./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-4.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_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:43:43,413 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:43:43,530 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:43:43,536 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:43:43,537 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:43:43,575 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:43:43,576 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:43:43,577 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:43:43,578 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:43:43,583 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:43:43,583 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:43:43,585 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:43:43,585 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:43:43,587 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:43:43,588 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:43:43,588 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:43:43,589 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:43:43,589 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:43:43,590 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:43:43,590 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:43:43,590 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:43:43,591 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:43:43,591 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:43:43,592 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:43:43,592 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:43:43,593 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:43:43,593 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:43:43,594 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:43:43,594 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:43:43,595 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:43:43,596 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:43:43,597 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:43:43,597 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:43:43,597 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:43:43,597 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:43:43,598 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:43:43,598 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:43:43,598 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:43:43,599 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:43:43,599 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:43:43,599 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:43:43,599 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_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 [2023-11-26 11:43:43,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:43:43,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:43:43,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:43:43,977 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:43:43,977 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:43:43,979 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2023-11-26 11:43:47,034 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:43:47,341 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:43:47,342 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2023-11-26 11:43:47,353 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/data/535ab4de6/2e46b0965f9843e3b2de715d2e66b06c/FLAG6ca905985 [2023-11-26 11:43:47,374 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/data/535ab4de6/2e46b0965f9843e3b2de715d2e66b06c [2023-11-26 11:43:47,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:43:47,381 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:43:47,385 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:43:47,385 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:43:47,391 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:43:47,392 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,393 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d50f4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47, skipping insertion in model container [2023-11-26 11:43:47,394 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:43:47" (1/1) ... [2023-11-26 11:43:47,430 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:43:47,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:43:47,679 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 11:43:47,679 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4c5b515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:47, skipping insertion in model container [2023-11-26 11:43:47,680 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:43:47,680 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-26 11:43:47,682 INFO L158 Benchmark]: Toolchain (without parser) took 299.73ms. Allocated memory is still 146.8MB. Free memory was 113.0MB in the beginning and 102.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-26 11:43:47,683 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 146.8MB. Free memory is still 118.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:43:47,683 INFO L158 Benchmark]: CACSL2BoogieTranslator took 294.92ms. Allocated memory is still 146.8MB. Free memory was 113.0MB in the beginning and 102.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-26 11:43:47,685 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 146.8MB. Free memory is still 118.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 294.92ms. Allocated memory is still 146.8MB. Free memory was 113.0MB in the beginning and 102.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: 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_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:43:50,234 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:43:50,325 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-26 11:43:50,332 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:43:50,333 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:43:50,364 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:43:50,365 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:43:50,366 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:43:50,367 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:43:50,367 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:43:50,368 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:43:50,369 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:43:50,370 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:43:50,370 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:43:50,371 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:43:50,372 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:43:50,372 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:43:50,373 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:43:50,374 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:43:50,374 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:43:50,375 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:43:50,376 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:43:50,376 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:43:50,377 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:43:50,377 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:43:50,378 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-26 11:43:50,378 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-26 11:43:50,379 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:43:50,379 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:43:50,380 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:43:50,380 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:43:50,380 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:43:50,381 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:43:50,381 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:43:50,382 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:43:50,382 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:43:50,382 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:43:50,383 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-26 11:43:50,383 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-26 11:43:50,383 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:43:50,384 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:43:50,384 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:43:50,384 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:43:50,385 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-26 11:43:50,385 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_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 [2023-11-26 11:43:50,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:43:50,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:43:50,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:43:50,812 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:43:50,813 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:43:50,814 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2023-11-26 11:43:54,008 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:43:54,290 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:43:54,290 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2023-11-26 11:43:54,298 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/data/0c54f958c/86772a0b2e8c4cea84741fc901486078/FLAGa672ccbf0 [2023-11-26 11:43:54,313 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/data/0c54f958c/86772a0b2e8c4cea84741fc901486078 [2023-11-26 11:43:54,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:43:54,317 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:43:54,318 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:43:54,318 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:43:54,324 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:43:54,325 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:43:54" (1/1) ... [2023-11-26 