./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:46:31,189 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:46:31,306 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 10:46:31,316 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:46:31,318 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:46:31,354 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:46:31,356 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:46:31,357 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:46:31,358 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:46:31,362 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:46:31,363 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:46:31,364 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:46:31,376 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:46:31,376 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:46:31,377 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:46:31,378 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:46:31,379 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:46:31,379 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:46:31,380 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:46:31,380 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:46:31,381 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:46:31,382 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:46:31,382 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:46:31,383 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:46:31,383 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:46:31,384 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:46:31,384 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:46:31,385 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:46:31,386 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:46:31,386 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:46:31,387 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:46:31,388 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:46:31,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:31,389 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:46:31,389 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:46:31,389 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:46:31,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:46:31,390 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:46:31,390 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:46:31,391 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:46:31,391 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:46:31,392 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_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 [2023-11-26 10:46:31,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:46:31,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:46:31,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:46:31,762 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:46:31,763 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:46:31,764 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2023-11-26 10:46:34,841 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:46:35,040 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:46:35,041 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2023-11-26 10:46:35,055 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/data/3623648e5/4f7c64e24c024581b2d00001769a1009/FLAGc17c9a694 [2023-11-26 10:46:35,071 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/data/3623648e5/4f7c64e24c024581b2d00001769a1009 [2023-11-26 10:46:35,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:46:35,074 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:46:35,076 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:35,076 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:46:35,082 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:46:35,083 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:35" (1/1) ... [2023-11-26 10:46:35,084 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@573994b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:35, skipping insertion in model container [2023-11-26 10:46:35,084 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:35" (1/1) ... [2023-11-26 10:46:35,111 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:46:35,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:35,348 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-26 10:46:35,352 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@63c03bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:35, skipping insertion in model container [2023-11-26 10:46:35,352 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:35,353 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-26 10:46:35,354 INFO L158 Benchmark]: Toolchain (without parser) took 279.24ms. Allocated memory is still 146.8MB. Free memory was 102.3MB in the beginning and 91.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-26 10:46:35,355 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 146.8MB. Free memory is still 115.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 10:46:35,356 INFO L158 Benchmark]: CACSL2BoogieTranslator took 276.70ms. Allocated memory is still 146.8MB. Free memory was 102.3MB in the beginning and 91.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-26 10:46:35,358 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 146.8MB. Free memory is still 115.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 276.70ms. Allocated memory is still 146.8MB. Free memory was 102.3MB in the beginning and 91.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: 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_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:46:37,912 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:46:38,043 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-26 10:46:38,052 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:46:38,053 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:46:38,112 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:46:38,113 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:46:38,114 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:46:38,115 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:46:38,120 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:46:38,121 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:46:38,122 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:46:38,122 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:46:38,124 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:46:38,125 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:46:38,126 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:46:38,126 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:46:38,127 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:46:38,127 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:46:38,129 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:46:38,129 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:46:38,130 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:46:38,130 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:46:38,131 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:46:38,131 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:46:38,132 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-26 10:46:38,132 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-26 10:46:38,133 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:46:38,133 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:46:38,134 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:46:38,136 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:46:38,136 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:46:38,137 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:46:38,137 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:46:38,137 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:38,138 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:46:38,139 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:46:38,139 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-26 10:46:38,140 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-26 10:46:38,140 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:46:38,140 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:46:38,141 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:46:38,141 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:46:38,141 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-26 10:46:38,142 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_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 [2023-11-26 10:46:38,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:46:38,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:46:38,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:46:38,596 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:46:38,597 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:46:38,599 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2023-11-26 10:46:41,737 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:46:42,034 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:46:42,034 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2023-11-26 10:46:42,042 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/data/c67fa8eca/41117ac74d3649cdab576f5b369d7521/FLAG6c4295f59 [2023-11-26 10:46:42,060 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/data/c67fa8eca/41117ac74d3649cdab576f5b369d7521 [2023-11-26 10:46:42,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:46:42,064 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:46:42,066 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:42,066 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:46:42,072 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:46:42,072 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:42" (1/1) ... [2023-11-26 10:46:42,074 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74d87e5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:42, skipping insertion in model container [2023-11-26 10:46:42,074 