./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.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_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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_38403697-bf74-456d-82c8-be51814538cd/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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:26:18,392 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:26:18,467 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:26:18,473 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:26:18,473 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:26:18,499 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:26:18,500 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:26:18,501 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:26:18,501 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:26:18,502 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:26:18,503 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:26:18,504 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:26:18,504 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:26:18,505 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:26:18,505 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:26:18,506 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:26:18,506 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:26:18,507 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:26:18,507 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:26:18,508 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:26:18,508 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:26:18,509 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:26:18,510 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:26:18,510 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:26:18,511 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:26:18,511 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:26:18,512 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:26:18,512 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:26:18,513 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:26:18,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:26:18,514 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:26:18,514 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:26:18,514 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:26:18,515 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:26:18,515 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:26:18,516 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:26:18,516 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:26:18,517 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:26:18,517 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_38403697-bf74-456d-82c8-be51814538cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2023-11-06 22:26:18,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:26:18,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:26:18,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:26:18,802 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:26:18,802 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:26:18,803 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-06 22:26:21,898 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:26:22,103 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:26:22,104 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-06 22:26:22,113 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/data/fd7e87345/d8087ef892c048b1b252ed64b71ea1d2/FLAGb1e4754d7 [2023-11-06 22:26:22,128 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/data/fd7e87345/d8087ef892c048b1b252ed64b71ea1d2 [2023-11-06 22:26:22,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:26:22,132 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:26:22,134 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:26:22,134 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:26:22,139 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:26:22,140 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:22" (1/1) ... [2023-11-06 22:26:22,141 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fbf3b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:22, skipping insertion in model container [2023-11-06 22:26:22,141 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:22" (1/1) ... [2023-11-06 22:26:22,166 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:26:22,367 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:26:22,378 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 22:26:22,379 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@47a41f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:22, skipping insertion in model container [2023-11-06 22:26:22,379 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:26:22,379 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 22:26:22,381 INFO L158 Benchmark]: Toolchain (without parser) took 248.17ms. Allocated memory is still 157.3MB. Free memory was 118.7MB in the beginning and 108.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:26:22,382 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 125.8MB. Free memory is still 70.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:26:22,382 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.54ms. Allocated memory is still 157.3MB. Free memory was 118.2MB in the beginning and 108.7MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:26:22,384 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 125.8MB. Free memory is still 70.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.54ms. Allocated memory is still 157.3MB. Free memory was 118.2MB in the beginning and 108.7MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 90]: 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_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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_38403697-bf74-456d-82c8-be51814538cd/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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:26:24,754 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:26:24,877 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 22:26:24,885 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:26:24,889 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:26:24,936 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:26:24,937 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:26:24,938 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:26:24,939 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:26:24,961 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:26:24,962 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:26:24,962 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:26:24,963 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:26:24,965 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:26:24,965 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:26:24,966 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:26:24,966 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:26:24,967 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:26:24,967 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:26:24,968 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:26:24,969 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:26:24,969 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:26:24,970 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:26:24,970 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:26:24,971 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:26:24,971 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:26:24,972 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:26:24,972 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:26:24,973 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:26:24,974 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:26:24,975 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:26:24,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:26:24,976 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:26:24,976 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:26:24,976 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:26:24,977 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:26:24,977 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:26:24,977 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:26:24,978 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:26:24,979 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:26:24,979 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:26:24,980 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_38403697-bf74-456d-82c8-be51814538cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2023-11-06 22:26:25,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:26:25,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:26:25,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:26:25,431 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:26:25,431 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:26:25,433 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-06 22:26:28,498 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:26:28,782 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:26:28,782 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-06 22:26:28,792 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/data/12b4afbef/069f3458e15041639527a41885246c4e/FLAG9311b0ea1 [2023-11-06 22:26:28,805 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/data/12b4afbef/069f3458e15041639527a41885246c4e [2023-11-06 22:26:28,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:26:28,809 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:26:28,810 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:26:28,810 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:26:28,815 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:26:28,816 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:28" (1/1) ... [2023-11-06 22:26:28,817 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7551dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:28, skipping insertion in model container [2023-11-06 22:26:28,818 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:28" (1/1) ... [2023-11-06 22:26:28,842 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:26:29,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:26:29,088 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:26:29,103 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:26:29,131 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:26:29,142 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:26:29,184 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:26:29,204 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:26:29,204 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:26:29,212 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:26:29,212 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:29 WrapperNode [2023-11-06 22:26:29,213 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:26:29,214 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:26:29,215 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:26:29,215 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:26:29,223 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:29" (1/1) ... [2023-11-06 22:26:29,248 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:29" (1/1) ... [2023-11-06 22:26:29,290 INFO L138 Inliner]: procedures = 28, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 140 [2023-11-06 22:26:29,290 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:26:29,292 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:26:29,292 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:26:29,292 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:26:29,302 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:29" (1/1) ... [2023-11-06 22:26:29,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:29" (1/1) ... [2023-11-06 22:26:29,321 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:29" (1/1) ... [2023-11-06 22:26:29,322 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:29" (1/1) ... [2023-11-06 22:26:29,336 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:29" (1/1) ... [2023-11-06 22:26:29,350 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:29" (1/1) ... [2023-11-06 22:26:29,353 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:29" (1/1) ... [2023-11-06 22:26:29,359 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:29" (1/1) ... [2023-11-06 22:26:29,363 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:26:29,367 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:26:29,367 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:26:29,368 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:26:29,369 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:29" (1/1) ... [2023-11-06 22:26:29,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:26:29,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:29,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:26:29,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:26:29,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:26:29,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:26:29,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:26:29,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 22:26:29,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:26:29,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:26:29,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:26:29,452 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:26:29,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:26:29,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:26:29,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:26:29,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:26:29,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:26:29,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:26:29,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:26:29,457 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 22:26:29,581 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:26:29,583 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:26:30,025 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:26:30,259 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:26:30,259 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:26:30,262 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:30 BoogieIcfgContainer [2023-11-06 22:26:30,262 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:26:30,264 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:26:30,264 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:26:30,268 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:26:30,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:26:28" (1/3) ... [2023-11-06 22:26:30,269 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c89508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:30, skipping insertion in model container [2023-11-06 22:26:30,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:29" (2/3) ... [2023-11-06 22:26:30,269 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c89508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:30, skipping insertion in model container [2023-11-06 22:26:30,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:30" (3/3) ... [2023-11-06 22:26:30,271 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-11-06 22:26:30,289 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:26:30,290 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-06 22:26:30,290 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:26:30,375 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:26:30,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 137 transitions, 288 flow [2023-11-06 22:26:30,514 INFO L124 PetriNetUnfolderBase]: 9/135 cut-off events. [2023-11-06 22:26:30,514 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:26:30,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 135 events. 9/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 136 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-11-06 22:26:30,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 137 transitions, 288 flow [2023-11-06 22:26:30,536 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 130 transitions, 272 flow [2023-11-06 22:26:30,540 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:26:30,554 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 130 transitions, 272 flow [2023-11-06 22:26:30,559 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 130 transitions, 272 flow [2023-11-06 22:26:30,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 130 transitions, 272 flow [2023-11-06 22:26:30,605 INFO L124 PetriNetUnfolderBase]: 9/130 cut-off events. [2023-11-06 22:26:30,605 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:26:30,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 130 events. 9/130 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 136 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-11-06 22:26:30,610 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2023-11-06 22:26:48,807 INFO L134 LiptonReduction]: Checked pairs total: 1124 [2023-11-06 22:26:48,807 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-11-06 22:26:48,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:26:48,833 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;@480b22fe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:26:48,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-06 22:26:48,841 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:26:48,841 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:26:48,841 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:26:48,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:48,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:26:48,843 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:26:48,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:48,850 INFO L85 PathProgramCache]: Analyzing trace with hash 20545, now seen corresponding path program 1 times [2023-11-06 22:26:48,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:26:48,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287192098] [2023-11-06 22:26:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:48,865 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 22:26:48,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:26:48,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:48,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:48,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:26:48,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:49,120 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 22:26:49,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:49,140 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 22:26:49,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:49,164 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:26:49,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:49,176 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 22:26:49,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:49,199 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 22:26:49,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:49,223 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 22:26:49,250 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 22:26:49,250 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:49,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:26:49,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287192098] [2023-11-06 22:26:49,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287192098] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:49,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:49,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:26:49,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598001000] [2023-11-06 22:26:49,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:49,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:49,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:26:49,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:49,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:49,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 277 [2023-11-06 22:26:49,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:49,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:49,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 277 [2023-11-06 22:26:49,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:49,796 INFO L124 PetriNetUnfolderBase]: 330/480 cut-off events. [2023-11-06 22:26:49,797 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-06 22:26:49,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 480 events. 330/480 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 1853 event pairs, 149 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 831. Up to 474 conditions per place. [2023-11-06 22:26:49,804 INFO L140 encePairwiseOnDemand]: 270/277 looper letters, 29 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2023-11-06 22:26:49,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 36 transitions, 152 flow [2023-11-06 22:26:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:49,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 384 transitions. [2023-11-06 22:26:49,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4620938628158845 [2023-11-06 22:26:49,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 384 transitions. [2023-11-06 22:26:49,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 384 transitions. [2023-11-06 22:26:49,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:49,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 384 transitions. [2023-11-06 22:26:49,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:49,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:49,850 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:49,853 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 384 transitions. [2023-11-06 22:26:49,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 36 transitions, 152 flow [2023-11-06 22:26:49,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:26:49,860 INFO L231 Difference]: Finished difference. Result has 34 places, 35 transitions, 99 flow [2023-11-06 22:26:49,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=34, PETRI_TRANSITIONS=35} [2023-11-06 22:26:49,866 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2023-11-06 22:26:49,866 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 35 transitions, 99 flow [2023-11-06 22:26:49,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:49,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:49,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:26:49,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-06 22:26:50,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:50,084 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:26:50,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:50,085 INFO L85 PathProgramCache]: Analyzing trace with hash 20543, now seen corresponding path program 1 times [2023-11-06 22:26:50,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:26:50,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840457062] [2023-11-06 22:26:50,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:50,086 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 22:26:50,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:26:50,092 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:50,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:50,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:26:50,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:50,167 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 7 [2023-11-06 22:26:50,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:50,180 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 22:26:50,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:50,188 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 22:26:50,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:50,196 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 22:26:50,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:50,203 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 22:26:50,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:50,211 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 22:26:50,214 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 22:26:50,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:50,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:26:50,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840457062] [2023-11-06 22:26:50,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840457062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:50,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:50,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:26:50,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722079622] [2023-11-06 22:26:50,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:50,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:50,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:26:50,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:50,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:50,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 277 [2023-11-06 22:26:50,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:50,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:50,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 277 [2023-11-06 22:26:50,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:50,583 INFO L124 PetriNetUnfolderBase]: 330/478 cut-off events. [2023-11-06 22:26:50,583 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:26:50,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 975 conditions, 478 events. 