11:43:54,326 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6348b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:54, skipping insertion in model container [2023-11-26 11:43:54,326 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:43:54" (1/1) ... [2023-11-26 11:43:54,355 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:43:54,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:43:54,704 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-26 11:43:54,719 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:43:54,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:43:54,765 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:43:54,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:43:54,852 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:43:54,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:54 WrapperNode [2023-11-26 11:43:54,853 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:43:54,854 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:43:54,855 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:43:54,855 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:43:54,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:54" (1/1) ... [2023-11-26 11:43:54,887 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:54" (1/1) ... [2023-11-26 11:43:54,934 INFO L138 Inliner]: procedures = 26, calls = 42, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 188 [2023-11-26 11:43:54,934 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:43:54,935 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:43:54,936 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:43:54,936 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:43:54,948 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:54" (1/1) ... [2023-11-26 11:43:54,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:54" (1/1) ... [2023-11-26 11:43:54,973 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:54" (1/1) ... [2023-11-26 11:43:54,992 INFO L175 MemorySlicer]: Split 15 memory accesses to 4 slices as follows [2, 2, 2, 9]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-26 11:43:55,000 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:54" (1/1) ... [2023-11-26 11:43:55,001 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:54" (1/1) ... [2023-11-26 11:43:55,038 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:54" (1/1) ... [2023-11-26 11:43:55,043 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:54" (1/1) ... [2023-11-26 11:43:55,046 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:54" (1/1) ... [2023-11-26 11:43:55,048 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:54" (1/1) ... [2023-11-26 11:43:55,063 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:43:55,077 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:43:55,077 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:43:55,078 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:43:55,079 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:54" (1/1) ... [2023-11-26 11:43:55,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:43:55,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:43:55,111 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:43:55,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:43:55,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:43:55,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-26 11:43:55,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-26 11:43:55,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-26 11:43:55,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-26 11:43:55,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:43:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-26 11:43:55,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-26 11:43:55,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-26 11:43:55,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-26 11:43:55,164 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:43:55,164 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:43:55,164 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:43:55,164 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:43:55,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:43:55,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:43:55,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:43:55,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:43:55,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-26 11:43:55,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-26 11:43:55,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-26 11:43:55,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-26 11:43:55,170 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 11:43:55,333 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:43:55,336 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:43:56,018 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:43:56,484 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:43:56,484 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 11:43:56,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:43:56 BoogieIcfgContainer [2023-11-26 11:43:56,485 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:43:56,491 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:43:56,491 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:43:56,494 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:43:56,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:43:54" (1/3) ... [2023-11-26 11:43:56,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38229387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:43:56, skipping insertion in model container [2023-11-26 11:43:56,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:43:54" (2/3) ... [2023-11-26 11:43:56,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38229387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:43:56, skipping insertion in model container [2023-11-26 11:43:56,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:43:56" (3/3) ... [2023-11-26 11:43:56,499 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2023-11-26 11:43:56,520 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:43:56,521 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-11-26 11:43:56,521 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:43:56,606 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:43:56,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 69 transitions, 152 flow [2023-11-26 11:43:56,735 INFO L124 PetriNetUnfolderBase]: 6/67 cut-off events. [2023-11-26 11:43:56,735 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:43:56,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 67 events. 6/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 203 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-11-26 11:43:56,742 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 69 transitions, 152 flow [2023-11-26 11:43:56,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 66 transitions, 144 flow [2023-11-26 11:43:56,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:43:56,775 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;@437e50b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:43:56,775 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2023-11-26 11:43:56,781 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:43:56,781 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-26 11:43:56,782 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:43:56,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:43:56,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:43:56,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-26 11:43:56,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:56,789 INFO L85 PathProgramCache]: Analyzing trace with hash 618758, now seen corresponding path program 1 times [2023-11-26 11:43:56,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:43:56,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554784056] [2023-11-26 11:43:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:56,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:43:56,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:43:56,812 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:43:56,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:43:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:56,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:43:56,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:43:57,042 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 11:43:57,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:43:57,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-26 11:43:57,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:43:57,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-26 11:43:57,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:43:57,089 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 11:43:57,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:43:57,119 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 11:43:57,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:43:57,132 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 11:43:57,142 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 11:43:57,142 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:43:57,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:43:57,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554784056] [2023-11-26 11:43:57,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554784056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:57,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:57,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:43:57,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264428501] [2023-11-26 11:43:57,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:57,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:43:57,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:43:57,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:43:57,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:43:57,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 69 [2023-11-26 11:43:57,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:43:57,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:43:57,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 69 [2023-11-26 11:43:57,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:43:57,594 INFO L124 PetriNetUnfolderBase]: 180/475 cut-off events. [2023-11-26 11:43:57,595 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-26 11:43:57,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 475 events. 