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:42" (1/1) ... [2023-11-26 10:46:42,105 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:46:42,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:42,397 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-26 10:46:42,412 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:46:42,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:42,467 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:46:42,519 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:42,546 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:46:42,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:42 WrapperNode [2023-11-26 10:46:42,547 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:42,548 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:46:42,549 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:46:42,549 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:46:42,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:42" (1/1) ... [2023-11-26 10:46:42,587 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:42" (1/1) ... [2023-11-26 10:46:42,626 INFO L138 Inliner]: procedures = 26, calls = 38, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 107 [2023-11-26 10:46:42,627 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:46:42,629 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:46:42,629 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:46:42,629 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:46:42,642 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:42" (1/1) ... [2023-11-26 10:46:42,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:42" (1/1) ... [2023-11-26 10:46:42,662 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:42" (1/1) ... [2023-11-26 10:46:42,696 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 2, 2, 7, 2]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-26 10:46:42,699 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:42" (1/1) ... [2023-11-26 10:46:42,716 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:42" (1/1) ... [2023-11-26 10:46:42,733 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:42" (1/1) ... [2023-11-26 10:46:42,756 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:42" (1/1) ... [2023-11-26 10:46:42,759 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:42" (1/1) ... [2023-11-26 10:46:42,761 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:42" (1/1) ... [2023-11-26 10:46:42,772 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:46:42,773 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:46:42,773 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:46:42,778 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:46:42,779 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:42" (1/1) ... [2023-11-26 10:46:42,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:42,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:42,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:46:42,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:46:42,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:46:42,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-26 10:46:42,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-26 10:46:42,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-26 10:46:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-26 10:46:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-26 10:46:42,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:46:42,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-26 10:46:42,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-26 10:46:42,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-26 10:46:42,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-26 10:46:42,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-26 10:46:42,870 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 10:46:42,871 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 10:46:42,871 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 10:46:42,871 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 10:46:42,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 10:46:42,873 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 10:46:42,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:46:42,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:46:42,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:46:42,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:46:42,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-26 10:46:42,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-26 10:46:42,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-26 10:46:42,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-26 10:46:42,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-26 10:46:42,878 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:46:43,074 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:46:43,077 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:46:43,660 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:46:43,945 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:46:43,945 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 10:46:43,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:43 BoogieIcfgContainer [2023-11-26 10:46:43,946 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:46:43,948 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:46:43,948 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:46:43,952 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:46:43,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:46:42" (1/3) ... [2023-11-26 10:46:43,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32298ccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:43, skipping insertion in model container [2023-11-26 10:46:43,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:42" (2/3) ... [2023-11-26 10:46:43,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32298ccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:43, skipping insertion in model container [2023-11-26 10:46:43,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:43" (3/3) ... [2023-11-26 10:46:43,955 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2023-11-26 10:46:43,975 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:46:43,976 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-11-26 10:46:43,976 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:46:44,087 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 10:46:44,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 79 transitions, 179 flow [2023-11-26 10:46:44,179 INFO L124 PetriNetUnfolderBase]: 7/76 cut-off events. [2023-11-26 10:46:44,180 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 10:46:44,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 76 events. 7/76 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 190 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-11-26 10:46:44,189 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 79 transitions, 179 flow [2023-11-26 10:46:44,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 75 transitions, 168 flow [2023-11-26 10:46:44,212 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:46:44,219 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;@7e0d2b0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:46:44,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-11-26 10:46:44,224 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:46:44,225 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-26 10:46:44,225 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:46:44,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:44,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:46:44,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-26 10:46:44,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:44,236 INFO L85 PathProgramCache]: Analyzing trace with hash 493219, now seen corresponding path program 1 times [2023-11-26 10:46:44,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:46:44,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347864573] [2023-11-26 10:46:44,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:44,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:46:44,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:46:44,260 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:46:44,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-26 10:46:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:44,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:46:44,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:44,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:46:44,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 10:46:44,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:46:44,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-26 10:46:44,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:46:44,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 10:46:44,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:46:44,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 10:46:44,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:46:44,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 10:46:44,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:46:44,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-26 10:46:44,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:46:44,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 10:46:44,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:46:44,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-26 10:46:44,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:46:44,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 10:46:44,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:46:44,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-26 10:46:44,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-26 10:46:44,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:46:44,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-26 10:46:44,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:44,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-26 10:46:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:44,994 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:44,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:46:44,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347864573] [2023-11-26 10:46:44,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347864573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:44,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:44,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:46:44,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241191762] [2023-11-26 10:46:45,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:45,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:45,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:46:45,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:45,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:45,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-26 10:46:45,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:45,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:45,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-26 10:46:45,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:45,608 INFO L124 PetriNetUnfolderBase]: 777/1691 cut-off events. [2023-11-26 10:46:45,608 INFO L125 PetriNetUnfolderBase]: For 103/106 co-relation queries the response was YES. [2023-11-26 10:46:45,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2820 conditions, 1691 events. 