330/478 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 1848 event pairs, 149 based on Foata normal form. 2/140 useless extension candidates. Maximal degree in co-relation 937. Up to 470 conditions per place. [2023-11-06 22:26:50,589 INFO L140 encePairwiseOnDemand]: 272/277 looper letters, 25 selfloop transitions, 7 changer transitions 0/34 dead transitions. [2023-11-06 22:26:50,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 161 flow [2023-11-06 22:26:50,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:50,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:50,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2023-11-06 22:26:50,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.457280385078219 [2023-11-06 22:26:50,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2023-11-06 22:26:50,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2023-11-06 22:26:50,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:50,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2023-11-06 22:26:50,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:50,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:50,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:50,604 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 99 flow. Second operand 3 states and 380 transitions. [2023-11-06 22:26:50,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 161 flow [2023-11-06 22:26:50,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 34 transitions, 154 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:26:50,606 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 104 flow [2023-11-06 22:26:50,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-11-06 22:26:50,607 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2023-11-06 22:26:50,607 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 104 flow [2023-11-06 22:26:50,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:50,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:50,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:26:50,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:50,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:50,820 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:26:50,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:50,821 INFO L85 PathProgramCache]: Analyzing trace with hash 638609, now seen corresponding path program 1 times [2023-11-06 22:26:50,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:26:50,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442975223] [2023-11-06 22:26:50,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:50,822 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 22:26:50,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:26:50,823 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:50,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:50,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:26:50,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:50,948 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 22:26:50,949 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-06 22:26:50,976 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:26:50,977 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-06 22:26:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:26:51,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:51,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:26:51,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442975223] [2023-11-06 22:26:51,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442975223] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:51,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:51,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:26:51,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730863857] [2023-11-06 22:26:51,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:51,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:51,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:26:51,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:51,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:51,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 277 [2023-11-06 22:26:51,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:51,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:51,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 277 [2023-11-06 22:26:51,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:51,454 INFO L124 PetriNetUnfolderBase]: 253/375 cut-off events. [2023-11-06 22:26:51,454 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:26:51,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767 conditions, 375 events. 253/375 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 1351 event pairs, 113 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 735. Up to 370 conditions per place. [2023-11-06 22:26:51,458 INFO L140 encePairwiseOnDemand]: 274/277 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-11-06 22:26:51,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 148 flow [2023-11-06 22:26:51,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:51,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-11-06 22:26:51,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452466907340554 [2023-11-06 22:26:51,460 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-11-06 22:26:51,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-11-06 22:26:51,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:51,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-11-06 22:26:51,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:51,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:51,479 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:51,479 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 104 flow. Second operand 3 states and 370 transitions. [2023-11-06 22:26:51,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 148 flow [2023-11-06 22:26:51,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:26:51,481 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 82 flow [2023-11-06 22:26:51,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2023-11-06 22:26:51,482 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2023-11-06 22:26:51,482 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 82 flow [2023-11-06 22:26:51,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:51,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:51,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:26:51,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:51,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:51,697 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:26:51,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:51,697 INFO L85 PathProgramCache]: Analyzing trace with hash 638608, now seen corresponding path program 1 times [2023-11-06 22:26:51,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:26:51,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920086783] [2023-11-06 22:26:51,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:51,698 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 22:26:51,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:26:51,700 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:51,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:51,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:26:51,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:51,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:51,859 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:26:51,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-06 22:26:51,872 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:26:51,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:51,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:51,910 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 13 [2023-11-06 22:26:51,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:51,921 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 22:26:52,063 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 22:26:52,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:52,251 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 22:26:52,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:26:52,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920086783] [2023-11-06 22:26:52,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920086783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:52,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:26:52,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 22:26:52,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164944798] [2023-11-06 22:26:52,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:52,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:26:52,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:26:52,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:26:52,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:26:52,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 277 [2023-11-06 22:26:52,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:52,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:52,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 277 [2023-11-06 22:26:52,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:53,588 INFO L124 PetriNetUnfolderBase]: 256/383 cut-off events. [2023-11-06 22:26:53,588 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:26:53,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 383 events. 256/383 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 1458 event pairs, 113 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 779. Up to 369 conditions per place. [2023-11-06 22:26:53,592 INFO L140 encePairwiseOnDemand]: 272/277 looper letters, 27 selfloop transitions, 10 changer transitions 0/39 dead transitions. [2023-11-06 22:26:53,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 188 flow [2023-11-06 22:26:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:26:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:26:53,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 677 transitions. [2023-11-06 22:26:53,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073405535499398 [2023-11-06 22:26:53,596 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 677 transitions. [2023-11-06 22:26:53,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 677 transitions. [2023-11-06 22:26:53,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:53,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 677 transitions. [2023-11-06 22:26:53,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.83333333333333) internal successors, (677), 6 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:53,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:53,605 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:53,605 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 82 flow. Second operand 6 states and 677 transitions. [2023-11-06 22:26:53,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 188 flow [2023-11-06 22:26:53,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 39 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:26:53,607 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 154 flow [2023-11-06 22:26:53,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2023-11-06 22:26:53,608 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2023-11-06 22:26:53,608 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 154 flow [2023-11-06 22:26:53,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:53,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:53,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:26:53,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:53,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:53,824 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:26:53,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:53,825 INFO L85 PathProgramCache]: Analyzing trace with hash 638561, now seen corresponding path program 1 times [2023-11-06 22:26:53,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:26:53,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772516486] [2023-11-06 22:26:53,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:53,825 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 22:26:53,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:26:53,826 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:53,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:53,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:26:53,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:53,910 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 22:26:53,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:53,943 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 22:26:53,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:53,962 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 22:26:53,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:53,982 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 22:26:53,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:53,997 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 22:26:54,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:54,004 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:26:54,069 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 22:26:54,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:54,283 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 22:26:54,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:26:54,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772516486] [2023-11-06 22:26:54,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772516486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:54,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:26:54,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 22:26:54,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731049809] [2023-11-06 22:26:54,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:54,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:26:54,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:26:54,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:26:54,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:26:55,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 277 [2023-11-06 22:26:55,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:55,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:55,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 277 [2023-11-06 22:26:55,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:55,754 INFO L124 PetriNetUnfolderBase]: 255/380 cut-off events. [2023-11-06 22:26:55,754 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:26:55,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 804 conditions, 380 events. 255/380 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 1429 event pairs, 113 based on Foata normal form. 3/130 useless extension candidates. Maximal degree in co-relation 791. Up to 372 conditions per place. [2023-11-06 22:26:55,758 INFO L140 encePairwiseOnDemand]: 273/277 looper letters, 25 selfloop transitions, 9 changer transitions 0/36 dead transitions. [2023-11-06 22:26:55,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 36 transitions, 216 flow [2023-11-06 22:26:55,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:26:55,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:26:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 703 transitions. [2023-11-06 22:26:55,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229843561973526 [2023-11-06 22:26:55,762 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 703 transitions. [2023-11-06 22:26:55,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 703 transitions. [2023-11-06 22:26:55,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:55,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 703 transitions. [2023-11-06 22:26:55,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.16666666666667) internal successors, (703), 6 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:55,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:55,772 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:55,772 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 154 flow. Second operand 6 states and 703 transitions. [2023-11-06 22:26:55,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 36 transitions, 216 flow [2023-11-06 22:26:55,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 36 transitions, 195 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-06 22:26:55,775 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 145 flow [2023-11-06 22:26:55,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=145, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-11-06 22:26:55,776 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2023-11-06 22:26:55,776 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 145 flow [2023-11-06 22:26:55,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:55,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:55,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:26:55,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:56,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:56,001 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:26:56,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash 19803158, now seen corresponding path program 1 times [2023-11-06 22:26:56,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:26:56,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679833795] [2023-11-06 22:26:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:56,002 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 22:26:56,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:26:56,003 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:56,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:56,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:26:56,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:56,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:56,117 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 22:26:56,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:56,128 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:26:56,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:56,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:56,144 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 22:26:56,148 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:26:56,169 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 22:26:56,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:56,169 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:26:56,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679833795] [2023-11-06 22:26:56,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679833795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:56,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:56,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:26:56,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802709546] [2023-11-06 22:26:56,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:56,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:56,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:26:56,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:56,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:56,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 277 [2023-11-06 22:26:56,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:56,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:56,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 277 [2023-11-06 22:26:56,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:56,466 INFO L124 PetriNetUnfolderBase]: 240/355 cut-off events. [2023-11-06 22:26:56,466 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:26:56,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 355 events. 240/355 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 1324 event pairs, 106 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 740. Up to 350 conditions per place. [2023-11-06 22:26:56,469 INFO L140 encePairwiseOnDemand]: 274/277 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-11-06 22:26:56,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 205 flow [2023-11-06 22:26:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:56,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:56,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-11-06 22:26:56,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4536702767749699 [2023-11-06 22:26:56,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-11-06 22:26:56,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-11-06 22:26:56,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:56,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-11-06 22:26:56,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:56,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:56,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:56,478 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 145 flow. Second operand 3 states and 377 transitions. [2023-11-06 22:26:56,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 205 flow [2023-11-06 22:26:56,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 34 transitions, 177 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-06 22:26:56,485 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 115 flow [2023-11-06 22:26:56,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2023-11-06 22:26:56,488 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-11-06 22:26:56,489 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 115 flow [2023-11-06 22:26:56,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:56,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:56,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:26:56,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:56,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:56,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:26:56,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:56,701 INFO L85 PathProgramCache]: Analyzing trace with hash 19803156, now seen corresponding path program 1 times [2023-11-06 22:26:56,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:26:56,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645297250] [2023-11-06 22:26:56,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:56,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:26:56,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:26:56,703 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:56,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:56,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:26:56,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:56,791 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:26:56,791 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 22:26:56,814 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:26:56,815 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 22:26:56,843 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:26:56,843 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 22:26:56,900 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 22:26:56,900 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:56,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:26:56,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645297250] [2023-11-06 22:26:56,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645297250] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:56,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:56,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:26:56,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946667444] [2023-11-06 22:26:56,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:56,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:56,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:26:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:57,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 277 [2023-11-06 22:26:57,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:57,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:57,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 277 [2023-11-06 22:26:57,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:57,226 INFO L124 PetriNetUnfolderBase]: 225/330 cut-off events. [2023-11-06 22:26:57,226 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-06 22:26:57,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 330 events. 225/330 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 1188 event pairs, 99 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 674. Up to 325 conditions per place. [2023-11-06 22:26:57,229 INFO L140 encePairwiseOnDemand]: 274/277 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-11-06 22:26:57,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 171 flow [2023-11-06 22:26:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-11-06 22:26:57,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4404332129963899 [2023-11-06 22:26:57,232 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-11-06 22:26:57,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-11-06 22:26:57,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:57,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-11-06 22:26:57,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:57,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:57,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:57,236 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 115 flow. Second operand 3 states and 366 transitions. [2023-11-06 22:26:57,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 171 flow [2023-11-06 22:26:57,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:26:57,239 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 112 flow [2023-11-06 22:26:57,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-11-06 22:26:57,239 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2023-11-06 22:26:57,240 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 112 flow [2023-11-06 22:26:57,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:57,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:57,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:26:57,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:57,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:57,452 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:26:57,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:57,453 INFO L85 PathProgramCache]: Analyzing trace with hash 613894335, now seen corresponding path program 1 times [2023-11-06 22:26:57,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:26:57,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001971871] [2023-11-06 22:26:57,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:57,453 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 22:26:57,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:26:57,455 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:57,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:57,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:26:57,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:57,544 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 22:26:57,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:57,558 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 22:26:57,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:57,566 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 22:26:57,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:57,575 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 22:26:57,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:57,582 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 22:26:57,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:57,592 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 22:26:57,680 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 22:26:57,681 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:57,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:26:57,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001971871] [2023-11-06 22:26:57,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001971871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:57,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:57,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:26:57,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232211131] [2023-11-06 22:26:57,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:57,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:26:57,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:26:57,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:26:57,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:26:57,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 277 [2023-11-06 22:26:57,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:57,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:57,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 277 [2023-11-06 22:26:57,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:58,287 INFO L124 PetriNetUnfolderBase]: 271/410 cut-off events. [2023-11-06 22:26:58,288 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 22:26:58,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 410 events. 271/410 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 1610 event pairs, 58 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 838. Up to 295 conditions per place. [2023-11-06 22:26:58,291 INFO L140 encePairwiseOnDemand]: 270/277 looper letters, 32 selfloop transitions, 10 changer transitions 0/43 dead transitions. [2023-11-06 22:26:58,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 219 flow [2023-11-06 22:26:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:26:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:26:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 590 transitions. [2023-11-06 22:26:58,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4259927797833935 [2023-11-06 22:26:58,295 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 590 transitions. [2023-11-06 22:26:58,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 590 transitions. [2023-11-06 22:26:58,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:58,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 590 transitions. [2023-11-06 22:26:58,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:58,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:58,302 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:58,302 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 112 flow. Second operand 5 states and 590 transitions. [2023-11-06 22:26:58,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 219 flow [2023-11-06 22:26:58,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:26:58,306 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 144 flow [2023-11-06 22:26:58,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-11-06 22:26:58,310 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-11-06 22:26:58,310 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 144 flow [2023-11-06 22:26:58,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:58,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:58,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:26:58,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:58,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:58,531 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:26:58,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:58,531 INFO L85 PathProgramCache]: Analyzing trace with hash 613894334, now seen corresponding path program 1 times [2023-11-06 22:26:58,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:26:58,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441518604] [2023-11-06 22:26:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:58,532 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 22:26:58,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:26:58,533 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:58,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:58,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:26:58,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:58,603 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 22:26:58,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:58,610 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 22:26:58,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:58,626 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 22:26:58,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:58,640 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 22:26:58,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:58,650 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 22:26:58,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:58,657 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 22:26:58,675 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 22:26:58,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:58,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:26:58,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441518604] [2023-11-06 22:26:58,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441518604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:58,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:58,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:26:58,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615683462] [2023-11-06 22:26:58,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:58,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:26:58,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:26:58,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:26:58,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:26:58,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 277 [2023-11-06 22:26:58,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:58,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:58,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 277 [2023-11-06 22:26:58,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:59,032 INFO L124 PetriNetUnfolderBase]: 127/202 cut-off events. [2023-11-06 22:26:59,033 INFO L125 PetriNetUnfolderBase]: For 48/59 co-relation queries the response was YES. [2023-11-06 22:26:59,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 202 events. 127/202 cut-off events. For 48/59 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 663 event pairs, 60 based on Foata normal form. 36/135 useless extension candidates. Maximal degree in co-relation 516. Up to 191 conditions per place. [2023-11-06 22:26:59,035 INFO L140 encePairwiseOnDemand]: 272/277 looper letters, 23 selfloop transitions, 7 changer transitions 0/32 dead transitions. [2023-11-06 22:26:59,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 200 flow [2023-11-06 22:26:59,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:26:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:26:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2023-11-06 22:26:59,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427797833935018 [2023-11-06 22:26:59,038 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 474 transitions. [2023-11-06 22:26:59,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 474 transitions. [2023-11-06 22:26:59,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:59,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 474 transitions. [2023-11-06 22:26:59,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:59,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:59,044 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:59,044 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 144 flow. Second operand 4 states and 474 transitions. [2023-11-06 22:26:59,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 200 flow [2023-11-06 22:26:59,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 32 transitions, 181 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-06 22:26:59,046 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 135 flow [2023-11-06 22:26:59,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-11-06 22:26:59,047 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-11-06 22:26:59,047 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 135 flow [2023-11-06 22:26:59,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:59,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:59,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:26:59,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:59,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:59,259 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:26:59,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:59,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1850979832, now seen corresponding path program 1 times [2023-11-06 22:26:59,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:26:59,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91036873] [2023-11-06 22:26:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:59,260 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:26:59,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:26:59,261 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:59,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:59,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:26:59,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:59,384 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 22:26:59,385 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:59,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:26:59,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91036873] [2023-11-06 22:26:59,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91036873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:59,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:59,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:26:59,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832413629] [2023-11-06 22:26:59,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:59,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:26:59,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:26:59,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:26:59,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:26:59,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 277 [2023-11-06 22:26:59,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:59,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:59,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 277 [2023-11-06 22:26:59,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:59,627 INFO L124 PetriNetUnfolderBase]: 86/144 cut-off events. [2023-11-06 22:26:59,627 INFO L125 PetriNetUnfolderBase]: For 39/46 co-relation queries the response was YES. [2023-11-06 22:26:59,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 144 events. 86/144 cut-off events. For 39/46 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 411 event pairs, 39 based on Foata normal form. 8/98 useless extension candidates. Maximal degree in co-relation 340. Up to 140 conditions per place. [2023-11-06 22:26:59,629 INFO L140 encePairwiseOnDemand]: 274/277 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-11-06 22:26:59,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 30 transitions, 177 flow [2023-11-06 22:26:59,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:59,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-11-06 22:26:59,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43922984356197353 [2023-11-06 22:26:59,632 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-11-06 22:26:59,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-11-06 22:26:59,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:59,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-11-06 22:26:59,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:59,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:59,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:59,636 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 135 flow. Second operand 3 states and 365 transitions. [2023-11-06 22:26:59,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 30 transitions, 177 flow [2023-11-06 22:26:59,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 148 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-11-06 22:26:59,639 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 94 flow [2023-11-06 22:26:59,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-11-06 22:26:59,641 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2023-11-06 22:26:59,641 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 94 flow [2023-11-06 22:26:59,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:59,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:59,642 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:26:59,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:59,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:59,852 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:26:59,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1845155905, now seen corresponding path program 2 times [2023-11-06 22:26:59,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:26:59,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560298003] [2023-11-06 22:26:59,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:26:59,854 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 22:26:59,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:26:59,855 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:59,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:26:59,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:26:59,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:59,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:26:59,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:59,978 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 22:26:59,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:26:59,991 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 22:26:59,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:00,000 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 22:27:00,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:00,010 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 22:27:00,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:00,023 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 22:27:00,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:00,048 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 22:27:00,231 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 22:27:00,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:00,983 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 22:27:00,983 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:27:00,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560298003] [2023-11-06 22:27:00,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560298003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:00,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:27:00,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:27:00,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787140824] [2023-11-06 22:27:00,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:00,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:27:00,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:27:00,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:27:00,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:27:04,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 277 [2023-11-06 22:27:04,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 94 flow. Second operand has 12 states, 12 states have (on average 113.0) internal successors, (1356), 12 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:04,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:04,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 277 [2023-11-06 22:27:04,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:06,295 INFO L124 PetriNetUnfolderBase]: 92/156 cut-off events. [2023-11-06 22:27:06,295 INFO L125 PetriNetUnfolderBase]: For 16/23 co-relation queries the response was YES. [2023-11-06 22:27:06,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 156 events. 92/156 cut-off events. For 16/23 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 475 event pairs, 39 based on Foata normal form. 7/101 useless extension candidates. Maximal degree in co-relation 366. Up to 143 conditions per place. [2023-11-06 22:27:06,297 INFO L140 encePairwiseOnDemand]: 273/277 looper letters, 19 selfloop transitions, 21 changer transitions 0/42 dead transitions. [2023-11-06 22:27:06,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 222 flow [2023-11-06 22:27:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:27:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:27:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1388 transitions. [2023-11-06 22:27:06,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175691937424789 [2023-11-06 22:27:06,303 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1388 transitions. [2023-11-06 22:27:06,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1388 transitions. [2023-11-06 22:27:06,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:06,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1388 transitions. [2023-11-06 22:27:06,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.66666666666667) internal successors, (1388), 12 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:06,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 277.0) internal successors, (3601), 13 states have internal predecessors, (3601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:06,316 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 277.0) internal successors, (3601), 13 states have internal predecessors, (3601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:06,316 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 94 flow. Second operand 12 states and 1388 transitions. [2023-11-06 22:27:06,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 222 flow [2023-11-06 22:27:06,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:27:06,319 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 217 flow [2023-11-06 22:27:06,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=217, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-11-06 22:27:06,320 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 13 predicate places. [2023-11-06 22:27:06,320 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 217 flow [2023-11-06 22:27:06,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 113.0) internal successors, (1356), 12 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:06,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:06,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:27:06,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:06,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:06,533 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:27:06,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:06,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1850857466, now seen corresponding path program 1 times [2023-11-06 22:27:06,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:27:06,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131692894] [2023-11-06 22:27:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:06,534 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 22:27:06,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:27:06,536 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:06,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:06,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:27:06,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:06,650 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 22:27:06,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:06,670 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 22:27:06,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:06,686 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 22:27:06,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:06,694 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 22:27:06,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:06,721 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 22:27:06,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:06,745 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 22:27:06,874 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 22:27:06,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:27:06,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:27:06,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131692894] [2023-11-06 22:27:06,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131692894] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:06,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:27:06,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:27:06,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690274152] [2023-11-06 22:27:06,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:06,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:27:06,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:27:06,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:27:06,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:27:07,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 277 [2023-11-06 22:27:07,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:07,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:07,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 277 [2023-11-06 22:27:07,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:07,663 INFO L124 PetriNetUnfolderBase]: 138/246 cut-off events. [2023-11-06 22:27:07,663 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-06 22:27:07,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 637 conditions, 246 events. 138/246 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 917 event pairs, 67 based on Foata normal form. 8/180 useless extension candidates. Maximal degree in co-relation 618. Up to 185 conditions per place. [2023-11-06 22:27:07,666 INFO L140 encePairwiseOnDemand]: 270/277 looper letters, 53 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2023-11-06 22:27:07,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 376 flow [2023-11-06 22:27:07,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:27:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:27:07,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 591 transitions. [2023-11-06 22:27:07,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42671480144404333 [2023-11-06 22:27:07,670 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 591 transitions. [2023-11-06 22:27:07,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 591 transitions. [2023-11-06 22:27:07,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:07,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 591 transitions. [2023-11-06 22:27:07,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.2) internal successors, (591), 5 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:07,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:07,695 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:07,695 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 217 flow. Second operand 5 states and 591 transitions. [2023-11-06 22:27:07,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 376 flow [2023-11-06 22:27:07,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 59 transitions, 340 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-11-06 22:27:07,699 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 214 flow [2023-11-06 22:27:07,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-11-06 22:27:07,700 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2023-11-06 22:27:07,701 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 214 flow [2023-11-06 22:27:07,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:07,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:07,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:07,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:07,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:07,908 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:27:07,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:07,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1545796959, now seen corresponding path program 1 times [2023-11-06 22:27:07,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:27:07,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435627720] [2023-11-06 22:27:07,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:07,909 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 22:27:07,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:27:07,911 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:07,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:07,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:27:07,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:07,990 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 22:27:08,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:08,002 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 22:27:08,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:08,011 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 22:27:08,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:08,016 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 22:27:08,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:08,034 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 22:27:08,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:08,044 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 22:27:08,146 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 22:27:08,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:27:08,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:27:08,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435627720] [2023-11-06 22:27:08,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435627720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:08,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:27:08,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:27:08,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896341418] [2023-11-06 22:27:08,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:08,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:27:08,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:27:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:27:08,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:27:08,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 277 [2023-11-06 22:27:08,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:08,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:08,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 277 [2023-11-06 22:27:08,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:08,702 INFO L124 PetriNetUnfolderBase]: 136/240 cut-off events. [2023-11-06 22:27:08,702 INFO L125 PetriNetUnfolderBase]: For 172/201 co-relation queries the response was YES. [2023-11-06 22:27:08,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 240 events. 136/240 cut-off events. For 172/201 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 861 event pairs, 59 based on Foata normal form. 29/227 useless extension candidates. Maximal degree in co-relation 690. Up to 186 conditions per place. [2023-11-06 22:27:08,705 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 38 selfloop transitions, 15 changer transitions 0/55 dead transitions. [2023-11-06 22:27:08,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 365 flow [2023-11-06 22:27:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:27:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:27:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 583 transitions. [2023-11-06 22:27:08,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093862815884475 [2023-11-06 22:27:08,709 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 583 transitions. [2023-11-06 22:27:08,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 583 transitions. [2023-11-06 22:27:08,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:08,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 583 transitions. [2023-11-06 22:27:08,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:08,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:08,714 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:08,714 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 214 flow. Second operand 5 states and 583 transitions. [2023-11-06 22:27:08,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 365 flow [2023-11-06 22:27:08,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 55 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:27:08,718 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 256 flow [2023-11-06 22:27:08,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-11-06 22:27:08,719 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 18 predicate places. [2023-11-06 22:27:08,719 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 256 flow [2023-11-06 22:27:08,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:08,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:08,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:08,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:08,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:08,930 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:27:08,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:08,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1370961434, now seen corresponding path program 1 times [2023-11-06 22:27:08,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:27:08,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601369982] [2023-11-06 22:27:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:08,938 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 22:27:08,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:27:08,939 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:08,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:09,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:27:09,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:09,060 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 22:27:09,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:09,070 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 22:27:09,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:09,091 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 22:27:09,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:09,102 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 22:27:09,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:09,113 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 22:27:09,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:09,119 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 22:27:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:27:09,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:27:09,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:27:09,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601369982] [2023-11-06 22:27:09,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601369982] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:09,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:27:09,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:27:09,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491479380] [2023-11-06 22:27:09,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:09,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:27:09,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:27:09,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:27:09,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:27:12,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 277 [2023-11-06 22:27:12,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 256 flow. Second operand has 10 states, 10 states have (on average 110.4) internal successors, (1104), 10 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:12,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:12,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 277 [2023-11-06 22:27:12,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:13,258 INFO L124 PetriNetUnfolderBase]: 220/370 cut-off events. [2023-11-06 22:27:13,258 INFO L125 PetriNetUnfolderBase]: For 400/450 co-relation queries the response was YES. [2023-11-06 22:27:13,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1264 conditions, 370 events. 220/370 cut-off events. For 400/450 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1384 event pairs, 26 based on Foata normal form. 48/346 useless extension candidates. Maximal degree in co-relation 1241. Up to 163 conditions per place. [2023-11-06 22:27:13,261 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 72 selfloop transitions, 23 changer transitions 0/96 dead transitions. [2023-11-06 22:27:13,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 96 transitions, 665 flow [2023-11-06 22:27:13,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:27:13,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:27:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1045 transitions. [2023-11-06 22:27:13,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41917368632170077 [2023-11-06 22:27:13,267 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1045 transitions. [2023-11-06 22:27:13,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1045 transitions. [2023-11-06 22:27:13,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:13,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1045 transitions. [2023-11-06 22:27:13,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.11111111111111) internal successors, (1045), 9 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:13,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:13,287 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:13,287 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 256 flow. Second operand 9 states and 1045 transitions. [2023-11-06 22:27:13,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 96 transitions, 665 flow [2023-11-06 22:27:13,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 96 transitions, 616 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-06 22:27:13,291 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 316 flow [2023-11-06 22:27:13,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=316, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2023-11-06 22:27:13,292 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2023-11-06 22:27:13,292 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 316 flow [2023-11-06 22:27:13,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.4) internal successors, (1104), 10 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:13,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:13,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:13,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:13,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:13,508 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:27:13,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:13,509 INFO L85 PathProgramCache]: Analyzing trace with hash -943517826, now seen corresponding path program 1 times [2023-11-06 22:27:13,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:27:13,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745863744] [2023-11-06 22:27:13,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:13,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:27:13,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:27:13,510 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:13,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:13,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:27:13,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:13,645 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 22:27:13,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:13,660 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 22:27:13,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:13,667 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 22:27:13,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:13,677 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 22:27:13,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:13,687 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 22:27:13,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:13,693 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 22:27:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:27:13,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:27:14,275 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:27:14,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745863744] [2023-11-06 22:27:14,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745863744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:14,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:27:14,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:27:14,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874729317] [2023-11-06 22:27:14,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:14,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:27:14,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:27:14,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:27:14,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:27:16,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 277 [2023-11-06 22:27:16,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 316 flow. Second operand has 10 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:16,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:16,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 277 [2023-11-06 22:27:16,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:17,611 INFO L124 PetriNetUnfolderBase]: 432/688 cut-off events. [2023-11-06 22:27:17,611 INFO L125 PetriNetUnfolderBase]: For 981/1019 co-relation queries the response was YES. [2023-11-06 22:27:17,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2606 conditions, 688 events. 432/688 cut-off events. For 981/1019 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2650 event pairs, 112 based on Foata normal form. 38/659 useless extension candidates. Maximal degree in co-relation 2580. Up to 338 conditions per place. [2023-11-06 22:27:17,618 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 109 selfloop transitions, 21 changer transitions 0/132 dead transitions. [2023-11-06 22:27:17,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 132 transitions, 1077 flow [2023-11-06 22:27:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:27:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:27:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1043 transitions. [2023-11-06 22:27:17,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41837144003208987 [2023-11-06 22:27:17,623 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1043 transitions. [2023-11-06 22:27:17,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1043 transitions. [2023-11-06 22:27:17,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:17,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1043 transitions. [2023-11-06 22:27:17,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.88888888888889) internal successors, (1043), 9 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:17,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:17,632 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:17,632 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 316 flow. Second operand 9 states and 1043 transitions. [2023-11-06 22:27:17,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 132 transitions, 1077 flow [2023-11-06 22:27:17,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 132 transitions, 939 flow, removed 54 selfloop flow, removed 3 redundant places. [2023-11-06 22:27:17,639 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 377 flow [2023-11-06 22:27:17,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=377, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2023-11-06 22:27:17,640 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2023-11-06 22:27:17,640 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 377 flow [2023-11-06 22:27:17,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:17,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:17,641 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:17,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:17,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:17,848 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:27:17,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:17,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1470311775, now seen corresponding path program 2 times [2023-11-06 22:27:17,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:27:17,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136298168] [2023-11-06 22:27:17,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:27:17,849 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 22:27:17,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:27:17,850 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:17,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:18,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:27:18,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:27:18,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:27:18,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:18,036 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 22:27:18,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:18,049 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 22:27:18,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:18,059 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 22:27:18,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:18,071 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:27:18,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:18,083 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 22:27:18,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:18,103 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 22:27:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:18,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:19,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:27:19,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136298168] [2023-11-06 22:27:19,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136298168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:19,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:27:19,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-11-06 22:27:19,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633019816] [2023-11-06 22:27:19,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:19,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:27:19,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:27:19,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:27:19,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:27:29,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 277 [2023-11-06 22:27:29,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 377 flow. Second operand has 18 states, 18 states have (on average 103.11111111111111) internal successors, (1856), 18 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:29,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:29,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 277 [2023-11-06 22:27:29,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:34,056 INFO L124 PetriNetUnfolderBase]: 998/1561 cut-off events. [2023-11-06 22:27:34,056 INFO L125 PetriNetUnfolderBase]: For 4117/4275 co-relation queries the response was YES. [2023-11-06 22:27:34,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6594 conditions, 1561 events. 998/1561 cut-off events. For 4117/4275 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6898 event pairs, 412 based on Foata normal form. 192/1699 useless extension candidates. Maximal degree in co-relation 6565. Up to 625 conditions per place. [2023-11-06 22:27:34,074 INFO L140 encePairwiseOnDemand]: 269/277 looper letters, 184 selfloop transitions, 27 changer transitions 0/212 dead transitions. [2023-11-06 22:27:34,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 212 transitions, 1866 flow [2023-11-06 22:27:34,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:27:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:27:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1641 transitions. [2023-11-06 22:27:34,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39494584837545127 [2023-11-06 22:27:34,081 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1641 transitions. [2023-11-06 22:27:34,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1641 transitions. [2023-11-06 22:27:34,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:34,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1641 transitions. [2023-11-06 22:27:34,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 109.4) internal successors, (1641), 15 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:34,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:34,095 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:34,095 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 377 flow. Second operand 15 states and 1641 transitions. [2023-11-06 22:27:34,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 212 transitions, 1866 flow [2023-11-06 22:27:34,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 212 transitions, 1652 flow, removed 90 selfloop flow, removed 3 redundant places. [2023-11-06 22:27:34,110 INFO L231 Difference]: Finished difference. Result has 86 places, 73 transitions, 520 flow [2023-11-06 22:27:34,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=520, PETRI_PLACES=86, PETRI_TRANSITIONS=73} [2023-11-06 22:27:34,111 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 50 predicate places. [2023-11-06 22:27:34,111 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 73 transitions, 520 flow [2023-11-06 22:27:34,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 103.11111111111111) internal successors, (1856), 18 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:34,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:34,112 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:34,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:34,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:34,325 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:27:34,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:34,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2070807809, now seen corresponding path program 2 times [2023-11-06 22:27:34,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:27:34,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834253133] [2023-11-06 22:27:34,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:27:34,327 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 22:27:34,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:27:34,328 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:34,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:34,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:27:34,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:27:34,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:27:34,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:34,542 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 22:27:34,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:34,554 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 22:27:34,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:34,578 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 22:27:34,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:34,589 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 22:27:34,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:34,600 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 22:27:34,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:34,610 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 22:27:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:34,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:36,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:27:36,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834253133] [2023-11-06 22:27:36,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834253133] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:36,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:27:36,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-11-06 22:27:36,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318470187] [2023-11-06 22:27:36,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:36,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:27:36,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:27:36,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:27:36,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:27:45,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 277 [2023-11-06 22:27:45,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 73 transitions, 520 flow. Second operand has 18 states, 18 states have (on average 103.33333333333333) internal successors, (1860), 18 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:45,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:45,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 277 [2023-11-06 22:27:45,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:49,601 INFO L124 PetriNetUnfolderBase]: 1012/1574 cut-off events. [2023-11-06 22:27:49,601 INFO L125 PetriNetUnfolderBase]: For 3733/3807 co-relation queries the response was YES. [2023-11-06 22:27:49,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6830 conditions, 1574 events. 1012/1574 cut-off events. For 3733/3807 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6778 event pairs, 420 based on Foata normal form. 96/1592 useless extension candidates. Maximal degree in co-relation 6796. Up to 632 conditions per place. [2023-11-06 22:27:49,619 INFO L140 encePairwiseOnDemand]: 269/277 looper letters, 174 selfloop transitions, 25 changer transitions 0/203 dead transitions. [2023-11-06 22:27:49,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 203 transitions, 1774 flow [2023-11-06 22:27:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:27:49,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:27:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1638 transitions. [2023-11-06 22:27:49,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39422382671480144 [2023-11-06 22:27:49,628 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1638 transitions. [2023-11-06 22:27:49,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1638 transitions. [2023-11-06 22:27:49,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:49,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1638 transitions. [2023-11-06 22:27:49,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 109.2) internal successors, (1638), 15 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:49,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:49,640 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:49,640 INFO L175 Difference]: Start difference. First operand has 86 places, 73 transitions, 520 flow. Second operand 15 states and 1638 transitions. [2023-11-06 22:27:49,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 203 transitions, 1774 flow [2023-11-06 22:27:49,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 203 transitions, 1701 flow, removed 30 selfloop flow, removed 4 redundant places. [2023-11-06 22:27:49,656 INFO L231 Difference]: Finished difference. Result has 101 places, 88 transitions, 682 flow [2023-11-06 22:27:49,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=682, PETRI_PLACES=101, PETRI_TRANSITIONS=88} [2023-11-06 22:27:49,657 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 65 predicate places. [2023-11-06 22:27:49,658 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 88 transitions, 682 flow [2023-11-06 22:27:49,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 103.33333333333333) internal successors, (1860), 18 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:49,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:49,658 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2023-11-06 22:27:49,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:49,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:49,872 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:27:49,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:49,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1365050054, now seen corresponding path program 3 times [2023-11-06 22:27:49,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:27:49,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894356172] [2023-11-06 22:27:49,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:27:49,873 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 22:27:49,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:27:49,874 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:49,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:50,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:27:50,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:27:50,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:27:50,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:50,184 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 22:27:50,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:50,194 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 22:27:50,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:50,204 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 22:27:50,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:50,210 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 22:27:50,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:50,232 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 22:27:50,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:50,242 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 22:27:50,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-06 22:27:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:27:50,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:27:50,809 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:27:50,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894356172] [2023-11-06 22:27:50,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894356172] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:50,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:27:50,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-06 22:27:50,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748850695] [2023-11-06 22:27:50,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:50,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:27:50,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:27:50,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:27:50,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:27:52,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 277 [2023-11-06 22:27:52,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 88 transitions, 682 flow. Second operand has 16 states, 16 states have (on average 105.25) internal successors, (1684), 16 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:52,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:27:52,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 277 [2023-11-06 22:27:52,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:27:54,761 INFO L124 PetriNetUnfolderBase]: 1155/1813 cut-off events. [2023-11-06 22:27:54,761 INFO L125 PetriNetUnfolderBase]: For 6560/6771 co-relation queries the response was YES. [2023-11-06 22:27:54,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8891 conditions, 1813 events. 1155/1813 cut-off events. For 6560/6771 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8196 event pairs, 565 based on Foata normal form. 224/1982 useless extension candidates. Maximal degree in co-relation 8851. Up to 1354 conditions per place. [2023-11-06 22:27:54,781 INFO L140 encePairwiseOnDemand]: 270/277 looper letters, 160 selfloop transitions, 18 changer transitions 0/181 dead transitions. [2023-11-06 22:27:54,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 181 transitions, 1723 flow [2023-11-06 22:27:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:27:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:27:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1437 transitions. [2023-11-06 22:27:54,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.399055817828381 [2023-11-06 22:27:54,785 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1437 transitions. [2023-11-06 22:27:54,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1437 transitions. [2023-11-06 22:27:54,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:27:54,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1437 transitions. [2023-11-06 22:27:54,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 110.53846153846153) internal successors, (1437), 13 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:54,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 277.0) internal successors, (3878), 14 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:54,794 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 277.0) internal successors, (3878), 14 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:54,794 INFO L175 Difference]: Start difference. First operand has 101 places, 88 transitions, 682 flow. Second operand 13 states and 1437 transitions. [2023-11-06 22:27:54,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 181 transitions, 1723 flow [2023-11-06 22:27:54,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 181 transitions, 1660 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-11-06 22:27:54,829 INFO L231 Difference]: Finished difference. Result has 113 places, 92 transitions, 752 flow [2023-11-06 22:27:54,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=752, PETRI_PLACES=113, PETRI_TRANSITIONS=92} [2023-11-06 22:27:54,830 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 77 predicate places. [2023-11-06 22:27:54,830 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 92 transitions, 752 flow [2023-11-06 22:27:54,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 105.25) internal successors, (1684), 16 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:54,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:27:54,831 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-11-06 22:27:54,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:55,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:55,045 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:27:55,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:55,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1264901055, now seen corresponding path program 3 times [2023-11-06 22:27:55,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:27:55,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200165473] [2023-11-06 22:27:55,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:27:55,045 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 22:27:55,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:27:55,046 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:27:55,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-06 22:27:55,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:27:55,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:27:55,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:27:55,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:55,312 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 22:27:55,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:55,323 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 22:27:55,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:55,342 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 22:27:55,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:55,351 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 22:27:55,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:55,359 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 22:27:55,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:27:55,368 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 22:27:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:55,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:27:58,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:27:58,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200165473] [2023-11-06 22:27:58,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200165473] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:58,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:27:58,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-11-06 22:27:58,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992637819] [2023-11-06 22:27:58,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:58,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:27:58,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:27:58,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:27:58,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:28:15,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 277 [2023-11-06 22:28:15,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 92 transitions, 752 flow. Second operand has 24 states, 24 states have (on average 113.0) internal successors, (2712), 24 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:15,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:28:15,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 277 [2023-11-06 22:28:15,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:28:32,749 INFO L124 PetriNetUnfolderBase]: 1128/1781 cut-off events. [2023-11-06 22:28:32,749 INFO L125 PetriNetUnfolderBase]: For 8114/8338 co-relation queries the response was YES. [2023-11-06 22:28:32,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8910 conditions, 1781 events. 1128/1781 cut-off events. For 8114/8338 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8313 event pairs, 652 based on Foata normal form. 197/1879 useless extension candidates. Maximal degree in co-relation 8865. Up to 1716 conditions per place. [2023-11-06 22:28:32,769 INFO L140 encePairwiseOnDemand]: 273/277 looper letters, 63 selfloop transitions, 45 changer transitions 0/116 dead transitions. [2023-11-06 22:28:32,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 116 transitions, 1136 flow [2023-11-06 22:28:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:28:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:28:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2762 transitions. [2023-11-06 22:28:32,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4154632972322503 [2023-11-06 22:28:32,774 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2762 transitions. [2023-11-06 22:28:32,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2762 transitions. [2023-11-06 22:28:32,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:28:32,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2762 transitions. [2023-11-06 22:28:32,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 115.08333333333333) internal successors, (2762), 24 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:32,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 277.0) internal successors, (6925), 25 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:32,808 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 277.0) internal successors, (6925), 25 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:32,808 INFO L175 Difference]: Start difference. First operand has 113 places, 92 transitions, 752 flow. Second operand 24 states and 2762 transitions. [2023-11-06 22:28:32,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 116 transitions, 1136 flow [2023-11-06 22:28:32,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 116 transitions, 1110 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-06 22:28:32,843 INFO L231 Difference]: Finished difference. Result has 141 places, 116 transitions, 1048 flow [2023-11-06 22:28:32,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1048, PETRI_PLACES=141, PETRI_TRANSITIONS=116} [2023-11-06 22:28:32,846 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 105 predicate places. [2023-11-06 22:28:32,846 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 116 transitions, 1048 flow [2023-11-06 22:28:32,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 113.0) internal successors, (2712), 24 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:32,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:28:32,847 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2023-11-06 22:28:32,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:28:33,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:28:33,060 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:28:33,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:28:33,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1794848639, now seen corresponding path program 4 times [2023-11-06 22:28:33,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:28:33,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829394868] [2023-11-06 22:28:33,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:28:33,061 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 22:28:33,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:28:33,062 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:28:33,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-06 22:28:33,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:28:33,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:28:33,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:28:33,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:28:33,306 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 22:28:33,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:33,317 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 22:28:33,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:33,324 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 22:28:33,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:33,336 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 22:28:33,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:33,355 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 18 treesize of output 1 [2023-11-06 22:28:33,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:33,365 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 13 treesize of output 1 [2023-11-06 22:28:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:28:33,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:28:34,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:28:34,908 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:28:34,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829394868] [2023-11-06 22:28:34,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829394868] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:28:34,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:28:34,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-11-06 22:28:34,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012970688] [2023-11-06 22:28:34,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:28:34,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:28:34,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:28:34,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:28:34,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:28:43,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 277 [2023-11-06 22:28:43,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 116 transitions, 1048 flow. Second operand has 16 states, 16 states have (on average 110.25) internal successors, (1764), 16 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:43,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:28:43,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 277 [2023-11-06 22:28:43,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:28:50,652 INFO L124 PetriNetUnfolderBase]: 1831/2785 cut-off events. [2023-11-06 22:28:50,652 INFO L125 PetriNetUnfolderBase]: For 12172/12525 co-relation queries the response was YES. [2023-11-06 22:28:50,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13781 conditions, 2785 events. 1831/2785 cut-off events. For 12172/12525 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 13065 event pairs, 209 based on Foata normal form. 478/3006 useless extension candidates. Maximal degree in co-relation 13724. Up to 790 conditions per place. [2023-11-06 22:28:50,698 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 336 selfloop transitions, 66 changer transitions 0/405 dead transitions. [2023-11-06 22:28:50,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 405 transitions, 4203 flow [2023-11-06 22:28:50,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:28:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:28:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1750 transitions. [2023-11-06 22:28:50,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42117930204572807 [2023-11-06 22:28:50,704 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1750 transitions. [2023-11-06 22:28:50,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1750 transitions. [2023-11-06 22:28:50,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:28:50,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1750 transitions. [2023-11-06 22:28:50,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 116.66666666666667) internal successors, (1750), 15 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 22:28:50,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:50,714 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:50,714 INFO L175 Difference]: Start difference. First operand has 141 places, 116 transitions, 1048 flow. Second operand 15 states and 1750 transitions. [2023-11-06 22:28:50,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 405 transitions, 4203 flow [2023-11-06 22:28:50,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 405 transitions, 4061 flow, removed 50 selfloop flow, removed 11 redundant places. [2023-11-06 22:28:50,769 INFO L231 Difference]: Finished difference. Result has 150 places, 128 transitions, 1172 flow [2023-11-06 22:28:50,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1172, PETRI_PLACES=150, PETRI_TRANSITIONS=128} [2023-11-06 22:28:50,770 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 114 predicate places. [2023-11-06 22:28:50,770 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 128 transitions, 1172 flow [2023-11-06 22:28:50,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 110.25) internal successors, (1764), 16 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:50,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:28:50,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:28:50,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:28:50,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:28:50,985 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:28:50,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:28:50,985 INFO L85 PathProgramCache]: Analyzing trace with hash -2022688604, now seen corresponding path program 1 times [2023-11-06 22:28:50,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:28:50,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363068827] [2023-11-06 22:28:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:28:50,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:28:50,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:28:50,986 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:28:50,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-06 22:28:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:28:51,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:28:51,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:28:51,091 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 22:28:51,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:28:51,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:28:51,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363068827] [2023-11-06 22:28:51,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363068827] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:28:51,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:28:51,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:28:51,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926228696] [2023-11-06 22:28:51,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:28:51,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:28:51,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:28:51,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:28:51,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:28:51,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 277 [2023-11-06 22:28:51,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 128 transitions, 1172 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:51,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:28:51,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 277 [2023-11-06 22:28:51,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:28:51,937 INFO L124 PetriNetUnfolderBase]: 1805/2778 cut-off events. [2023-11-06 22:28:51,937 INFO L125 PetriNetUnfolderBase]: For 13757/14187 co-relation queries the response was YES. [2023-11-06 22:28:51,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15289 conditions, 2778 events. 1805/2778 cut-off events. For 13757/14187 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 12763 event pairs, 473 based on Foata normal form. 349/3019 useless extension candidates. Maximal degree in co-relation 15226. Up to 2576 conditions per place. [2023-11-06 22:28:51,969 INFO L140 encePairwiseOnDemand]: 273/277 looper letters, 128 selfloop transitions, 8 changer transitions 4/147 dead transitions. [2023-11-06 22:28:51,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 147 transitions, 1602 flow [2023-11-06 22:28:51,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:28:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:28:51,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-11-06 22:28:51,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789410348977136 [2023-11-06 22:28:51,972 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-11-06 22:28:51,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-11-06 22:28:51,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:28:51,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-11-06 22:28:51,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:51,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:51,975 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:51,975 INFO L175 Difference]: Start difference. First operand has 150 places, 128 transitions, 1172 flow. Second operand 3 states and 398 transitions. [2023-11-06 22:28:51,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 147 transitions, 1602 flow [2023-11-06 22:28:52,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 147 transitions, 1410 flow, removed 42 selfloop flow, removed 7 redundant places. [2023-11-06 22:28:52,048 INFO L231 Difference]: Finished difference. Result has 146 places, 132 transitions, 1070 flow [2023-11-06 22:28:52,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1070, PETRI_PLACES=146, PETRI_TRANSITIONS=132} [2023-11-06 22:28:52,049 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 110 predicate places. [2023-11-06 22:28:52,049 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 132 transitions, 1070 flow [2023-11-06 22:28:52,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:52,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:28:52,050 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:28:52,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:28:52,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:28:52,266 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:28:52,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:28:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash 692579742, now seen corresponding path program 3 times [2023-11-06 22:28:52,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:28:52,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638926457] [2023-11-06 22:28:52,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:28:52,267 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 22:28:52,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:28:52,268 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:28:52,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-06 22:28:52,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:28:52,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:28:52,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:28:52,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:28:52,635 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 22:28:52,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,656 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 22:28:52,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,664 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 22:28:52,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,674 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 22:28:52,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,682 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 22:28:52,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:28:52,692 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 22:28:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:28:53,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:28:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:28:53,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:28:53,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638926457] [2023-11-06 22:28:53,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638926457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:28:53,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:28:53,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-11-06 22:28:53,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53515587] [2023-11-06 22:28:53,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:28:53,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:28:53,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:28:53,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:28:53,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:28:58,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 277 [2023-11-06 22:28:58,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 132 transitions, 1070 flow. Second operand has 18 states, 18 states have (on average 106.44444444444444) internal successors, (1916), 18 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:28:58,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:28:58,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 277 [2023-11-06 22:28:58,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:03,793 INFO L124 PetriNetUnfolderBase]: 1534/2419 cut-off events. [2023-11-06 22:29:03,793 INFO L125 PetriNetUnfolderBase]: For 9950/10050 co-relation queries the response was YES. [2023-11-06 22:29:03,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11555 conditions, 2419 events. 1534/2419 cut-off events. For 9950/10050 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11061 event pairs, 666 based on Foata normal form. 134/2505 useless extension candidates. Maximal degree in co-relation 11491. Up to 1216 conditions per place. [2023-11-06 22:29:03,820 INFO L140 encePairwiseOnDemand]: 270/277 looper letters, 259 selfloop transitions, 30 changer transitions 0/293 dead transitions. [2023-11-06 22:29:03,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 293 transitions, 2775 flow [2023-11-06 22:29:03,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:29:03,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:29:03,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1677 transitions. [2023-11-06 22:29:03,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4036101083032491 [2023-11-06 22:29:03,826 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1677 transitions. [2023-11-06 22:29:03,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1677 transitions. [2023-11-06 22:29:03,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:03,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1677 transitions. [2023-11-06 22:29:03,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 111.8) internal successors, (1677), 15 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:03,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:03,839 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:03,839 INFO L175 Difference]: Start difference. First operand has 146 places, 132 transitions, 1070 flow. Second operand 15 states and 1677 transitions. [2023-11-06 22:29:03,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 293 transitions, 2775 flow [2023-11-06 22:29:03,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 293 transitions, 2757 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 22:29:03,928 INFO L231 Difference]: Finished difference. Result has 155 places, 136 transitions, 1161 flow [2023-11-06 22:29:03,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1161, PETRI_PLACES=155, PETRI_TRANSITIONS=136} [2023-11-06 22:29:03,929 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 119 predicate places. [2023-11-06 22:29:03,930 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 136 transitions, 1161 flow [2023-11-06 22:29:03,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 106.44444444444444) internal successors, (1916), 18 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:03,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:03,931 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:03,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:04,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:29:04,145 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:29:04,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:04,145 INFO L85 PathProgramCache]: Analyzing trace with hash 571473183, now seen corresponding path program 4 times [2023-11-06 22:29:04,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:29:04,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47405836] [2023-11-06 22:29:04,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:29:04,146 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 22:29:04,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:29:04,148 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:29:04,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (24)] Waiting until timeout for monitored process [2023-11-06 22:29:04,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:29:04,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:29:04,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:29:04,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:04,436 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 22:29:04,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:04,459 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 22:29:04,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:04,467 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 22:29:04,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:04,497 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 22:29:04,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:04,505 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 22:29:04,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:29:04,517 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 22:29:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:29:04,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:29:06,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:29:06,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47405836] [2023-11-06 22:29:06,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47405836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:29:06,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:29:06,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-11-06 22:29:06,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180318482] [2023-11-06 22:29:06,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:29:06,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:29:06,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:29:06,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:29:06,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:29:13,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 277 [2023-11-06 22:29:13,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 136 transitions, 1161 flow. Second operand has 16 states, 16 states have (on average 110.5) internal successors, (1768), 16 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:13,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:13,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 277 [2023-11-06 22:29:13,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:20,565 INFO L124 PetriNetUnfolderBase]: 2212/3369 cut-off events. [2023-11-06 22:29:20,566 INFO L125 PetriNetUnfolderBase]: For 11916/12014 co-relation queries the response was YES. [2023-11-06 22:29:20,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15988 conditions, 3369 events. 2212/3369 cut-off events. For 11916/12014 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 15241 event pairs, 284 based on Foata normal form. 310/3615 useless extension candidates. Maximal degree in co-relation 15924. Up to 928 conditions per place. [2023-11-06 22:29:20,602 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 438 selfloop transitions, 66 changer transitions 0/508 dead transitions. [2023-11-06 22:29:20,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 508 transitions, 4839 flow [2023-11-06 22:29:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:29:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:29:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1748 transitions. [2023-11-06 22:29:20,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4206979542719615 [2023-11-06 22:29:20,609 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1748 transitions. [2023-11-06 22:29:20,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1748 transitions. [2023-11-06 22:29:20,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:20,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1748 transitions. [2023-11-06 22:29:20,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 116.53333333333333) internal successors, (1748), 15 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:20,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:20,622 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:20,622 INFO L175 Difference]: Start difference. First operand has 155 places, 136 transitions, 1161 flow. Second operand 15 states and 1748 transitions. [2023-11-06 22:29:20,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 508 transitions, 4839 flow [2023-11-06 22:29:20,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 508 transitions, 4817 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-06 22:29:20,723 INFO L231 Difference]: Finished difference. Result has 168 places, 148 transitions, 1401 flow [2023-11-06 22:29:20,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1401, PETRI_PLACES=168, PETRI_TRANSITIONS=148} [2023-11-06 22:29:20,724 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 132 predicate places. [2023-11-06 22:29:20,724 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 148 transitions, 1401 flow [2023-11-06 22:29:20,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 110.5) internal successors, (1768), 16 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:20,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:20,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:20,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:20,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:29:20,940 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:29:20,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:20,941 INFO L85 PathProgramCache]: Analyzing trace with hash 950029771, now seen corresponding path program 1 times [2023-11-06 22:29:20,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:29:20,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646232492] [2023-11-06 22:29:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:20,942 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 22:29:20,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:29:20,943 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:29:20,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (25)] Waiting until timeout for monitored process [2023-11-06 22:29:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:21,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:29:21,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:21,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:21,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:29:21,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646232492] [2023-11-06 22:29:21,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646232492] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:21,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:29:21,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-11-06 22:29:21,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561420937] [2023-11-06 22:29:21,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:21,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:29:21,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:29:21,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:29:21,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:29:21,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 277 [2023-11-06 22:29:21,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 148 transitions, 1401 flow. Second operand has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:21,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:21,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 277 [2023-11-06 22:29:21,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:22,332 INFO L124 PetriNetUnfolderBase]: 2018/3073 cut-off events. [2023-11-06 22:29:22,332 INFO L125 PetriNetUnfolderBase]: For 15869/16205 co-relation queries the response was YES. [2023-11-06 22:29:22,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16431 conditions, 3073 events. 2018/3073 cut-off events. For 15869/16205 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 13365 event pairs, 921 based on Foata normal form. 315/3334 useless extension candidates. Maximal degree in co-relation 16361. Up to 2745 conditions per place. [2023-11-06 22:29:22,362 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 169 selfloop transitions, 15 changer transitions 0/188 dead transitions. [2023-11-06 22:29:22,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 188 transitions, 2239 flow [2023-11-06 22:29:22,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:29:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:29:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 573 transitions. [2023-11-06 22:29:22,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41371841155234657 [2023-11-06 22:29:22,364 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 573 transitions. [2023-11-06 22:29:22,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 573 transitions. [2023-11-06 22:29:22,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:22,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 573 transitions. [2023-11-06 22:29:22,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:22,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:22,367 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:22,368 INFO L175 Difference]: Start difference. First operand has 168 places, 148 transitions, 1401 flow. Second operand 5 states and 573 transitions. [2023-11-06 22:29:22,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 188 transitions, 2239 flow [2023-11-06 22:29:22,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 188 transitions, 1943 flow, removed 77 selfloop flow, removed 7 redundant places. [2023-11-06 22:29:22,431 INFO L231 Difference]: Finished difference. Result has 165 places, 145 transitions, 1217 flow [2023-11-06 22:29:22,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1217, PETRI_PLACES=165, PETRI_TRANSITIONS=145} [2023-11-06 22:29:22,432 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 129 predicate places. [2023-11-06 22:29:22,432 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 145 transitions, 1217 flow [2023-11-06 22:29:22,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:22,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:22,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:22,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:22,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:29:22,633 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:29:22,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:22,633 INFO L85 PathProgramCache]: Analyzing trace with hash 734996889, now seen corresponding path program 1 times [2023-11-06 22:29:22,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:29:22,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674476825] [2023-11-06 22:29:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:22,634 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 22:29:22,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:29:22,635 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:29:22,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (26)] Waiting until timeout for monitored process [2023-11-06 22:29:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:22,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:29:22,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:22,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:22,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:29:22,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674476825] [2023-11-06 22:29:22,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674476825] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:29:22,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:29:22,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-11-06 22:29:22,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435082615] [2023-11-06 22:29:22,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:29:22,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:29:22,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:29:22,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:29:22,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:29:23,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 277 [2023-11-06 22:29:23,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 145 transitions, 1217 flow. Second operand has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:23,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:23,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 277 [2023-11-06 22:29:23,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:23,952 INFO L124 PetriNetUnfolderBase]: 2026/3131 cut-off events. [2023-11-06 22:29:23,952 INFO L125 PetriNetUnfolderBase]: For 14247/14309 co-relation queries the response was YES. [2023-11-06 22:29:23,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14774 conditions, 3131 events. 2026/3131 cut-off events. For 14247/14309 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 13852 event pairs, 1046 based on Foata normal form. 146/3214 useless extension candidates. Maximal degree in co-relation 14704. Up to 2750 conditions per place. [2023-11-06 22:29:23,986 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 162 selfloop transitions, 15 changer transitions 0/181 dead transitions. [2023-11-06 22:29:23,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 181 transitions, 1847 flow [2023-11-06 22:29:23,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:29:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:29:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 573 transitions. [2023-11-06 22:29:23,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41371841155234657 [2023-11-06 22:29:23,988 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 573 transitions. [2023-11-06 22:29:23,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 573 transitions. [2023-11-06 22:29:23,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:23,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 573 transitions. [2023-11-06 22:29:23,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:23,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:23,991 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:23,991 INFO L175 Difference]: Start difference. First operand has 165 places, 145 transitions, 1217 flow. Second operand 5 states and 573 transitions. [2023-11-06 22:29:23,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 181 transitions, 1847 flow [2023-11-06 22:29:24,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 181 transitions, 1815 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-06 22:29:24,070 INFO L231 Difference]: Finished difference. Result has 166 places, 141 transitions, 1183 flow [2023-11-06 22:29:24,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1183, PETRI_PLACES=166, PETRI_TRANSITIONS=141} [2023-11-06 22:29:24,071 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 130 predicate places. [2023-11-06 22:29:24,071 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 141 transitions, 1183 flow [2023-11-06 22:29:24,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:24,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:24,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:24,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:24,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:29:24,285 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:29:24,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:24,285 INFO L85 PathProgramCache]: Analyzing trace with hash -466185568, now seen corresponding path program 1 times [2023-11-06 22:29:24,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:29:24,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961995153] [2023-11-06 22:29:24,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:29:24,285 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 22:29:24,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:29:24,286 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:29:24,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (27)] Waiting until timeout for monitored process [2023-11-06 22:29:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:29:24,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:29:24,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:24,562 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 22:29:24,687 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2023-11-06 22:29:24,757 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:24,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 46 [2023-11-06 22:29:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:24,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:25,322 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse3 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse4 (bvadd c_~A~0.offset (_ bv1 32)))) (and (forall ((v_ArrVal_550 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_550) c_~A~0.base))) (concat (concat (concat (select .cse1 .cse2) (select .cse1 .cse3)) (select .cse1 .cse4)) (select .cse1 c_~A~0.offset))))) (or (= (bvadd c_~counter~0 (bvneg .cse0)) (_ bv0 32)) (not (bvsge .cse0 (_ bv0 32)))))) (forall ((v_ArrVal_550 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse5 (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_550) c_~A~0.base))) (concat (concat (concat (select .cse6 .cse2) (select .cse6 .cse3)) (select .cse6 .cse4)) (select .cse6 c_~A~0.offset))))) (or (= (bvadd c_~counter~0 (bvneg .cse5)) (_ bv0 32)) (not (bvsle c_~counter~0 (bvadd (_ bv2147483647 32) .cse5)))))))) is different from false [2023-11-06 22:29:25,559 INFO L322 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-11-06 22:29:25,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 310 treesize of output 166 [2023-11-06 22:29:25,582 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:25,582 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 74 [2023-11-06 22:29:28,157 INFO L322 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-11-06 22:29:28,157 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 220 treesize of output 146 [2023-11-06 22:29:28,177 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:28,178 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 54 [2023-11-06 22:29:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:41,212 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:29:41,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961995153] [2023-11-06 22:29:41,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961995153] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:29:41,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:29:41,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-11-06 22:29:41,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68388936] [2023-11-06 22:29:41,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:29:41,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:29:41,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:29:41,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:29:41,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=157, Unknown=2, NotChecked=26, Total=240 [2023-11-06 22:29:42,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 277 [2023-11-06 22:29:42,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 141 transitions, 1183 flow. Second operand has 16 states, 16 states have (on average 84.125) internal successors, (1346), 16 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:42,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:42,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 277 [2023-11-06 22:29:42,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:46,574 INFO L124 PetriNetUnfolderBase]: 2144/3339 cut-off events. [2023-11-06 22:29:46,574 INFO L125 PetriNetUnfolderBase]: For 15319/15319 co-relation queries the response was YES. [2023-11-06 22:29:46,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15941 conditions, 3339 events. 2144/3339 cut-off events. For 15319/15319 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 14889 event pairs, 528 based on Foata normal form. 3/3291 useless extension candidates. Maximal degree in co-relation 15871. Up to 3015 conditions per place. [2023-11-06 22:29:46,608 INFO L140 encePairwiseOnDemand]: 270/277 looper letters, 142 selfloop transitions, 61 changer transitions 6/209 dead transitions. [2023-11-06 22:29:46,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 209 transitions, 2212 flow [2023-11-06 22:29:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:29:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:29:46,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 628 transitions. [2023-11-06 22:29:46,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32387828777720473 [2023-11-06 22:29:46,611 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 628 transitions. [2023-11-06 22:29:46,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 628 transitions. [2023-11-06 22:29:46,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:46,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 628 transitions. [2023-11-06 22:29:46,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.71428571428571) internal successors, (628), 7 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:46,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:46,614 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:46,614 INFO L175 Difference]: Start difference. First operand has 166 places, 141 transitions, 1183 flow. Second operand 7 states and 628 transitions. [2023-11-06 22:29:46,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 209 transitions, 2212 flow [2023-11-06 22:29:46,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 209 transitions, 2174 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:29:46,685 INFO L231 Difference]: Finished difference. Result has 171 places, 170 transitions, 1711 flow [2023-11-06 22:29:46,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1711, PETRI_PLACES=171, PETRI_TRANSITIONS=170} [2023-11-06 22:29:46,686 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 135 predicate places. [2023-11-06 22:29:46,686 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 170 transitions, 1711 flow [2023-11-06 22:29:46,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 84.125) internal successors, (1346), 16 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:46,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:46,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:46,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:46,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:29:46,887 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:29:46,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:46,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1074655142, now seen corresponding path program 2 times [2023-11-06 22:29:46,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:29:46,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437281196] [2023-11-06 22:29:46,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:29:46,888 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 22:29:46,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:29:46,889 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:29:46,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (28)] Waiting until timeout for monitored process [2023-11-06 22:29:47,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:29:47,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:29:47,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:29:47,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:47,351 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:47,351 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 18 [2023-11-06 22:29:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:47,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:47,757 INFO L322 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-11-06 22:29:47,758 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 89 treesize of output 68 [2023-11-06 22:29:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:49,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:29:49,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437281196] [2023-11-06 22:29:49,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437281196] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:29:49,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:29:49,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-06 22:29:49,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830954758] [2023-11-06 22:29:49,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:29:49,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:29:49,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:29:49,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:29:49,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:29:50,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 277 [2023-11-06 22:29:50,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 170 transitions, 1711 flow. Second operand has 9 states, 9 states have (on average 114.66666666666667) internal successors, (1032), 9 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:50,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:50,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 277 [2023-11-06 22:29:50,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:52,893 INFO L124 PetriNetUnfolderBase]: 2207/3454 cut-off events. [2023-11-06 22:29:52,893 INFO L125 PetriNetUnfolderBase]: For 17580/17580 co-relation queries the response was YES. [2023-11-06 22:29:52,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17185 conditions, 3454 events. 2207/3454 cut-off events. For 17580/17580 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 15652 event pairs, 698 based on Foata normal form. 3/3407 useless extension candidates. Maximal degree in co-relation 17113. Up to 3220 conditions per place. [2023-11-06 22:29:52,927 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 173 selfloop transitions, 43 changer transitions 7/223 dead transitions. [2023-11-06 22:29:52,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 223 transitions, 2731 flow [2023-11-06 22:29:52,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:29:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:29:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 718 transitions. [2023-11-06 22:29:52,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43200962695547535 [2023-11-06 22:29:52,930 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 718 transitions. [2023-11-06 22:29:52,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 718 transitions. [2023-11-06 22:29:52,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:52,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 718 transitions. [2023-11-06 22:29:52,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 119.66666666666667) internal successors, (718), 6 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:52,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:52,932 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:52,932 INFO L175 Difference]: Start difference. First operand has 171 places, 170 transitions, 1711 flow. Second operand 6 states and 718 transitions. [2023-11-06 22:29:52,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 223 transitions, 2731 flow [2023-11-06 22:29:53,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 223 transitions, 2606 flow, removed 51 selfloop flow, removed 1 redundant places. [2023-11-06 22:29:53,008 INFO L231 Difference]: Finished difference. Result has 178 places, 199 transitions, 2172 flow [2023-11-06 22:29:53,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=1618, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2172, PETRI_PLACES=178, PETRI_TRANSITIONS=199} [2023-11-06 22:29:53,009 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 142 predicate places. [2023-11-06 22:29:53,009 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 199 transitions, 2172 flow [2023-11-06 22:29:53,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 114.66666666666667) internal successors, (1032), 9 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:53,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:53,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:53,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:53,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:29:53,223 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:29:53,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:53,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1495554008, now seen corresponding path program 3 times [2023-11-06 22:29:53,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:29:53,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198342698] [2023-11-06 22:29:53,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:29:53,224 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 22:29:53,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:29:53,225 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:29:53,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (29)] Waiting until timeout for monitored process [2023-11-06 22:29:53,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:29:53,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:29:53,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:29:53,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:29:53,685 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:29:53,685 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 18 [2023-11-06 22:29:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:53,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:29:54,159 INFO L322 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-11-06 22:29:54,160 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 89 treesize of output 68 [2023-11-06 22:29:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:29:55,955 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:29:55,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198342698] [2023-11-06 22:29:55,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198342698] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:29:55,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:29:55,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-06 22:29:55,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934688772] [2023-11-06 22:29:55,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:29:55,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:29:55,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:29:55,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:29:55,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:29:57,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 277 [2023-11-06 22:29:57,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 199 transitions, 2172 flow. Second operand has 9 states, 9 states have (on average 114.77777777777777) internal successors, (1033), 9 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:57,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:29:57,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 277 [2023-11-06 22:29:57,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:29:59,472 INFO L124 PetriNetUnfolderBase]: 2253/3530 cut-off events. [2023-11-06 22:29:59,473 INFO L125 PetriNetUnfolderBase]: For 19698/19698 co-relation queries the response was YES. [2023-11-06 22:29:59,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17997 conditions, 3530 events. 2253/3530 cut-off events. For 19698/19698 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 16145 event pairs, 714 based on Foata normal form. 3/3483 useless extension candidates. Maximal degree in co-relation 17921. Up to 3303 conditions per place. [2023-11-06 22:29:59,513 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 186 selfloop transitions, 46 changer transitions 6/238 dead transitions. [2023-11-06 22:29:59,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 238 transitions, 3039 flow [2023-11-06 22:29:59,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:29:59,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:29:59,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 718 transitions. [2023-11-06 22:29:59,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43200962695547535 [2023-11-06 22:29:59,515 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 718 transitions. [2023-11-06 22:29:59,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 718 transitions. [2023-11-06 22:29:59,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:29:59,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 718 transitions. [2023-11-06 22:29:59,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 119.66666666666667) internal successors, (718), 6 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:59,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:59,518 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:59,518 INFO L175 Difference]: Start difference. First operand has 178 places, 199 transitions, 2172 flow. Second operand 6 states and 718 transitions. [2023-11-06 22:29:59,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 238 transitions, 3039 flow [2023-11-06 22:29:59,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 238 transitions, 2943 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-11-06 22:29:59,681 INFO L231 Difference]: Finished difference. Result has 184 places, 214 transitions, 2481 flow [2023-11-06 22:29:59,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2481, PETRI_PLACES=184, PETRI_TRANSITIONS=214} [2023-11-06 22:29:59,682 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 148 predicate places. [2023-11-06 22:29:59,682 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 214 transitions, 2481 flow [2023-11-06 22:29:59,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 114.77777777777777) internal successors, (1033), 9 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:29:59,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:29:59,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:29:59,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:29:59,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:29:59,889 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:29:59,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:29:59,889 INFO L85 PathProgramCache]: Analyzing trace with hash 753440672, now seen corresponding path program 4 times [2023-11-06 22:29:59,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:29:59,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951242268] [2023-11-06 22:29:59,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:29:59,890 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 22:29:59,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:29:59,891 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:29:59,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (30)] Waiting until timeout for monitored process [2023-11-06 22:30:00,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:30:00,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:00,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:30:00,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:00,246 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:00,246 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 18 [2023-11-06 22:30:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:00,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:00,625 INFO L322 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-11-06 22:30:00,625 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 89 treesize of output 68 [2023-11-06 22:30:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:01,877 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:30:01,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951242268] [2023-11-06 22:30:01,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951242268] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:01,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:30:01,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-06 22:30:01,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120775380] [2023-11-06 22:30:01,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:01,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:30:01,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:30:01,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:30:01,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:30:03,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 277 [2023-11-06 22:30:03,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 214 transitions, 2481 flow. Second operand has 9 states, 9 states have (on average 114.44444444444444) internal successors, (1030), 9 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:03,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:03,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 277 [2023-11-06 22:30:03,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:05,512 INFO L124 PetriNetUnfolderBase]: 2285/3588 cut-off events. [2023-11-06 22:30:05,512 INFO L125 PetriNetUnfolderBase]: For 21673/21673 co-relation queries the response was YES. [2023-11-06 22:30:05,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18622 conditions, 3588 events. 2285/3588 cut-off events. For 21673/21673 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 16559 event pairs, 720 based on Foata normal form. 3/3541 useless extension candidates. Maximal degree in co-relation 18543. Up to 3354 conditions per place. [2023-11-06 22:30:05,544 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 195 selfloop transitions, 43 changer transitions 8/246 dead transitions. [2023-11-06 22:30:05,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 246 transitions, 3250 flow [2023-11-06 22:30:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:30:05,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:30:05,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 720 transitions. [2023-11-06 22:30:05,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332129963898917 [2023-11-06 22:30:05,547 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 720 transitions. [2023-11-06 22:30:05,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 720 transitions. [2023-11-06 22:30:05,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:05,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 720 transitions. [2023-11-06 22:30:05,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:05,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:05,550 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:05,550 INFO L175 Difference]: Start difference. First operand has 184 places, 214 transitions, 2481 flow. Second operand 6 states and 720 transitions. [2023-11-06 22:30:05,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 246 transitions, 3250 flow [2023-11-06 22:30:05,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 246 transitions, 3169 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-11-06 22:30:05,642 INFO L231 Difference]: Finished difference. Result has 190 places, 219 transitions, 2624 flow [2023-11-06 22:30:05,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2624, PETRI_PLACES=190, PETRI_TRANSITIONS=219} [2023-11-06 22:30:05,644 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 154 predicate places. [2023-11-06 22:30:05,644 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 219 transitions, 2624 flow [2023-11-06 22:30:05,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 114.44444444444444) internal successors, (1030), 9 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:05,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:05,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:05,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (30)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:05,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:30:05,857 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:30:05,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:05,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1131171664, now seen corresponding path program 5 times [2023-11-06 22:30:05,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:30:05,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547027235] [2023-11-06 22:30:05,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:30:05,858 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 22:30:05,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:30:05,859 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:30:05,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (31)] Waiting until timeout for monitored process [2023-11-06 22:30:06,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:30:06,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:06,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:30:06,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:06,414 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:06,415 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 18 [2023-11-06 22:30:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:06,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:06,877 INFO L322 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-11-06 22:30:06,878 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 60 [2023-11-06 22:30:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:07,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:30:07,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547027235] [2023-11-06 22:30:07,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547027235] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:07,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:30:07,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 10 [2023-11-06 22:30:07,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351859938] [2023-11-06 22:30:07,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:07,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:30:07,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:30:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:30:07,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:30:09,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 277 [2023-11-06 22:30:09,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 219 transitions, 2624 flow. Second operand has 12 states, 12 states have (on average 111.83333333333333) internal successors, (1342), 12 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:09,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:09,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 277 [2023-11-06 22:30:09,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:11,075 INFO L124 PetriNetUnfolderBase]: 2333/3670 cut-off events. [2023-11-06 22:30:11,075 INFO L125 PetriNetUnfolderBase]: For 23957/23957 co-relation queries the response was YES. [2023-11-06 22:30:11,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19463 conditions, 3670 events. 2333/3670 cut-off events. For 23957/23957 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 17066 event pairs, 705 based on Foata normal form. 3/3623 useless extension candidates. Maximal degree in co-relation 19380. Up to 3379 conditions per place. [2023-11-06 22:30:11,122 INFO L140 encePairwiseOnDemand]: 270/277 looper letters, 181 selfloop transitions, 77 changer transitions 7/265 dead transitions. [2023-11-06 22:30:11,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 265 transitions, 3712 flow [2023-11-06 22:30:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:30:11,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:30:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 809 transitions. [2023-11-06 22:30:11,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41722537390407427 [2023-11-06 22:30:11,125 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 809 transitions. [2023-11-06 22:30:11,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 809 transitions. [2023-11-06 22:30:11,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:11,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 809 transitions. [2023-11-06 22:30:11,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:11,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:11,129 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:11,129 INFO L175 Difference]: Start difference. First operand has 190 places, 219 transitions, 2624 flow. Second operand 7 states and 809 transitions. [2023-11-06 22:30:11,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 265 transitions, 3712 flow [2023-11-06 22:30:11,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 265 transitions, 3622 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-11-06 22:30:11,251 INFO L231 Difference]: Finished difference. Result has 195 places, 238 transitions, 3126 flow [2023-11-06 22:30:11,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3126, PETRI_PLACES=195, PETRI_TRANSITIONS=238} [2023-11-06 22:30:11,251 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 159 predicate places. [2023-11-06 22:30:11,252 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 238 transitions, 3126 flow [2023-11-06 22:30:11,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 111.83333333333333) internal successors, (1342), 12 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:11,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:11,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:11,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (31)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:11,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:30:11,453 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:30:11,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:11,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1029408998, now seen corresponding path program 6 times [2023-11-06 22:30:11,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:30:11,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890209275] [2023-11-06 22:30:11,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:30:11,454 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 22:30:11,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:30:11,455 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:30:11,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (32)] Waiting until timeout for monitored process [2023-11-06 22:30:11,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:30:11,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:11,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:30:11,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:11,938 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:30:11,939 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 18 [2023-11-06 22:30:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:11,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:30:12,359 INFO L322 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-11-06 22:30:12,360 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 89 treesize of output 68 [2023-11-06 22:30:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:30:13,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:30:13,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890209275] [2023-11-06 22:30:13,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890209275] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:30:13,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:30:13,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-06 22:30:13,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729881098] [2023-11-06 22:30:13,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:30:13,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:30:13,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:30:13,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:30:13,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:30:15,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 277 [2023-11-06 22:30:15,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 238 transitions, 3126 flow. Second operand has 9 states, 9 states have (on average 114.44444444444444) internal successors, (1030), 9 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:15,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:30:15,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 277 [2023-11-06 22:30:15,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:30:17,194 INFO L124 PetriNetUnfolderBase]: 2317/3630 cut-off events. [2023-11-06 22:30:17,194 INFO L125 PetriNetUnfolderBase]: For 25647/25647 co-relation queries the response was YES. [2023-11-06 22:30:17,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19577 conditions, 3630 events. 2317/3630 cut-off events. For 25647/25647 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 16826 event pairs, 739 based on Foata normal form. 3/3583 useless extension candidates. Maximal degree in co-relation 19491. Up to 3413 conditions per place. [2023-11-06 22:30:17,234 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 216 selfloop transitions, 40 changer transitions 9/265 dead transitions. [2023-11-06 22:30:17,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 265 transitions, 3966 flow [2023-11-06 22:30:17,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:30:17,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:30:17,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 716 transitions. [2023-11-06 22:30:17,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43080625752105894 [2023-11-06 22:30:17,238 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 716 transitions. [2023-11-06 22:30:17,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 716 transitions. [2023-11-06 22:30:17,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:30:17,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 716 transitions. [2023-11-06 22:30:17,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:17,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:17,240 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:17,241 INFO L175 Difference]: Start difference. First operand has 195 places, 238 transitions, 3126 flow. Second operand 6 states and 716 transitions. [2023-11-06 22:30:17,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 265 transitions, 3966 flow [2023-11-06 22:30:17,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 265 transitions, 3756 flow, removed 82 selfloop flow, removed 2 redundant places. [2023-11-06 22:30:17,365 INFO L231 Difference]: Finished difference. Result has 200 places, 240 transitions, 3145 flow [2023-11-06 22:30:17,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=2946, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3145, PETRI_PLACES=200, PETRI_TRANSITIONS=240} [2023-11-06 22:30:17,366 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 164 predicate places. [2023-11-06 22:30:17,366 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 240 transitions, 3145 flow [2023-11-06 22:30:17,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 114.44444444444444) internal successors, (1030), 9 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:17,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:30:17,367 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 1, 1, 1, 1, 1] [2023-11-06 22:30:17,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (32)] Forceful destruction successful, exit code 0 [2023-11-06 22:30:17,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:30:17,569 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:30:17,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:17,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1894426495, now seen corresponding path program 5 times [2023-11-06 22:30:17,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:30:17,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336983794] [2023-11-06 22:30:17,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:30:17,570 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 22:30:17,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:30:17,571 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 22:30:17,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38403697-bf74-456d-82c8-be51814538cd/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 (33)] Waiting until timeout for monitored process [2023-11-06 22:30:18,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-06 22:30:18,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:30:18,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:30:18,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:30:18,060 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 22:30:18,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:30:18,085 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 22:30:18,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:30:18,104 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 22:30:18,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:30:18,115 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 22:30:18,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:30:18,151 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 22:30:18,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:30:18,170 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 22:30:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:30:19,857 INFO L327 TraceCheckSpWp]: Computing backward predicates...