180/475 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2771 event pairs, 119 based on Foata normal form. 1/360 useless extension candidates. Maximal degree in co-relation 720. Up to 290 conditions per place. [2023-11-26 11:43:57,604 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 27 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-11-26 11:43:57,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 63 transitions, 196 flow [2023-11-26 11:43:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:43:57,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:43:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2023-11-26 11:43:57,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6859903381642513 [2023-11-26 11:43:57,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 142 transitions. [2023-11-26 11:43:57,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 142 transitions. [2023-11-26 11:43:57,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:43:57,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 142 transitions. [2023-11-26 11:43:57,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 11:43:57,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 11:43:57,631 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 11:43:57,633 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 144 flow. Second operand 3 states and 142 transitions. [2023-11-26 11:43:57,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 63 transitions, 196 flow [2023-11-26 11:43:57,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 188 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:43:57,641 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 134 flow [2023-11-26 11:43:57,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2023-11-26 11:43:57,646 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -5 predicate places. [2023-11-26 11:43:57,647 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 134 flow [2023-11-26 11:43:57,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:43:57,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:43:57,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:43:57,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-26 11:43:57,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:43:57,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-26 11:43:57,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:57,851 INFO L85 PathProgramCache]: Analyzing trace with hash 618759, now seen corresponding path program 1 times [2023-11-26 11:43:57,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:43:57,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887769907] [2023-11-26 11:43:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:57,852 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 11:43:57,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:43:57,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:43:57,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:43:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:57,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:43:57,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:43:58,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-26 11:43:58,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:43:58,033 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 11:43:58,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:43:58,053 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 11:43:58,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:43:58,067 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 11:43:58,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:43:58,104 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 11:43:58,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:43:58,119 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 11:43:58,210 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 11:43:58,211 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:43:58,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:43:58,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887769907] [2023-11-26 11:43:58,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887769907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:58,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:58,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:43:58,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107555761] [2023-11-26 11:43:58,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:58,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:43:58,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:43:58,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:43:58,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:43:58,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 69 [2023-11-26 11:43:58,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:58,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:43:58,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 69 [2023-11-26 11:43:58,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:43:59,021 INFO L124 PetriNetUnfolderBase]: 180/477 cut-off events. [2023-11-26 11:43:59,022 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-26 11:43:59,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 782 conditions, 477 events. 180/477 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2773 event pairs, 119 based on Foata normal form. 1/362 useless extension candidates. Maximal degree in co-relation 763. Up to 294 conditions per place. [2023-11-26 11:43:59,032 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 30 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-26 11:43:59,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 202 flow [2023-11-26 11:43:59,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:43:59,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:43:59,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2023-11-26 11:43:59,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7004830917874396 [2023-11-26 11:43:59,041 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 145 transitions. [2023-11-26 11:43:59,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 145 transitions. [2023-11-26 11:43:59,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:43:59,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 145 transitions. [2023-11-26 11:43:59,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 11:43:59,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 11:43:59,048 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 11:43:59,048 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 134 flow. Second operand 3 states and 145 transitions. [2023-11-26 11:43:59,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 202 flow [2023-11-26 11:43:59,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:43:59,051 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 144 flow [2023-11-26 11:43:59,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2023-11-26 11:43:59,053 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -4 predicate places. [2023-11-26 11:43:59,053 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 144 flow [2023-11-26 11:43:59,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:59,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:43:59,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:43:59,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:43:59,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:43:59,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-26 11:43:59,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:43:59,257 INFO L85 PathProgramCache]: Analyzing trace with hash 594647444, now seen corresponding path program 1 times [2023-11-26 11:43:59,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:43:59,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957135249] [2023-11-26 11:43:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:43:59,258 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 11:43:59,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:43:59,259 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:43:59,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:43:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:43:59,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:43:59,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:43:59,399 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 11:43:59,399 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 11:43:59,443 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-26 11:43:59,444 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 11:43:59,592 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 11:43:59,592 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:43:59,593 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:43:59,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957135249] [2023-11-26 11:43:59,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957135249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:43:59,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:43:59,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:43:59,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752635095] [2023-11-26 11:43:59,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:43:59,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:43:59,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:43:59,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:43:59,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:43:59,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 69 [2023-11-26 11:43:59,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:59,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:43:59,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 69 [2023-11-26 11:43:59,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:43:59,967 INFO L124 PetriNetUnfolderBase]: 282/706 cut-off events. [2023-11-26 11:43:59,967 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-26 11:43:59,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163 conditions, 706 events. 