777/1691 cut-off events. For 103/106 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11329 event pairs, 457 based on Foata normal form. 1/1129 useless extension candidates. Maximal degree in co-relation 2699. Up to 1047 conditions per place. [2023-11-26 10:46:45,657 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 27 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-11-26 10:46:45,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 72 transitions, 220 flow [2023-11-26 10:46:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:46:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2023-11-26 10:46:45,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7257383966244726 [2023-11-26 10:46:45,678 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 172 transitions. [2023-11-26 10:46:45,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 172 transitions. [2023-11-26 10:46:45,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:45,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 172 transitions. [2023-11-26 10:46:45,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:45,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:45,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:45,703 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 168 flow. Second operand 3 states and 172 transitions. [2023-11-26 10:46:45,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 72 transitions, 220 flow [2023-11-26 10:46:45,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 72 transitions, 208 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 10:46:45,721 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 154 flow [2023-11-26 10:46:45,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2023-11-26 10:46:45,727 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -7 predicate places. [2023-11-26 10:46:45,727 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 154 flow [2023-11-26 10:46:45,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:45,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:45,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:46:45,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:45,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:46:45,931 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-26 10:46:45,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:45,932 INFO L85 PathProgramCache]: Analyzing trace with hash 493220, now seen corresponding path program 1 times [2023-11-26 10:46:45,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:46:45,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007722794] [2023-11-26 10:46:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:45,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:46:45,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:46:45,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:46:45,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-26 10:46:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:46,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:46:46,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:46,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-26 10:46:46,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:46,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:46,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:46:46,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:46,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:46:46,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:46:46,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:46,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:46:46,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:46,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:46,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:46:46,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:46,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:46:46,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:46:46,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:46,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:46:46,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:46,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:46:46,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:46,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:46:46,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:46,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-26 10:46:46,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:46,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:46:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:46,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:46,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:46:46,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007722794] [2023-11-26 10:46:46,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007722794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:46,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:46,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:46:46,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524663441] [2023-11-26 10:46:46,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:46,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:46:46,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:46:46,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:46:46,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:46:46,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-26 10:46:46,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:46,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:46,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-26 10:46:46,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:47,442 INFO L124 PetriNetUnfolderBase]: 778/1694 cut-off events. [2023-11-26 10:46:47,442 INFO L125 PetriNetUnfolderBase]: For 25/28 co-relation queries the response was YES. [2023-11-26 10:46:47,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2778 conditions, 1694 events. 778/1694 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11323 event pairs, 457 based on Foata normal form. 0/1131 useless extension candidates. Maximal degree in co-relation 2756. Up to 1052 conditions per place. [2023-11-26 10:46:47,459 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 29 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-11-26 10:46:47,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 75 transitions, 228 flow [2023-11-26 10:46:47,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:46:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:46:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 222 transitions. [2023-11-26 10:46:47,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7025316455696202 [2023-11-26 10:46:47,473 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 222 transitions. [2023-11-26 10:46:47,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 222 transitions. [2023-11-26 10:46:47,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:47,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 222 transitions. [2023-11-26 10:46:47,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,480 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,480 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 154 flow. Second operand 4 states and 222 transitions. [2023-11-26 10:46:47,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 75 transitions, 228 flow [2023-11-26 10:46:47,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 75 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:46:47,485 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 177 flow [2023-11-26 10:46:47,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2023-11-26 10:46:47,486 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -4 predicate places. [2023-11-26 10:46:47,486 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 177 flow [2023-11-26 10:46:47,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:47,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:46:47,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:47,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:46:47,694 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-26 10:46:47,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:47,695 INFO L85 PathProgramCache]: Analyzing trace with hash 493240, now seen corresponding path program 1 times [2023-11-26 10:46:47,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:46:47,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312305400] [2023-11-26 10:46:47,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:47,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:46:47,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:46:47,697 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:46:47,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-26 10:46:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:47,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:46:47,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:47,825 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:47,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:46:47,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312305400] [2023-11-26 10:46:47,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312305400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:47,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:47,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:46:47,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908056124] [2023-11-26 10:46:47,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:47,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:47,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:46:47,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:47,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:47,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2023-11-26 10:46:47,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:47,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:47,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2023-11-26 10:46:47,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:48,222 INFO L124 PetriNetUnfolderBase]: 777/1693 cut-off events. [2023-11-26 10:46:48,222 INFO L125 PetriNetUnfolderBase]: For 25/28 co-relation queries the response was YES. [2023-11-26 10:46:48,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2783 conditions, 1693 events. 777/1693 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11332 event pairs, 457 based on Foata normal form. 1/1131 useless extension candidates. Maximal degree in co-relation 2767. Up to 1050 conditions per place. [2023-11-26 10:46:48,241 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 29 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-11-26 10:46:48,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 74 transitions, 234 flow [2023-11-26 10:46:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:48,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:46:48,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2023-11-26 10:46:48,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7426160337552743 [2023-11-26 10:46:48,243 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 176 transitions. [2023-11-26 10:46:48,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 176 transitions. [2023-11-26 10:46:48,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:48,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 176 transitions. [2023-11-26 10:46:48,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:48,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:48,245 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:48,245 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 177 flow. Second operand 3 states and 176 transitions. [2023-11-26 10:46:48,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 74 transitions, 234 flow [2023-11-26 10:46:48,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:46:48,249 INFO L231 Difference]: Finished difference. Result has 75 places, 74 transitions, 174 flow [2023-11-26 10:46:48,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=75, PETRI_TRANSITIONS=74} [2023-11-26 10:46:48,250 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2023-11-26 10:46:48,250 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 74 transitions, 174 flow [2023-11-26 10:46:48,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:48,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:48,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-26 10:46:48,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-26 10:46:48,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:46:48,453 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-26 10:46:48,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:48,454 INFO L85 PathProgramCache]: Analyzing trace with hash 474000023, now seen corresponding path program 1 times [2023-11-26 10:46:48,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:46:48,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475669474] [2023-11-26 10:46:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:48,454 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 [2023-11-26 10:46:48,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:46:48,456 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:46:48,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-26 10:46:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:48,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:46:48,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:48,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-26 10:46:48,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:48,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:48,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:46:48,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:46:48,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:48,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:48,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:46:48,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:46:48,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:48,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:46:48,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:48,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:46:48,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-26 10:46:48,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:46:48,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:48,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:46:48,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:48,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:46:48,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:48,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:46:48,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:48,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:49,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:49,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:46:49,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:49,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:46:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:49,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:49,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:46:49,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475669474] [2023-11-26 10:46:49,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475669474] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:49,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:46:49,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-26 10:46:49,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552256678] [2023-11-26 10:46:49,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:49,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:46:49,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:46:49,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:46:49,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:46:52,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-26 10:46:52,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 74 transitions, 174 flow. Second operand has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:52,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:52,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-26 10:46:52,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:53,281 INFO L124 PetriNetUnfolderBase]: 780/1702 cut-off events. [2023-11-26 10:46:53,281 INFO L125 PetriNetUnfolderBase]: For 25/28 co-relation queries the response was YES. [2023-11-26 10:46:53,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2812 conditions, 1702 events. 780/1702 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11368 event pairs, 457 based on Foata normal form. 0/1135 useless extension candidates. Maximal degree in co-relation 2795. Up to 1054 conditions per place. [2023-11-26 10:46:53,301 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 29 selfloop transitions, 12 changer transitions 0/83 dead transitions. [2023-11-26 10:46:53,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 292 flow [2023-11-26 10:46:53,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:46:53,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 10:46:53,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 514 transitions. [2023-11-26 10:46:53,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6506329113924051 [2023-11-26 10:46:53,305 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 514 transitions. [2023-11-26 10:46:53,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 514 transitions. [2023-11-26 10:46:53,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:53,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 514 transitions. [2023-11-26 10:46:53,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 51.4) internal successors, (514), 10 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:53,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 79.0) internal successors, (869), 11 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:53,311 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 79.0) internal successors, (869), 11 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:53,311 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 174 flow. Second operand 10 states and 514 transitions. [2023-11-26 10:46:53,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 292 flow [2023-11-26 10:46:53,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:46:53,315 INFO L231 Difference]: Finished difference. Result has 85 places, 83 transitions, 248 flow [2023-11-26 10:46:53,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=248, PETRI_PLACES=85, PETRI_TRANSITIONS=83} [2023-11-26 10:46:53,316 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2023-11-26 10:46:53,317 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 83 transitions, 248 flow [2023-11-26 10:46:53,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:53,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:53,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:46:53,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:53,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:46:53,530 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-26 10:46:53,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:53,531 INFO L85 PathProgramCache]: Analyzing trace with hash 474000043, now seen corresponding path program 1 times [2023-11-26 10:46:53,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:46:53,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74921354] [2023-11-26 10:46:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:53,532 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 [2023-11-26 10:46:53,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:46:53,533 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:46:53,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-26 10:46:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:53,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:46:53,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:53,684 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 10:46:53,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-26 10:46:53,720 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-26 10:46:53,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-26 10:46:53,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:53,764 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-26 10:46:53,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2023-11-26 10:46:53,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:53,813 INFO L349 Elim1Store]: treesize reduction 60, result has 10.4 percent of original size [2023-11-26 10:46:53,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2023-11-26 10:46:53,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:53,856 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-26 10:46:53,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2023-11-26 10:46:53,884 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 10:46:53,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-26 10:46:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:54,134 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:54,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:46:54,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74921354] [2023-11-26 10:46:54,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74921354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:54,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:54,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:46:54,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536425061] [2023-11-26 10:46:54,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:54,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:54,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:46:54,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:54,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:54,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2023-11-26 10:46:54,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 83 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:54,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:54,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2023-11-26 10:46:54,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:46:54,739 INFO L124 PetriNetUnfolderBase]: 1151/2337 cut-off events. [2023-11-26 10:46:54,739 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-26 10:46:54,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3945 conditions, 2337 events. 1151/2337 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 15698 event pairs, 697 based on Foata normal form. 0/1643 useless extension candidates. Maximal degree in co-relation 3911. Up to 1537 conditions per place. [2023-11-26 10:46:54,766 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 41 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2023-11-26 10:46:54,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 328 flow [2023-11-26 10:46:54,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:54,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:46:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-11-26 10:46:54,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6962025316455697 [2023-11-26 10:46:54,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-11-26 10:46:54,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-11-26 10:46:54,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:46:54,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-11-26 10:46:54,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:54,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:54,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:54,792 INFO L175 Difference]: Start difference. First operand has 85 places, 83 transitions, 248 flow. Second operand 3 states and 165 transitions. [2023-11-26 10:46:54,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 328 flow [2023-11-26 10:46:54,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 300 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-26 10:46:54,796 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 218 flow [2023-11-26 10:46:54,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2023-11-26 10:46:54,798 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2023-11-26 10:46:54,798 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 218 flow [2023-11-26 10:46:54,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:54,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:46:54,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:46:54,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:55,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:46:55,009 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-26 10:46:55,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:55,010 INFO L85 PathProgramCache]: Analyzing trace with hash 474000044, now seen corresponding path program 1 times [2023-11-26 10:46:55,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:46:55,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121330682] [2023-11-26 10:46:55,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:55,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:46:55,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:46:55,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:46:55,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-26 10:46:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:55,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:46:55,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:55,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:55,196 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-11-26 10:46:55,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2023-11-26 10:46:55,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-26 10:46:55,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:55,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:55,317 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-26 10:46:55,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2023-11-26 10:46:55,348 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-26 10:46:55,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2023-11-26 10:46:55,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:55,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:55,461 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-11-26 10:46:55,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2023-11-26 10:46:55,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:55,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-26 10:46:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:56,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:57,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:46:57,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121330682] [2023-11-26 10:46:57,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121330682] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:57,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:46:57,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-26 10:46:57,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3586787] [2023-11-26 10:46:57,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:57,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:46:57,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:46:57,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:46:57,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:46:59,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2023-11-26 10:46:59,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 218 flow. Second operand has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:59,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:46:59,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2023-11-26 10:46:59,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:02,538 INFO L124 PetriNetUnfolderBase]: 1151/2316 cut-off events. [2023-11-26 10:47:02,538 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-26 10:47:02,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3911 conditions, 2316 events. 1151/2316 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 15424 event pairs, 697 based on Foata normal form. 0/1622 useless extension candidates. Maximal degree in co-relation 3899. Up to 1533 conditions per place. [2023-11-26 10:47:02,565 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 37 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2023-11-26 10:47:02,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 79 transitions, 298 flow [2023-11-26 10:47:02,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:47:02,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:47:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 302 transitions. [2023-11-26 10:47:02,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371308016877637 [2023-11-26 10:47:02,568 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 302 transitions. [2023-11-26 10:47:02,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 302 transitions. [2023-11-26 10:47:02,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:02,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 302 transitions. [2023-11-26 10:47:02,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 50.333333333333336) internal successors, (302), 6 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:02,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:02,572 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:02,572 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 218 flow. Second operand 6 states and 302 transitions. [2023-11-26 10:47:02,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 79 transitions, 298 flow [2023-11-26 10:47:02,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 79 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:47:02,578 INFO L231 Difference]: Finished difference. Result has 84 places, 79 transitions, 223 flow [2023-11-26 10:47:02,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=84, PETRI_TRANSITIONS=79} [2023-11-26 10:47:02,582 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 6 predicate places. [2023-11-26 10:47:02,583 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 79 transitions, 223 flow [2023-11-26 10:47:02,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:02,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:02,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:02,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:02,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:02,786 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-26 10:47:02,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:02,786 INFO L85 PathProgramCache]: Analyzing trace with hash -916682411, now seen corresponding path program 1 times [2023-11-26 10:47:02,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:47:02,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970601714] [2023-11-26 10:47:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:02,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:02,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:47:02,789 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:47:02,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-26 10:47:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:02,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:47:02,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:02,939 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 10:47:02,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-26 10:47:02,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:02,993 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-26 10:47:02,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-26 10:47:03,023 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 10:47:03,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-26 10:47:03,053 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-26 10:47:03,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2023-11-26 10:47:03,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:03,099 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-26 10:47:03,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-26 10:47:03,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:03,134 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 10:47:03,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-26 10:47:03,168 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-26 10:47:03,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-26 10:47:03,189 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 10:47:03,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-26 10:47:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:47:03,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:03,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:47:03,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970601714] [2023-11-26 10:47:03,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970601714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:03,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:03,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:47:03,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920002988] [2023-11-26 10:47:03,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:03,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:03,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:47:03,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:03,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:03,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2023-11-26 10:47:03,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 79 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:03,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:03,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2023-11-26 10:47:03,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:04,087 INFO L124 PetriNetUnfolderBase]: 838/1763 cut-off events. [2023-11-26 10:47:04,087 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-26 10:47:04,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2971 conditions, 1763 events. 838/1763 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11431 event pairs, 494 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 2958. Up to 1145 conditions per place. [2023-11-26 10:47:04,102 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 41 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-11-26 10:47:04,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 303 flow [2023-11-26 10:47:04,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:04,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:47:04,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-11-26 10:47:04,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6962025316455697 [2023-11-26 10:47:04,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-11-26 10:47:04,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-11-26 10:47:04,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:04,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-11-26 10:47:04,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:04,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:04,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:04,107 INFO L175 Difference]: Start difference. First operand has 84 places, 79 transitions, 223 flow. Second operand 3 states and 165 transitions. [2023-11-26 10:47:04,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 303 flow [2023-11-26 10:47:04,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 295 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 10:47:04,110 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 213 flow [2023-11-26 10:47:04,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2023-11-26 10:47:04,111 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2023-11-26 10:47:04,111 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 213 flow [2023-11-26 10:47:04,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:04,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:04,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:04,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:04,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:04,315 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-26 10:47:04,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:04,315 INFO L85 PathProgramCache]: Analyzing trace with hash -916682410, now seen corresponding path program 1 times [2023-11-26 10:47:04,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:47:04,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393781584] [2023-11-26 10:47:04,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:04,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:04,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:47:04,317 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:47:04,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-26 10:47:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:04,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 10:47:04,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:04,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-26 10:47:04,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,519 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-26 10:47:04,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-26 10:47:04,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-26 10:47:04,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,586 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-26 10:47:04,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-26 10:47:04,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-26 10:47:04,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-26 10:47:04,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 10:47:04,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-26 10:47:04,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 10:47:04,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,747 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-26 10:47:04,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2023-11-26 10:47:04,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-26 10:47:04,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,818 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-26 10:47:04,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-26 10:47:04,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:04,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-26 10:47:04,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:05,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:05,969 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:47:05,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393781584] [2023-11-26 10:47:05,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393781584] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:05,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:47:05,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-26 10:47:05,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851503735] [2023-11-26 10:47:05,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:05,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:47:05,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:47:05,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:47:05,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:47:07,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2023-11-26 10:47:07,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 213 flow. Second operand has 10 states, 10 states have (on average 45.4) internal successors, (454), 10 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:07,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:07,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2023-11-26 10:47:07,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:09,119 INFO L124 PetriNetUnfolderBase]: 838/1754 cut-off events. [2023-11-26 10:47:09,120 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-26 10:47:09,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2960 conditions, 1754 events. 838/1754 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11318 event pairs, 494 based on Foata normal form. 0/1218 useless extension candidates. Maximal degree in co-relation 2947. Up to 1141 conditions per place. [2023-11-26 10:47:09,135 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 37 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-11-26 10:47:09,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 293 flow [2023-11-26 10:47:09,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:47:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:47:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 302 transitions. [2023-11-26 10:47:09,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371308016877637 [2023-11-26 10:47:09,139 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 302 transitions. [2023-11-26 10:47:09,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 302 transitions. [2023-11-26 10:47:09,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:09,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 302 transitions. [2023-11-26 10:47:09,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 50.333333333333336) internal successors, (302), 6 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:09,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:09,142 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:09,142 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 213 flow. Second operand 6 states and 302 transitions. [2023-11-26 10:47:09,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 293 flow [2023-11-26 10:47:09,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:47:09,146 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 218 flow [2023-11-26 10:47:09,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=218, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2023-11-26 10:47:09,150 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2023-11-26 10:47:09,150 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 218 flow [2023-11-26 10:47:09,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 45.4) internal successors, (454), 10 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:09,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:09,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:09,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-26 10:47:09,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:09,354 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-26 10:47:09,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:09,355 INFO L85 PathProgramCache]: Analyzing trace with hash -463147816, now seen corresponding path program 1 times [2023-11-26 10:47:09,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:47:09,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501428089] [2023-11-26 10:47:09,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:09,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:09,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:47:09,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:47:09,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-26 10:47:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:09,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:47:09,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:09,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:09,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-26 10:47:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:09,982 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:47:09,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501428089] [2023-11-26 10:47:09,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501428089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:09,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:47:09,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-26 10:47:09,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006363370] [2023-11-26 10:47:09,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:09,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:47:09,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:47:09,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:47:09,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:47:12,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2023-11-26 10:47:12,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 218 flow. Second operand has 10 states, 10 states have (on average 47.6) internal successors, (476), 10 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:12,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:12,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2023-11-26 10:47:12,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:13,524 INFO L124 PetriNetUnfolderBase]: 1770/3336 cut-off events. [2023-11-26 10:47:13,524 INFO L125 PetriNetUnfolderBase]: For 31/34 co-relation queries the response was YES. [2023-11-26 10:47:13,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5804 conditions, 3336 events. 1770/3336 cut-off events. For 31/34 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22549 event pairs, 508 based on Foata normal form. 0/2449 useless extension candidates. Maximal degree in co-relation 5790. Up to 1164 conditions per place. [2023-11-26 10:47:13,545 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 66 selfloop transitions, 12 changer transitions 0/111 dead transitions. [2023-11-26 10:47:13,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 111 transitions, 450 flow [2023-11-26 10:47:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:47:13,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 10:47:13,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 441 transitions. [2023-11-26 10:47:13,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6977848101265823 [2023-11-26 10:47:13,549 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 441 transitions. [2023-11-26 10:47:13,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 441 transitions. [2023-11-26 10:47:13,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:13,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 441 transitions. [2023-11-26 10:47:13,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 55.125) internal successors, (441), 8 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:13,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:13,554 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:13,554 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 218 flow. Second operand 8 states and 441 transitions. [2023-11-26 10:47:13,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 111 transitions, 450 flow [2023-11-26 10:47:13,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 111 transitions, 442 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 10:47:13,558 INFO L231 Difference]: Finished difference. Result has 87 places, 79 transitions, 262 flow [2023-11-26 10:47:13,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=262, PETRI_PLACES=87, PETRI_TRANSITIONS=79} [2023-11-26 10:47:13,559 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 9 predicate places. [2023-11-26 10:47:13,559 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 79 transitions, 262 flow [2023-11-26 10:47:13,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 47.6) internal successors, (476), 10 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:13,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:13,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:13,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:13,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:13,763 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-26 10:47:13,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:13,763 INFO L85 PathProgramCache]: Analyzing trace with hash -463147817, now seen corresponding path program 1 times [2023-11-26 10:47:13,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:47:13,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005299049] [2023-11-26 10:47:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:13,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:13,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:47:13,765 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:47:13,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-26 10:47:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:13,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:47:13,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:13,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-26 10:47:13,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:13,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:47:13,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:13,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:47:13,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:13,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 10:47:13,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:13,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-26 10:47:13,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:13,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:47:13,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:13,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 10:47:13,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:13,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:47:13,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:13,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 10:47:13,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:13,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:47:13,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:13,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:47:13,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:13,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-26 10:47:13,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:13,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-26 10:47:13,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:13,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:47:14,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:14,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-26 10:47:14,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:14,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-26 10:47:14,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:14,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:47:14,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:14,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-26 10:47:14,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:14,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:47:14,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:14,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-26 10:47:14,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:14,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:47:14,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:14,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 10:47:14,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:14,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 10:47:14,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:14,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 10:47:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:47:14,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:14,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:47:14,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005299049] [2023-11-26 10:47:14,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005299049] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:14,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:14,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:47:14,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595886980] [2023-11-26 10:47:14,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:14,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:47:14,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:47:14,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:47:14,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:47:14,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 79 [2023-11-26 10:47:14,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 79 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:14,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:14,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 79 [2023-11-26 10:47:14,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:14,998 INFO L124 PetriNetUnfolderBase]: 2235/3737 cut-off events. [2023-11-26 10:47:14,998 INFO L125 PetriNetUnfolderBase]: For 1326/1329 co-relation queries the response was YES. [2023-11-26 10:47:15,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7842 conditions, 3737 events. 2235/3737 cut-off events. For 1326/1329 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21903 event pairs, 1437 based on Foata normal form. 142/3398 useless extension candidates. Maximal degree in co-relation 7826. Up to 2985 conditions per place. [2023-11-26 10:47:15,034 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 42 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-11-26 10:47:15,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 344 flow [2023-11-26 10:47:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:47:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:47:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2023-11-26 10:47:15,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6012658227848101 [2023-11-26 10:47:15,036 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 190 transitions. [2023-11-26 10:47:15,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 190 transitions. [2023-11-26 10:47:15,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:15,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 190 transitions. [2023-11-26 10:47:15,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:15,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:15,044 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:15,044 INFO L175 Difference]: Start difference. First operand has 87 places, 79 transitions, 262 flow. Second operand 4 states and 190 transitions. [2023-11-26 10:47:15,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 344 flow [2023-11-26 10:47:15,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 73 transitions, 338 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 10:47:15,048 INFO L231 Difference]: Finished difference. Result has 81 places, 73 transitions, 254 flow [2023-11-26 10:47:15,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=81, PETRI_TRANSITIONS=73} [2023-11-26 10:47:15,050 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2023-11-26 10:47:15,050 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 73 transitions, 254 flow [2023-11-26 10:47:15,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:15,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:15,051 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-26 10:47:15,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:15,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:15,252 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-26 10:47:15,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:15,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1596830192, now seen corresponding path program 2 times [2023-11-26 10:47:15,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 10:47:15,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516214955] [2023-11-26 10:47:15,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:47:15,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 10:47:15,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 10:47:15,255 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-26 10:47:15,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c109145d-ea24-4eb6-bae2-5b2cfa504769/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-26 10:47:15,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:47:15,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:15,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 10:47:15,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:15,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-26 10:47:15,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:47:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:47:15,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:47:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:47:15,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:47:15,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:47:15,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:47:15,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:47:15,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:47:15,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:47:15,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:47:15,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-26 10:47:15,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:47:15,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:47:15,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:47:15,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:47:15,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:47:15,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:47:15,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-26 10:47:15,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:47:15,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:47:15,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-26 10:47:15,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:15,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:47:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:16,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:16,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 10:47:16,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516214955] [2023-11-26 10:47:16,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516214955] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:16,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:47:16,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-26 10:47:16,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589096074] [2023-11-26 10:47:16,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:16,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:47:16,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 10:47:16,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:47:16,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:47:22,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-26 10:47:22,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 73 transitions, 254 flow. Second operand has 14 states, 14 states have (on average 48.57142857142857) internal successors, (680), 14 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:22,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:22,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-26 10:47:22,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand