [2023-11-06 22:05:35,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:05:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:05:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5671 transitions. [2023-11-06 22:05:35,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3777896209446406 [2023-11-06 22:05:35,350 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5671 transitions. [2023-11-06 22:05:35,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5671 transitions. [2023-11-06 22:05:35,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:35,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5671 transitions. [2023-11-06 22:05:35,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 333.5882352941176) internal successors, (5671), 17 states have internal predecessors, (5671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:35,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 883.0) internal successors, (15894), 18 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:35,376 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 883.0) internal successors, (15894), 18 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:35,376 INFO L175 Difference]: Start difference. First operand has 82 places, 95 transitions, 618 flow. Second operand 17 states and 5671 transitions. [2023-11-06 22:05:35,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 253 transitions, 1764 flow [2023-11-06 22:05:35,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 253 transitions, 1689 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:05:35,390 INFO L231 Difference]: Finished difference. Result has 99 places, 125 transitions, 972 flow [2023-11-06 22:05:35,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=972, PETRI_PLACES=99, PETRI_TRANSITIONS=125} [2023-11-06 22:05:35,391 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 36 predicate places. [2023-11-06 22:05:35,391 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 125 transitions, 972 flow [2023-11-06 22:05:35,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 322.6666666666667) internal successors, (3872), 12 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:35,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:35,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:35,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:35,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:05:35,593 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:05:35,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:35,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1916406453, now seen corresponding path program 1 times [2023-11-06 22:05:35,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:05:35,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975520258] [2023-11-06 22:05:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:35,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:05:35,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:05:35,595 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:05:35,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-06 22:05:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:35,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:05:35,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:35,802 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:05:35,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:35,812 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:05:35,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:35,820 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:05:35,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:35,825 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:05:35,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:35,843 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:05:35,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:35,852 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:05:35,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:35,860 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:05:35,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:35,869 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:05:35,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:35,875 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:05:35,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:35,885 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:05:35,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:35,904 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:05:35,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:35,919 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:05:35,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:35,932 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:05:35,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:35,950 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:05:35,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:35,980 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:05:35,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:35,996 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:05:36,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:36,014 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:05:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:36,021 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:05:36,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:36,028 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:05:36,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:36,035 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:05:36,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:36,046 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:05:36,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:36,064 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:05:36,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:36,073 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:05:36,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:36,079 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:05:36,119 INFO L322 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-06 22:05:36,119 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-06 22:05:36,151 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:05:36,151 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:05:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:05:36,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:05:36,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:05:36,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975520258] [2023-11-06 22:05:36,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975520258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:36,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:36,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:05:36,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283552363] [2023-11-06 22:05:36,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:36,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:05:36,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:05:36,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:05:36,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:05:36,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 883 [2023-11-06 22:05:36,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 125 transitions, 972 flow. Second operand has 4 states, 4 states have (on average 350.25) internal successors, (1401), 4 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:36,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:36,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 883 [2023-11-06 22:05:36,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:37,855 INFO L124 PetriNetUnfolderBase]: 5332/7050 cut-off events. [2023-11-06 22:05:37,856 INFO L125 PetriNetUnfolderBase]: For 4218/4616 co-relation queries the response was YES. [2023-11-06 22:05:37,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20870 conditions, 7050 events. 5332/7050 cut-off events. For 4218/4616 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 35223 event pairs, 2679 based on Foata normal form. 921/3655 useless extension candidates. Maximal degree in co-relation 20835. Up to 6913 conditions per place. [2023-11-06 22:05:37,911 INFO L140 encePairwiseOnDemand]: 878/883 looper letters, 90 selfloop transitions, 26 changer transitions 0/123 dead transitions. [2023-11-06 22:05:37,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 123 transitions, 1198 flow [2023-11-06 22:05:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:05:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:05:37,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1778 transitions. [2023-11-06 22:05:37,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.402718006795017 [2023-11-06 22:05:37,918 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1778 transitions. [2023-11-06 22:05:37,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1778 transitions. [2023-11-06 22:05:37,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:37,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1778 transitions. [2023-11-06 22:05:37,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 355.6) internal successors, (1778), 5 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:37,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 883.0) internal successors, (5298), 6 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:37,931 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 883.0) internal successors, (5298), 6 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:37,931 INFO L175 Difference]: Start difference. First operand has 99 places, 125 transitions, 972 flow. Second operand 5 states and 1778 transitions. [2023-11-06 22:05:37,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 123 transitions, 1198 flow [2023-11-06 22:05:37,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 123 transitions, 1107 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-11-06 22:05:37,947 INFO L231 Difference]: Finished difference. Result has 98 places, 123 transitions, 927 flow [2023-11-06 22:05:37,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=927, PETRI_PLACES=98, PETRI_TRANSITIONS=123} [2023-11-06 22:05:37,948 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 35 predicate places. [2023-11-06 22:05:37,948 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 123 transitions, 927 flow [2023-11-06 22:05:37,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 350.25) internal successors, (1401), 4 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:37,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:37,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:37,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:38,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:05:38,159 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:05:38,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:38,160 INFO L85 PathProgramCache]: Analyzing trace with hash 2050810906, now seen corresponding path program 1 times [2023-11-06 22:05:38,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:05:38,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779178635] [2023-11-06 22:05:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:38,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:05:38,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:05:38,161 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:05:38,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-06 22:05:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:38,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:05:38,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:38,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:05:38,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:05:38,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779178635] [2023-11-06 22:05:38,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779178635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:38,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:38,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:05:38,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901878302] [2023-11-06 22:05:38,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:38,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:05:38,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:05:38,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:05:38,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:05:38,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 883 [2023-11-06 22:05:38,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 123 transitions, 927 flow. Second operand has 5 states, 5 states have (on average 350.2) internal successors, (1751), 5 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:38,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:38,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 883 [2023-11-06 22:05:38,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:40,568 INFO L124 PetriNetUnfolderBase]: 4368/5946 cut-off events. [2023-11-06 22:05:40,569 INFO L125 PetriNetUnfolderBase]: For 3588/3834 co-relation queries the response was YES. [2023-11-06 22:05:40,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18225 conditions, 5946 events. 4368/5946 cut-off events. For 3588/3834 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 30660 event pairs, 2555 based on Foata normal form. 246/2950 useless extension candidates. Maximal degree in co-relation 18190. Up to 5672 conditions per place. [2023-11-06 22:05:40,615 INFO L140 encePairwiseOnDemand]: 868/883 looper letters, 97 selfloop transitions, 41 changer transitions 0/144 dead transitions. [2023-11-06 22:05:40,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 144 transitions, 1261 flow [2023-11-06 22:05:40,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:05:40,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:05:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2162 transitions. [2023-11-06 22:05:40,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080785201963005 [2023-11-06 22:05:40,622 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2162 transitions. [2023-11-06 22:05:40,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2162 transitions. [2023-11-06 22:05:40,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:40,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2162 transitions. [2023-11-06 22:05:40,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 360.3333333333333) internal successors, (2162), 6 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:40,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 883.0) internal successors, (6181), 7 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:40,635 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 883.0) internal successors, (6181), 7 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:40,636 INFO L175 Difference]: Start difference. First operand has 98 places, 123 transitions, 927 flow. Second operand 6 states and 2162 transitions. [2023-11-06 22:05:40,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 144 transitions, 1261 flow [2023-11-06 22:05:40,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 144 transitions, 1223 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:05:40,653 INFO L231 Difference]: Finished difference. Result has 102 places, 125 transitions, 998 flow [2023-11-06 22:05:40,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=998, PETRI_PLACES=102, PETRI_TRANSITIONS=125} [2023-11-06 22:05:40,654 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 39 predicate places. [2023-11-06 22:05:40,654 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 125 transitions, 998 flow [2023-11-06 22:05:40,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 350.2) internal successors, (1751), 5 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:40,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:40,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:40,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:40,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:05:40,868 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:05:40,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:40,868 INFO L85 PathProgramCache]: Analyzing trace with hash 720957181, now seen corresponding path program 1 times [2023-11-06 22:05:40,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:05:40,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772372186] [2023-11-06 22:05:40,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:40,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:05:40,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:05:40,870 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:05:40,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-06 22:05:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:41,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:05:41,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:05:41,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:05:41,426 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:05:41,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772372186] [2023-11-06 22:05:41,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772372186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:41,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:05:41,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:05:41,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109729972] [2023-11-06 22:05:41,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:41,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:05:41,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:05:41,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:05:41,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:05:43,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 883 [2023-11-06 22:05:43,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 125 transitions, 998 flow. Second operand has 12 states, 12 states have (on average 342.8333333333333) internal successors, (4114), 12 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:43,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:43,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 883 [2023-11-06 22:05:43,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:47,170 INFO L124 PetriNetUnfolderBase]: 8163/10867 cut-off events. [2023-11-06 22:05:47,170 INFO L125 PetriNetUnfolderBase]: For 5131/5191 co-relation queries the response was YES. [2023-11-06 22:05:47,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33688 conditions, 10867 events. 8163/10867 cut-off events. For 5131/5191 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 57350 event pairs, 3047 based on Foata normal form. 153/4835 useless extension candidates. Maximal degree in co-relation 33651. Up to 4284 conditions per place. [2023-11-06 22:05:47,262 INFO L140 encePairwiseOnDemand]: 869/883 looper letters, 140 selfloop transitions, 65 changer transitions 0/209 dead transitions. [2023-11-06 22:05:47,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 209 transitions, 1719 flow [2023-11-06 22:05:47,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:05:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:05:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 4575 transitions. [2023-11-06 22:05:47,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3985538810000871 [2023-11-06 22:05:47,275 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 4575 transitions. [2023-11-06 22:05:47,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 4575 transitions. [2023-11-06 22:05:47,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:47,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 4575 transitions. [2023-11-06 22:05:47,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 351.9230769230769) internal successors, (4575), 13 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:47,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 883.0) internal successors, (12362), 14 states have internal predecessors, (12362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:47,295 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 883.0) internal successors, (12362), 14 states have internal predecessors, (12362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:47,296 INFO L175 Difference]: Start difference. First operand has 102 places, 125 transitions, 998 flow. Second operand 13 states and 4575 transitions. [2023-11-06 22:05:47,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 209 transitions, 1719 flow [2023-11-06 22:05:47,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 209 transitions, 1640 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:05:47,385 INFO L231 Difference]: Finished difference. Result has 114 places, 134 transitions, 1149 flow [2023-11-06 22:05:47,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=883, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1149, PETRI_PLACES=114, PETRI_TRANSITIONS=134} [2023-11-06 22:05:47,386 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 51 predicate places. [2023-11-06 22:05:47,386 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 134 transitions, 1149 flow [2023-11-06 22:05:47,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 342.8333333333333) internal successors, (4114), 12 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:47,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:47,387 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 2, 1, 1, 1] [2023-11-06 22:05:47,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:47,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:05:47,597 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:05:47,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:47,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1900765276, now seen corresponding path program 1 times [2023-11-06 22:05:47,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:05:47,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379794779] [2023-11-06 22:05:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:47,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:05:47,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:05:47,599 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:05:47,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fa0c1e1-ec69-4d43-847b-8a8dd0f7f914/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-06 22:05:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:47,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:05:47,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:47,813 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:05:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:05:48,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:49,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:05:49,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379794779] [2023-11-06 22:05:49,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379794779] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:49,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:05:49,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 19 [2023-11-06 22:05:49,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922115198] [2023-11-06 22:05:49,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:49,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:05:49,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:05:49,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:05:49,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380