282/706 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4392 event pairs, 192 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 1150. Up to 442 conditions per place. [2023-11-26 11:43:59,978 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 31 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-11-26 11:43:59,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 62 transitions, 204 flow [2023-11-26 11:43:59,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:43:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:43:59,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-11-26 11:43:59,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2023-11-26 11:43:59,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-11-26 11:43:59,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-11-26 11:43:59,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:43:59,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-11-26 11:43:59,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 11:43:59,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 11:43:59,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 11:43:59,987 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 144 flow. Second operand 3 states and 135 transitions. [2023-11-26 11:43:59,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 62 transitions, 204 flow [2023-11-26 11:43:59,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 62 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:43:59,991 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 140 flow [2023-11-26 11:43:59,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2023-11-26 11:43:59,993 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -5 predicate places. [2023-11-26 11:43:59,993 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 140 flow [2023-11-26 11:43:59,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:43:59,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:43:59,994 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-26 11:44:00,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:00,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:00,197 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-26 11:44:00,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:00,198 INFO L85 PathProgramCache]: Analyzing trace with hash 594647455, now seen corresponding path program 1 times [2023-11-26 11:44:00,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:44:00,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286839462] [2023-11-26 11:44:00,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:00,199 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 11:44:00,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:44:00,200 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:00,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:00,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:44:00,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:00,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-26 11:44:00,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:00,374 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 11:44:00,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:00,386 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 11:44:00,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:00,399 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 11:44:00,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:00,418 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 11:44:00,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:00,433 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 11:44:00,651 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 11:44:00,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:01,133 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 11:44:01,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:44:01,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286839462] [2023-11-26 11:44:01,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286839462] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:01,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:44:01,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-26 11:44:01,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947030566] [2023-11-26 11:44:01,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:01,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:44:01,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:44:01,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:44:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:44:02,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 69 [2023-11-26 11:44:02,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 140 flow. Second operand has 10 states, 10 states have (on average 38.0) internal successors, (380), 10 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:02,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:02,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 69 [2023-11-26 11:44:02,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:03,351 INFO L124 PetriNetUnfolderBase]: 183/481 cut-off events. [2023-11-26 11:44:03,351 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-26 11:44:03,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806 conditions, 481 events. 183/481 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2772 event pairs, 119 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 798. Up to 297 conditions per place. [2023-11-26 11:44:03,356 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 30 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2023-11-26 11:44:03,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 72 transitions, 254 flow [2023-11-26 11:44:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:44:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:44:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 377 transitions. [2023-11-26 11:44:03,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.607085346215781 [2023-11-26 11:44:03,359 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 377 transitions. [2023-11-26 11:44:03,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 377 transitions. [2023-11-26 11:44:03,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:03,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 377 transitions. [2023-11-26 11:44:03,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 41.888888888888886) internal successors, (377), 9 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:03,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 69.0) internal successors, (690), 10 states have internal predecessors, (690), 0 states have call successors, (0), 0 states 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 11:44:03,364 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 69.0) internal successors, (690), 10 states have internal predecessors, (690), 0 states have call successors, (0), 0 states 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 11:44:03,364 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 140 flow. Second operand 9 states and 377 transitions. [2023-11-26 11:44:03,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 72 transitions, 254 flow [2023-11-26 11:44:03,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 72 transitions, 253 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:44:03,368 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 213 flow [2023-11-26 11:44:03,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=213, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2023-11-26 11:44:03,369 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2023-11-26 11:44:03,369 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 213 flow [2023-11-26 11:44:03,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 38.0) internal successors, (380), 10 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:03,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:03,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:44:03,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:03,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:03,573 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-26 11:44:03,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:03,573 INFO L85 PathProgramCache]: Analyzing trace with hash 594647445, now seen corresponding path program 1 times [2023-11-26 11:44:03,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:44:03,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913823136] [2023-11-26 11:44:03,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:03,574 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 11:44:03,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:44:03,579 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:03,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:03,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:44:03,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:03,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:03,710 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 11:44:03,720 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 11:44:03,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:03,784 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-26 11:44:03,785 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 11:44:03,796 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 11:44:04,233 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 11:44:04,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:04,640 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 11:44:04,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:44:04,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913823136] [2023-11-26 11:44:04,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913823136] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:04,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:44:04,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-26 11:44:04,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12811717] [2023-11-26 11:44:04,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:04,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:44:04,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:44:04,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:44:04,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:44:05,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 69 [2023-11-26 11:44:05,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 213 flow. Second operand has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:05,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:05,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 69 [2023-11-26 11:44:05,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:06,742 INFO L124 PetriNetUnfolderBase]: 285/710 cut-off events. [2023-11-26 11:44:06,742 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-26 11:44:06,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 710 events. 285/710 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4378 event pairs, 192 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 1194. Up to 447 conditions per place. [2023-11-26 11:44:06,748 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 38 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-11-26 11:44:06,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 70 transitions, 293 flow [2023-11-26 11:44:06,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:44:06,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:44:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 208 transitions. [2023-11-26 11:44:06,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6028985507246377 [2023-11-26 11:44:06,751 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 208 transitions. [2023-11-26 11:44:06,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 208 transitions. [2023-11-26 11:44:06,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:06,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 208 transitions. [2023-11-26 11:44:06,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 11:44:06,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:06,756 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:06,757 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 213 flow. Second operand 5 states and 208 transitions. [2023-11-26 11:44:06,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 70 transitions, 293 flow [2023-11-26 11:44:06,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 70 transitions, 279 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-26 11:44:06,763 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 203 flow [2023-11-26 11:44:06,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2023-11-26 11:44:06,767 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 6 predicate places. [2023-11-26 11:44:06,767 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 203 flow [2023-11-26 11:44:06,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:06,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:06,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:06,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:06,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:06,973 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-26 11:44:06,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:06,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1597460586, now seen corresponding path program 1 times [2023-11-26 11:44:06,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:44:06,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874699977] [2023-11-26 11:44:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:06,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:44:06,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:44:06,975 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:06,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:07,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:44:07,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:07,111 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 11:44:07,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-26 11:44:07,138 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 11:44:07,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-26 11:44:07,159 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 11:44:07,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-26 11:44:07,297 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 11:44:07,297 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:07,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:44:07,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874699977] [2023-11-26 11:44:07,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874699977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:07,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:07,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:44:07,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358996257] [2023-11-26 11:44:07,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:07,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:44:07,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:44:07,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:44:07,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:44:07,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 69 [2023-11-26 11:44:07,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:07,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:07,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 69 [2023-11-26 11:44:07,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:07,629 INFO L124 PetriNetUnfolderBase]: 201/522 cut-off events. [2023-11-26 11:44:07,630 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-26 11:44:07,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 901 conditions, 522 events. 201/522 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2978 event pairs, 132 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 888. Up to 336 conditions per place. [2023-11-26 11:44:07,634 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 41 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-11-26 11:44:07,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 283 flow [2023-11-26 11:44:07,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:44:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:44:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-11-26 11:44:07,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2023-11-26 11:44:07,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-11-26 11:44:07,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-11-26 11:44:07,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:07,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-11-26 11:44:07,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 11:44:07,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 11:44:07,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 11:44:07,639 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 203 flow. Second operand 3 states and 135 transitions. [2023-11-26 11:44:07,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 283 flow [2023-11-26 11:44:07,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 68 transitions, 277 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:44:07,646 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 195 flow [2023-11-26 11:44:07,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-11-26 11:44:07,650 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-11-26 11:44:07,650 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 195 flow [2023-11-26 11:44:07,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:07,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:07,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:07,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:07,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:07,854 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-26 11:44:07,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:07,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1597460585, now seen corresponding path program 1 times [2023-11-26 11:44:07,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:44:07,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410260352] [2023-11-26 11:44:07,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:07,856 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 11:44:07,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:44:07,857 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:07,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:07,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:44:07,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:08,014 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-26 11:44:08,015 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 11 treesize of output 17 [2023-11-26 11:44:08,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:08,056 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-26 11:44:08,056 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 11 treesize of output 13 [2023-11-26 11:44:08,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:08,107 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-26 11:44:08,108 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 11:44:08,766 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 11:44:08,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:09,174 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 11:44:09,175 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:44:09,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410260352] [2023-11-26 11:44:09,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410260352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:09,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:44:09,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-26 11:44:09,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846938366] [2023-11-26 11:44:09,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:09,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:44:09,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:44:09,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:44:09,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:44:10,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 69 [2023-11-26 11:44:10,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 195 flow. Second operand has 10 states, 10 states have (on average 35.4) internal successors, (354), 10 states have internal predecessors, (354), 0 states have call successors, (0), 0 states 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 11:44:10,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:10,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 69 [2023-11-26 11:44:10,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:11,712 INFO L124 PetriNetUnfolderBase]: 201/520 cut-off events. [2023-11-26 11:44:11,712 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-26 11:44:11,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 520 events. 201/520 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2941 event pairs, 132 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 885. Up to 332 conditions per place. [2023-11-26 11:44:11,717 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 38 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-11-26 11:44:11,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 275 flow [2023-11-26 11:44:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:44:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:44:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 208 transitions. [2023-11-26 11:44:11,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6028985507246377 [2023-11-26 11:44:11,720 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 208 transitions. [2023-11-26 11:44:11,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 208 transitions. [2023-11-26 11:44:11,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:11,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 208 transitions. [2023-11-26 11:44:11,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 11:44:11,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:11,722 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:11,723 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 195 flow. Second operand 5 states and 208 transitions. [2023-11-26 11:44:11,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 275 flow [2023-11-26 11:44:11,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:44:11,726 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 198 flow [2023-11-26 11:44:11,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2023-11-26 11:44:11,727 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 4 predicate places. [2023-11-26 11:44:11,727 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 198 flow [2023-11-26 11:44:11,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 35.4) internal successors, (354), 10 states have internal predecessors, (354), 0 states have call successors, (0), 0 states 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 11:44:11,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:11,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:11,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:11,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:11,931 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-26 11:44:11,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:11,931 INFO L85 PathProgramCache]: Analyzing trace with hash 2018395151, now seen corresponding path program 1 times [2023-11-26 11:44:11,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:44:11,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729646587] [2023-11-26 11:44:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:11,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-26 11:44:11,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:44:11,934 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:11,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:12,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:44:12,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:12,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-26 11:44:12,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:12,057 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 11:44:12,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:12,066 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 11:44:12,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:12,071 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 11:44:12,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:12,076 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 11:44:12,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:12,084 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 11:44:12,109 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 11:44:12,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:12,110 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:44:12,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729646587] [2023-11-26 11:44:12,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729646587] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:12,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:12,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:44:12,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237588701] [2023-11-26 11:44:12,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:12,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:12,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:44:12,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:12,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:12,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 69 [2023-11-26 11:44:12,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:12,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:12,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 69 [2023-11-26 11:44:12,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:12,579 INFO L124 PetriNetUnfolderBase]: 183/406 cut-off events. [2023-11-26 11:44:12,580 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-26 11:44:12,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 406 events. 183/406 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1913 event pairs, 119 based on Foata normal form. 0/371 useless extension candidates. Maximal degree in co-relation 741. Up to 292 conditions per place. [2023-11-26 11:44:12,583 INFO L140 encePairwiseOnDemand]: 59/69 looper letters, 35 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-11-26 11:44:12,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 58 transitions, 262 flow [2023-11-26 11:44:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:44:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2023-11-26 11:44:12,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2023-11-26 11:44:12,585 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 153 transitions. [2023-11-26 11:44:12,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 153 transitions. [2023-11-26 11:44:12,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:12,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 153 transitions. [2023-11-26 11:44:12,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:12,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:12,588 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:12,588 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 198 flow. Second operand 4 states and 153 transitions. [2023-11-26 11:44:12,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 58 transitions, 262 flow [2023-11-26 11:44:12,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 58 transitions, 256 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:44:12,591 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 186 flow [2023-11-26 11:44:12,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-11-26 11:44:12,592 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -4 predicate places. [2023-11-26 11:44:12,592 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 186 flow [2023-11-26 11:44:12,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:12,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:12,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:12,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:12,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:12,795 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-26 11:44:12,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2018395152, now seen corresponding path program 1 times [2023-11-26 11:44:12,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:44:12,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173878879] [2023-11-26 11:44:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:12,796 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 11:44:12,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:44:12,797 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:12,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:12,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:44:12,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:13,017 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 11:44:13,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:13,209 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 35 treesize of output 31 [2023-11-26 11:44:13,335 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 11:44:13,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:44:13,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173878879] [2023-11-26 11:44:13,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173878879] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:13,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:44:13,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-26 11:44:13,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935047096] [2023-11-26 11:44:13,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:13,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:44:13,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:44:13,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:44:13,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:14,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 69 [2023-11-26 11:44:14,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 186 flow. Second operand has 8 states, 8 states have (on average 39.0) internal successors, (312), 8 states have internal predecessors, (312), 0 states have call successors, (0), 0 states 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 11:44:14,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:14,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 69 [2023-11-26 11:44:14,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:15,462 INFO L124 PetriNetUnfolderBase]: 418/797 cut-off events. [2023-11-26 11:44:15,462 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-26 11:44:15,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 797 events. 418/797 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4100 event pairs, 140 based on Foata normal form. 0/683 useless extension candidates. Maximal degree in co-relation 1492. Up to 378 conditions per place. [2023-11-26 11:44:15,469 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 56 selfloop transitions, 8 changer transitions 0/81 dead transitions. [2023-11-26 11:44:15,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 363 flow [2023-11-26 11:44:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:44:15,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:44:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 281 transitions. [2023-11-26 11:44:15,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.678743961352657 [2023-11-26 11:44:15,473 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 281 transitions. [2023-11-26 11:44:15,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 281 transitions. [2023-11-26 11:44:15,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:15,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 281 transitions. [2023-11-26 11:44:15,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 46.833333333333336) internal successors, (281), 6 states have internal predecessors, (281), 0 states have call successors, (0), 0 states 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 11:44:15,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states 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 11:44:15,476 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states 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 11:44:15,476 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 186 flow. Second operand 6 states and 281 transitions. [2023-11-26 11:44:15,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 363 flow [2023-11-26 11:44:15,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 357 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:44:15,480 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 207 flow [2023-11-26 11:44:15,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2023-11-26 11:44:15,481 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2023-11-26 11:44:15,481 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 207 flow [2023-11-26 11:44:15,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 39.0) internal successors, (312), 8 states have internal predecessors, (312), 0 states have call successors, (0), 0 states 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 11:44:15,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:15,482 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-26 11:44:15,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:15,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:15,685 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-26 11:44:15,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:15,686 INFO L85 PathProgramCache]: Analyzing trace with hash -801018009, now seen corresponding path program 2 times [2023-11-26 11:44:15,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:44:15,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285922826] [2023-11-26 11:44:15,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:44:15,686 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 11:44:15,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:44:15,687 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:15,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:15,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:44:15,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:44:15,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:44:15,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:15,820 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 11:44:15,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:15,844 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 11:44:15,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:15,854 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 11:44:15,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:15,862 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 11:44:15,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:15,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:44:15,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:15,881 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 11:44:16,202 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 11:44:16,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:17,351 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 11:44:17,351 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:44:17,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285922826] [2023-11-26 11:44:17,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285922826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:17,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:44:17,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-26 11:44:17,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311936472] [2023-11-26 11:44:17,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:17,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:44:17,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:44:17,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:44:17,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:44:21,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 69 [2023-11-26 11:44:21,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 207 flow. Second operand has 14 states, 14 states have (on average 38.57142857142857) internal successors, (540), 14 states have internal predecessors, (540), 0 states have call successors, (0), 0 states 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 11:44:21,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:21,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 69 [2023-11-26 11:44:21,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:26,081 INFO L124 PetriNetUnfolderBase]: 326/722 cut-off events. [2023-11-26 11:44:26,082 INFO L125 PetriNetUnfolderBase]: For 116/135 co-relation queries the response was YES. [2023-11-26 11:44:26,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1442 conditions, 722 events. 326/722 cut-off events. For 116/135 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4011 event pairs, 228 based on Foata normal form. 6/661 useless extension candidates. Maximal degree in co-relation 1427. Up to 525 conditions per place. [2023-11-26 11:44:26,088 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 31 selfloop transitions, 29 changer transitions 0/77 dead transitions. [2023-11-26 11:44:26,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 77 transitions, 447 flow [2023-11-26 11:44:26,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 11:44:26,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-26 11:44:26,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 842 transitions. [2023-11-26 11:44:26,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5810904071773637 [2023-11-26 11:44:26,095 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 842 transitions. [2023-11-26 11:44:26,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 842 transitions. [2023-11-26 11:44:26,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:26,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 842 transitions. [2023-11-26 11:44:26,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 40.095238095238095) internal successors, (842), 21 states have internal predecessors, (842), 0 states have call successors, (0), 0 states 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 11:44:26,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 69.0) internal successors, (1518), 22 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states 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 11:44:26,114 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 69.0) internal successors, (1518), 22 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states 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 11:44:26,115 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 207 flow. Second operand 21 states and 842 transitions. [2023-11-26 11:44:26,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 77 transitions, 447 flow [2023-11-26 11:44:26,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 77 transitions, 440 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:44:26,122 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 408 flow [2023-11-26 11:44:26,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=408, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2023-11-26 11:44:26,124 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 23 predicate places. [2023-11-26 11:44:26,124 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 408 flow [2023-11-26 11:44:26,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 38.57142857142857) internal successors, (540), 14 states have internal predecessors, (540), 0 states have call successors, (0), 0 states 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 11:44:26,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:26,125 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:26,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:26,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:26,328 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-26 11:44:26,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:26,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1647455532, now seen corresponding path program 1 times [2023-11-26 11:44:26,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:44:26,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684797491] [2023-11-26 11:44:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:26,329 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 11:44:26,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:44:26,330 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:26,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:26,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 11:44:26,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:26,475 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 11:44:26,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:26,491 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 11:44:26,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:26,504 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 11:44:26,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:26,527 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 11:44:26,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:26,540 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 11:44:26,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:44:26,549 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 11:44:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:44:26,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:27,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:44:27,987 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:44:27,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684797491] [2023-11-26 11:44:27,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684797491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:27,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:44:27,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-26 11:44:27,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314222262] [2023-11-26 11:44:27,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:27,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:44:27,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:44:27,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:44:27,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:44:36,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 69 [2023-11-26 11:44:36,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 408 flow. Second operand has 11 states, 11 states have (on average 37.81818181818182) internal successors, (416), 11 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 11:44:36,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:36,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 69 [2023-11-26 11:44:36,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:39,687 INFO L124 PetriNetUnfolderBase]: 1056/2167 cut-off events. [2023-11-26 11:44:39,687 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2023-11-26 11:44:39,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4223 conditions, 2167 events. 1056/2167 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14151 event pairs, 588 based on Foata normal form. 0/1942 useless extension candidates. Maximal degree in co-relation 4202. Up to 600 conditions per place. [2023-11-26 11:44:39,703 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 119 selfloop transitions, 28 changer transitions 0/163 dead transitions. [2023-11-26 11:44:39,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 163 transitions, 892 flow [2023-11-26 11:44:39,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:44:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:44:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 487 transitions. [2023-11-26 11:44:39,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7057971014492753 [2023-11-26 11:44:39,707 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 487 transitions. [2023-11-26 11:44:39,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 487 transitions. [2023-11-26 11:44:39,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:39,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 487 transitions. [2023-11-26 11:44:39,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 48.7) internal successors, (487), 10 states have internal predecessors, (487), 0 states have call successors, (0), 0 states 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 11:44:39,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 69.0) internal successors, (759), 11 states have internal predecessors, (759), 0 states have call successors, (0), 0 states 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 11:44:39,711 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 69.0) internal successors, (759), 11 states have internal predecessors, (759), 0 states have call successors, (0), 0 states 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 11:44:39,711 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 408 flow. Second operand 10 states and 487 transitions. [2023-11-26 11:44:39,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 163 transitions, 892 flow [2023-11-26 11:44:39,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 163 transitions, 804 flow, removed 33 selfloop flow, removed 8 redundant places. [2023-11-26 11:44:39,717 INFO L231 Difference]: Finished difference. Result has 93 places, 83 transitions, 412 flow [2023-11-26 11:44:39,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=412, PETRI_PLACES=93, PETRI_TRANSITIONS=83} [2023-11-26 11:44:39,718 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 26 predicate places. [2023-11-26 11:44:39,719 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 83 transitions, 412 flow [2023-11-26 11:44:39,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 37.81818181818182) internal successors, (416), 11 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 11:44:39,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:39,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:39,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:39,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:39,922 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-26 11:44:39,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:39,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1471706825, now seen corresponding path program 1 times [2023-11-26 11:44:39,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-26 11:44:39,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866508559] [2023-11-26 11:44:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:39,924 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 11:44:39,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat [2023-11-26 11:44:39,925 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/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 11:44:39,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9abc6f3-89be-48ed-9891-ec04dfd21e75/bin/uautomizer-verify-VRDe98Ueme/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-26 11:44:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:40,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:44:40,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:40,172 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 11:44:40,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:40,462 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 35 treesize of output 31 [2023-11-26 11:44:40,606 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 11:44:40,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-26 11:44:40,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866508559] [2023-11-26 11:44:40,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866508559] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:40,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:44:40,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-26 11:44:40,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628779758] [2023-11-26 11:44:40,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:40,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:44:40,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-26 11:44:40,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:44:40,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:41,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 69 [2023-11-26 11:44:41,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 83 transitions, 412 flow. Second operand has 8 states, 8 states have (on average 33.5) internal successors, (268), 8 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 11:44:41,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:41,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 69 [2023-11-26 11:44:41,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand