./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:01:24,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:01:24,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:01:24,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:01:24,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:01:24,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:01:24,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:01:24,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:01:24,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:01:24,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:01:24,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:01:24,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:01:24,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:01:24,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:01:24,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:01:24,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:01:24,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:01:24,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:01:24,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:01:24,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:01:24,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:01:24,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:01:24,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:01:24,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:01:24,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:01:24,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:01:24,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:01:24,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:01:24,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:01:24,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:01:24,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:01:24,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:01:24,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:01:24,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:01:24,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:01:24,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:01:24,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:01:24,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:01:24,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:01:24,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:01:24,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:01:24,398 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 18:01:24,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:01:24,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:01:24,416 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:01:24,417 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:01:24,417 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:01:24,417 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:01:24,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:01:24,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:01:24,418 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:01:24,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:01:24,418 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:01:24,419 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 18:01:24,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:01:24,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:01:24,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:01:24,419 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 18:01:24,419 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 18:01:24,419 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 18:01:24,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:01:24,420 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 18:01:24,420 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:01:24,420 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:01:24,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:01:24,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:01:24,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:01:24,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:01:24,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:01:24,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:01:24,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:01:24,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:01:24,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:01:24,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2021-12-06 18:01:24,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:01:24,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:01:24,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:01:24,611 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:01:24,611 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:01:24,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2021-12-06 18:01:24,657 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/data/ded00ada0/4e760ce6399d40059d603267e7b0bf18/FLAGad3976ac4 [2021-12-06 18:01:25,264 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:01:25,265 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2021-12-06 18:01:25,297 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/data/ded00ada0/4e760ce6399d40059d603267e7b0bf18/FLAGad3976ac4 [2021-12-06 18:01:25,710 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/data/ded00ada0/4e760ce6399d40059d603267e7b0bf18 [2021-12-06 18:01:25,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:01:25,717 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:01:25,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:01:25,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:01:25,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:01:25,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:01:25" (1/1) ... [2021-12-06 18:01:25,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2840f86c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:01:25, skipping insertion in model container [2021-12-06 18:01:25,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:01:25" (1/1) ... [2021-12-06 18:01:25,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:01:25,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:01:26,341 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2021-12-06 18:01:26,371 WARN L564 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-12-06 18:01:26,593 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:01:26,633 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-06 18:01:26,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7eb44270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:01:26, skipping insertion in model container [2021-12-06 18:01:26,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:01:26,634 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-06 18:01:26,636 INFO L158 Benchmark]: Toolchain (without parser) took 918.20ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 61.5MB in the beginning and 66.0MB in the end (delta: -4.6MB). Peak memory consumption was 42.1MB. Max. memory is 16.1GB. [2021-12-06 18:01:26,636 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 88.1MB. Free memory was 60.8MB in the beginning and 60.8MB in the end (delta: 24.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:01:26,637 INFO L158 Benchmark]: CACSL2BoogieTranslator took 914.92ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 61.5MB in the beginning and 66.0MB in the end (delta: -4.6MB). Peak memory consumption was 42.1MB. Max. memory is 16.1GB. [2021-12-06 18:01:26,638 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 88.1MB. Free memory was 60.8MB in the beginning and 60.8MB in the end (delta: 24.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 914.92ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 61.5MB in the beginning and 66.0MB in the end (delta: -4.6MB). Peak memory consumption was 42.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2246]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type 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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:01:28,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:01:28,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:01:28,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:01:28,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:01:28,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:01:28,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:01:28,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:01:28,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:01:28,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:01:28,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:01:28,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:01:28,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:01:28,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:01:28,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:01:28,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:01:28,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:01:28,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:01:28,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:01:28,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:01:28,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:01:28,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:01:28,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:01:28,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:01:28,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:01:28,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:01:28,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:01:28,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:01:28,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:01:28,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:01:28,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:01:28,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:01:28,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:01:28,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:01:28,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:01:28,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:01:28,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:01:28,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:01:28,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:01:28,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:01:28,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:01:28,166 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-06 18:01:28,185 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:01:28,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:01:28,186 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:01:28,186 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:01:28,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:01:28,186 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:01:28,187 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:01:28,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:01:28,187 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:01:28,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:01:28,187 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:01:28,187 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 18:01:28,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:01:28,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:01:28,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:01:28,188 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 18:01:28,188 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 18:01:28,188 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 18:01:28,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:01:28,188 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 18:01:28,189 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 18:01:28,189 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 18:01:28,189 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:01:28,189 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:01:28,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:01:28,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:01:28,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:01:28,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:01:28,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:01:28,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:01:28,190 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 18:01:28,190 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 18:01:28,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:01:28,190 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 18:01:28,190 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2021-12-06 18:01:28,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:01:28,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:01:28,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:01:28,451 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:01:28,452 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:01:28,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2021-12-06 18:01:28,494 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/data/b05fcaf5e/41e9a2dc39b64df8acc29aae8af0a3b8/FLAG6a156b6ed [2021-12-06 18:01:29,086 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:01:29,086 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2021-12-06 18:01:29,117 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/data/b05fcaf5e/41e9a2dc39b64df8acc29aae8af0a3b8/FLAG6a156b6ed [2021-12-06 18:01:29,547 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/data/b05fcaf5e/41e9a2dc39b64df8acc29aae8af0a3b8 [2021-12-06 18:01:29,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:01:29,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:01:29,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:01:29,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:01:29,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:01:29,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:01:29" (1/1) ... [2021-12-06 18:01:29,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20eb3882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:01:29, skipping insertion in model container [2021-12-06 18:01:29,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:01:29" (1/1) ... [2021-12-06 18:01:29,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:01:29,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:01:30,178 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2021-12-06 18:01:30,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:01:30,496 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-06 18:01:30,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:01:30,620 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2021-12-06 18:01:30,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:01:30,789 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:01:30,828 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2021-12-06 18:01:30,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:01:31,029 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:01:31,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:01:31 WrapperNode [2021-12-06 18:01:31,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:01:31,030 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:01:31,030 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:01:31,030 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:01:31,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:01:31" (1/1) ... [2021-12-06 18:01:31,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:01:31" (1/1) ... [2021-12-06 18:01:31,208 INFO L137 Inliner]: procedures = 142, calls = 2887, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3022 [2021-12-06 18:01:31,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:01:31,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:01:31,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:01:31,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:01:31,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:01:31" (1/1) ... [2021-12-06 18:01:31,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:01:31" (1/1) ... [2021-12-06 18:01:31,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:01:31" (1/1) ... [2021-12-06 18:01:31,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:01:31" (1/1) ... [2021-12-06 18:01:31,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:01:31" (1/1) ... [2021-12-06 18:01:31,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:01:31" (1/1) ... [2021-12-06 18:01:31,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:01:31" (1/1) ... [2021-12-06 18:01:31,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:01:31,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:01:31,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:01:31,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:01:31,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:01:31" (1/1) ... [2021-12-06 18:01:31,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:01:31,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:01:31,359 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:01:31,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:01:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2021-12-06 18:01:31,387 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2021-12-06 18:01:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-06 18:01:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-06 18:01:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-06 18:01:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-12-06 18:01:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-06 18:01:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-06 18:01:31,387 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-06 18:01:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2021-12-06 18:01:31,387 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2021-12-06 18:01:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2021-12-06 18:01:31,387 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2021-12-06 18:01:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2021-12-06 18:01:31,388 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2021-12-06 18:01:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-12-06 18:01:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-06 18:01:31,388 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-06 18:01:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-12-06 18:01:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-12-06 18:01:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2021-12-06 18:01:31,388 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2021-12-06 18:01:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-12-06 18:01:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-06 18:01:31,388 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-06 18:01:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-06 18:01:31,388 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-06 18:01:31,388 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2021-12-06 18:01:31,389 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2021-12-06 18:01:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2021-12-06 18:01:31,389 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2021-12-06 18:01:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 18:01:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:01:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2021-12-06 18:01:31,389 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2021-12-06 18:01:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2021-12-06 18:01:31,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2021-12-06 18:01:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:01:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 18:01:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-06 18:01:31,389 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-06 18:01:31,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-12-06 18:01:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-12-06 18:01:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-12-06 18:01:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 18:01:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2021-12-06 18:01:31,390 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2021-12-06 18:01:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-06 18:01:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-12-06 18:01:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:01:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-06 18:01:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-12-06 18:01:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 18:01:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-12-06 18:01:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-06 18:01:31,390 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-06 18:01:31,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2021-12-06 18:01:31,391 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2021-12-06 18:01:31,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-12-06 18:01:31,391 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2021-12-06 18:01:31,391 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2021-12-06 18:01:31,391 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2021-12-06 18:01:31,391 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2021-12-06 18:01:31,391 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2021-12-06 18:01:31,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2021-12-06 18:01:31,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:01:31,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:01:31,674 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:01:31,675 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:01:31,723 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:31,732 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-06 18:01:31,732 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-06 18:01:31,736 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:32,121 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2021-12-06 18:01:32,122 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2021-12-06 18:01:32,160 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:32,173 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-06 18:01:32,173 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-06 18:01:32,177 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:34,286 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:34,301 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:34,329 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2021-12-06 18:01:34,329 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2021-12-06 18:01:34,330 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:34,331 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:34,331 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:34,603 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2021-12-06 18:01:34,604 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2021-12-06 18:01:34,604 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2021-12-06 18:01:34,604 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2021-12-06 18:01:34,604 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2021-12-06 18:01:34,604 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2021-12-06 18:01:34,607 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:34,618 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:34,621 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:38,356 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2021-12-06 18:01:38,357 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2021-12-06 18:01:38,357 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2021-12-06 18:01:38,357 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2021-12-06 18:01:38,357 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2021-12-06 18:01:38,357 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2021-12-06 18:01:38,460 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:38,541 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-06 18:01:38,541 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-06 18:01:38,547 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:38,548 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:38,550 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:38,552 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:38,552 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:38,555 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:38,556 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:38,557 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 18:01:41,714 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2021-12-06 18:01:41,714 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2021-12-06 18:01:41,714 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2021-12-06 18:01:41,714 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2021-12-06 18:01:41,714 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2021-12-06 18:01:41,714 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2021-12-06 18:01:41,715 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2021-12-06 18:01:41,715 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2021-12-06 18:01:41,715 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2021-12-06 18:01:41,715 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2021-12-06 18:01:41,715 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2021-12-06 18:01:41,715 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2021-12-06 18:01:41,715 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2021-12-06 18:01:41,715 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2021-12-06 18:01:41,715 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2021-12-06 18:01:41,715 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2021-12-06 18:01:41,723 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:01:41,738 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:01:41,738 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 18:01:41,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:01:41 BoogieIcfgContainer [2021-12-06 18:01:41,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:01:41,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:01:41,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:01:41,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:01:41,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:01:29" (1/3) ... [2021-12-06 18:01:41,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be3c60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:01:41, skipping insertion in model container [2021-12-06 18:01:41,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:01:31" (2/3) ... [2021-12-06 18:01:41,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be3c60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:01:41, skipping insertion in model container [2021-12-06 18:01:41,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:01:41" (3/3) ... [2021-12-06 18:01:41,748 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2021-12-06 18:01:41,751 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:01:41,752 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 954 error locations. [2021-12-06 18:01:41,805 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:01:41,812 INFO L339 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=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:01:41,812 INFO L340 AbstractCegarLoop]: Starting to check reachability of 954 error locations. [2021-12-06 18:01:41,861 INFO L276 IsEmpty]: Start isEmpty. Operand has 2081 states, 1019 states have (on average 2.154072620215898) internal successors, (2195), 1997 states have internal predecessors, (2195), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2021-12-06 18:01:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-06 18:01:41,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:41,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-06 18:01:41,867 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-12-06 18:01:41,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:41,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1700083, now seen corresponding path program 1 times [2021-12-06 18:01:41,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:01:41,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762323500] [2021-12-06 18:01:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:41,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:01:41,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:01:41,892 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:01:41,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 18:01:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:43,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 18:01:43,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:43,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:01:43,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:01:43,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:01:43,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:01:43,536 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-12-06 18:01:43,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 18 treesize of output 38 [2021-12-06 18:01:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:43,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:01:43,643 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:01:43,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762323500] [2021-12-06 18:01:43,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762323500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:01:43,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:01:43,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:01:43,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602353336] [2021-12-06 18:01:43,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:01:43,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:01:43,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:01:43,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:01:43,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:01:43,672 INFO L87 Difference]: Start difference. First operand has 2081 states, 1019 states have (on average 2.154072620215898) internal successors, (2195), 1997 states have internal predecessors, (2195), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:43,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:01:43,767 INFO L93 Difference]: Finished difference Result 2078 states and 2350 transitions. [2021-12-06 18:01:43,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:01:43,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-06 18:01:43,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:01:43,788 INFO L225 Difference]: With dead ends: 2078 [2021-12-06 18:01:43,788 INFO L226 Difference]: Without dead ends: 2076 [2021-12-06 18:01:43,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:01:43,791 INFO L933 BasicCegarLoop]: 2348 mSDtfsCounter, 0 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3719 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 978 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:01:43,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3719 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 978 Unchecked, 0.0s Time] [2021-12-06 18:01:43,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-12-06 18:01:43,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 2076. [2021-12-06 18:01:43,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 1017 states have (on average 2.144542772861357) internal successors, (2181), 1992 states have internal predecessors, (2181), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-06 18:01:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 2348 transitions. [2021-12-06 18:01:43,884 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 2348 transitions. Word has length 3 [2021-12-06 18:01:43,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:01:43,885 INFO L470 AbstractCegarLoop]: Abstraction has 2076 states and 2348 transitions. [2021-12-06 18:01:43,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:43,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 2348 transitions. [2021-12-06 18:01:43,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-06 18:01:43,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:43,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-06 18:01:43,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:01:44,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:01:44,087 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-12-06 18:01:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:44,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1700084, now seen corresponding path program 1 times [2021-12-06 18:01:44,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:01:44,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641959136] [2021-12-06 18:01:44,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:44,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:01:44,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:01:44,102 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:01:44,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 18:01:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:45,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 18:01:45,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:45,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:01:45,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:01:45,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:01:45,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:01:45,830 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-12-06 18:01:45,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 18 treesize of output 47 [2021-12-06 18:01:45,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3862 treesize of output 3830 [2021-12-06 18:01:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:46,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:01:46,243 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:01:46,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641959136] [2021-12-06 18:01:46,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641959136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:01:46,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:01:46,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:01:46,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538381759] [2021-12-06 18:01:46,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:01:46,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:01:46,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:01:46,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:01:46,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:01:46,246 INFO L87 Difference]: Start difference. First operand 2076 states and 2348 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:50,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:01:50,467 INFO L93 Difference]: Finished difference Result 2074 states and 2346 transitions. [2021-12-06 18:01:50,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:01:50,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-06 18:01:50,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:01:50,477 INFO L225 Difference]: With dead ends: 2074 [2021-12-06 18:01:50,477 INFO L226 Difference]: Without dead ends: 2074 [2021-12-06 18:01:50,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:01:50,478 INFO L933 BasicCegarLoop]: 2341 mSDtfsCounter, 6 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 3726 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:01:50,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 3726 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-06 18:01:50,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-12-06 18:01:50,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2021-12-06 18:01:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 1017 states have (on average 2.1425762045231074) internal successors, (2179), 1990 states have internal predecessors, (2179), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-06 18:01:50,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 2346 transitions. [2021-12-06 18:01:50,523 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 2346 transitions. Word has length 3 [2021-12-06 18:01:50,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:01:50,524 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 2346 transitions. [2021-12-06 18:01:50,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:50,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 2346 transitions. [2021-12-06 18:01:50,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-06 18:01:50,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:50,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-06 18:01:50,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 18:01:50,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:01:50,726 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-12-06 18:01:50,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:50,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1633832820, now seen corresponding path program 1 times [2021-12-06 18:01:50,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:01:50,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371732378] [2021-12-06 18:01:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:50,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:01:50,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:01:50,739 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:01:50,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 18:01:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:51,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 1240 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 18:01:51,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:51,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:01:51,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:01:51,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371732378] [2021-12-06 18:01:51,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371732378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:01:51,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:01:51,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:01:51,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817074742] [2021-12-06 18:01:51,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:01:51,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:01:51,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:01:51,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:01:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:01:51,485 INFO L87 Difference]: Start difference. First operand 2074 states and 2346 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:01:54,440 INFO L93 Difference]: Finished difference Result 2073 states and 2345 transitions. [2021-12-06 18:01:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:01:54,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-06 18:01:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:01:54,449 INFO L225 Difference]: With dead ends: 2073 [2021-12-06 18:01:54,449 INFO L226 Difference]: Without dead ends: 2073 [2021-12-06 18:01:54,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:01:54,450 INFO L933 BasicCegarLoop]: 2310 mSDtfsCounter, 53 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3654 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:01:54,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3654 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 18:01:54,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-12-06 18:01:54,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 2073. [2021-12-06 18:01:54,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 1017 states have (on average 2.1415929203539825) internal successors, (2178), 1989 states have internal predecessors, (2178), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-06 18:01:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 2345 transitions. [2021-12-06 18:01:54,490 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 2345 transitions. Word has length 5 [2021-12-06 18:01:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:01:54,491 INFO L470 AbstractCegarLoop]: Abstraction has 2073 states and 2345 transitions. [2021-12-06 18:01:54,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:54,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 2345 transitions. [2021-12-06 18:01:54,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 18:01:54,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:54,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 18:01:54,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 18:01:54,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:01:54,692 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-12-06 18:01:54,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:54,693 INFO L85 PathProgramCache]: Analyzing trace with hash -890788470, now seen corresponding path program 1 times [2021-12-06 18:01:54,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:01:54,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539811639] [2021-12-06 18:01:54,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:54,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:01:54,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:01:54,695 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:01:54,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 18:01:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:55,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 1246 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:01:55,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:55,539 INFO L354 Elim1Store]: treesize reduction 118, result has 36.2 percent of original size [2021-12-06 18:01:55,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 18 treesize of output 72 [2021-12-06 18:01:55,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-12-06 18:01:55,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 treesize of output 12 [2021-12-06 18:01:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:55,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:01:55,606 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:01:55,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539811639] [2021-12-06 18:01:55,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539811639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:01:55,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:01:55,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:01:55,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789772476] [2021-12-06 18:01:55,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:01:55,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:01:55,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:01:55,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:01:55,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:01:55,608 INFO L87 Difference]: Start difference. First operand 2073 states and 2345 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:59,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:02:05,966 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:02:06,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:02:06,033 INFO L93 Difference]: Finished difference Result 2072 states and 2344 transitions. [2021-12-06 18:02:06,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:02:06,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 18:02:06,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:02:06,042 INFO L225 Difference]: With dead ends: 2072 [2021-12-06 18:02:06,042 INFO L226 Difference]: Without dead ends: 2072 [2021-12-06 18:02:06,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:02:06,043 INFO L933 BasicCegarLoop]: 2340 mSDtfsCounter, 4 mSDsluCounter, 4094 mSDsCounter, 0 mSdLazyCounter, 2931 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6434 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2931 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:02:06,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 6434 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2931 Invalid, 2 Unknown, 0 Unchecked, 10.3s Time] [2021-12-06 18:02:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-12-06 18:02:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2021-12-06 18:02:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1017 states have (on average 2.1406096361848572) internal successors, (2177), 1988 states have internal predecessors, (2177), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-06 18:02:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2344 transitions. [2021-12-06 18:02:06,079 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2344 transitions. Word has length 6 [2021-12-06 18:02:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:02:06,079 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 2344 transitions. [2021-12-06 18:02:06,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:02:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2344 transitions. [2021-12-06 18:02:06,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 18:02:06,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:02:06,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 18:02:06,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-06 18:02:06,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:02:06,281 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-12-06 18:02:06,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:02:06,283 INFO L85 PathProgramCache]: Analyzing trace with hash -890788469, now seen corresponding path program 1 times [2021-12-06 18:02:06,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:02:06,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363301217] [2021-12-06 18:02:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:02:06,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:02:06,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:02:06,291 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:02:06,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 18:02:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:02:07,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 1246 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:02:07,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:02:07,340 INFO L354 Elim1Store]: treesize reduction 130, result has 29.7 percent of original size [2021-12-06 18:02:07,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 18 treesize of output 60 [2021-12-06 18:02:07,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-12-06 18:02:07,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-12-06 18:02:07,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2021-12-06 18:02:07,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2021-12-06 18:02:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:07,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:02:07,465 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:02:07,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363301217] [2021-12-06 18:02:07,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363301217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:02:07,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:02:07,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:02:07,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840585037] [2021-12-06 18:02:07,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:02:07,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:02:07,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:02:07,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:02:07,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:02:07,466 INFO L87 Difference]: Start difference. First operand 2072 states and 2344 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:02:12,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:02:19,855 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:02:19,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:02:19,936 INFO L93 Difference]: Finished difference Result 2071 states and 2343 transitions. [2021-12-06 18:02:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:02:19,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 18:02:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:02:19,944 INFO L225 Difference]: With dead ends: 2071 [2021-12-06 18:02:19,945 INFO L226 Difference]: Without dead ends: 2071 [2021-12-06 18:02:19,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:02:19,945 INFO L933 BasicCegarLoop]: 2340 mSDtfsCounter, 2 mSDsluCounter, 4157 mSDsCounter, 0 mSdLazyCounter, 2866 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6497 SdHoareTripleChecker+Invalid, 2869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2866 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:02:19,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 6497 Invalid, 2869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2866 Invalid, 2 Unknown, 0 Unchecked, 12.4s Time] [2021-12-06 18:02:19,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-12-06 18:02:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 2071. [2021-12-06 18:02:19,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1016 states have (on average 2.141732283464567) internal successors, (2176), 1987 states have internal predecessors, (2176), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-06 18:02:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2343 transitions. [2021-12-06 18:02:19,978 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2343 transitions. Word has length 6 [2021-12-06 18:02:19,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:02:19,978 INFO L470 AbstractCegarLoop]: Abstraction has 2071 states and 2343 transitions. [2021-12-06 18:02:19,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:02:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2343 transitions. [2021-12-06 18:02:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 18:02:19,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:02:19,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:02:20,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 18:02:20,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:02:20,180 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-12-06 18:02:20,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:02:20,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1867291348, now seen corresponding path program 1 times [2021-12-06 18:02:20,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:02:20,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252970084] [2021-12-06 18:02:20,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:02:20,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:02:20,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:02:20,190 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:02:20,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 18:02:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:02:21,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:02:21,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:02:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:21,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:02:21,130 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:02:21,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252970084] [2021-12-06 18:02:21,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252970084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:02:21,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:02:21,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:02:21,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27619769] [2021-12-06 18:02:21,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:02:21,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:02:21,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:02:21,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:02:21,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:02:21,131 INFO L87 Difference]: Start difference. First operand 2071 states and 2343 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:02:21,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:02:21,209 INFO L93 Difference]: Finished difference Result 2074 states and 2346 transitions. [2021-12-06 18:02:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:02:21,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-06 18:02:21,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:02:21,218 INFO L225 Difference]: With dead ends: 2074 [2021-12-06 18:02:21,218 INFO L226 Difference]: Without dead ends: 2072 [2021-12-06 18:02:21,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:02:21,219 INFO L933 BasicCegarLoop]: 2341 mSDtfsCounter, 2 mSDsluCounter, 4677 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7018 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:02:21,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 7018 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:02:21,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-12-06 18:02:21,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2021-12-06 18:02:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1017 states have (on average 2.1406096361848572) internal successors, (2177), 1988 states have internal predecessors, (2177), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-06 18:02:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2344 transitions. [2021-12-06 18:02:21,255 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2344 transitions. Word has length 13 [2021-12-06 18:02:21,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:02:21,255 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 2344 transitions. [2021-12-06 18:02:21,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:02:21,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2344 transitions. [2021-12-06 18:02:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 18:02:21,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:02:21,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:02:21,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 18:02:21,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:02:21,456 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-12-06 18:02:21,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:02:21,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1906515750, now seen corresponding path program 1 times [2021-12-06 18:02:21,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:02:21,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807148170] [2021-12-06 18:02:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:02:21,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:02:21,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:02:21,459 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:02:21,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 18:02:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:02:22,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:02:22,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:02:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:22,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:02:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:22,401 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:02:22,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807148170] [2021-12-06 18:02:22,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807148170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:02:22,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:02:22,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 18:02:22,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284245981] [2021-12-06 18:02:22,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:02:22,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:02:22,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:02:22,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:02:22,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:02:22,403 INFO L87 Difference]: Start difference. First operand 2072 states and 2344 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:02:22,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:02:22,617 INFO L93 Difference]: Finished difference Result 2084 states and 2359 transitions. [2021-12-06 18:02:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:02:22,618 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-12-06 18:02:22,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:02:22,630 INFO L225 Difference]: With dead ends: 2084 [2021-12-06 18:02:22,630 INFO L226 Difference]: Without dead ends: 2082 [2021-12-06 18:02:22,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:02:22,631 INFO L933 BasicCegarLoop]: 2340 mSDtfsCounter, 13 mSDsluCounter, 4678 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 7018 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:02:22,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 7018 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:02:22,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-12-06 18:02:22,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 2082. [2021-12-06 18:02:22,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 1026 states have (on average 2.1335282651072123) internal successors, (2189), 1997 states have internal predecessors, (2189), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-06 18:02:22,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 2356 transitions. [2021-12-06 18:02:22,677 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 2356 transitions. Word has length 14 [2021-12-06 18:02:22,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:02:22,677 INFO L470 AbstractCegarLoop]: Abstraction has 2082 states and 2356 transitions. [2021-12-06 18:02:22,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:02:22,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 2356 transitions. [2021-12-06 18:02:22,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 18:02:22,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:02:22,678 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:02:22,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 18:02:22,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:02:22,879 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-12-06 18:02:22,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:02:22,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1829494956, now seen corresponding path program 2 times [2021-12-06 18:02:22,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:02:22,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766354077] [2021-12-06 18:02:22,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:02:22,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:02:22,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:02:22,883 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:02:22,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 18:02:24,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 18:02:24,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:02:24,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 18:02:24,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:02:24,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:02:24,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:02:24,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:02:24,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:02:24,822 INFO L354 Elim1Store]: treesize reduction 142, result has 24.1 percent of original size [2021-12-06 18:02:24,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 319 treesize of output 342 [2021-12-06 18:03:58,228 INFO L354 Elim1Store]: treesize reduction 32, result has 58.4 percent of original size [2021-12-06 18:03:58,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 132 [2021-12-06 18:04:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:04:19,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:04:19,045 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:04:19,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766354077] [2021-12-06 18:04:19,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766354077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:04:19,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:04:19,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:04:19,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762993555] [2021-12-06 18:04:19,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:04:19,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:04:19,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:04:19,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:04:19,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=9, Unknown=3, NotChecked=0, Total=20 [2021-12-06 18:04:19,046 INFO L87 Difference]: Start difference. First operand 2082 states and 2356 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:04:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:04:19,082 INFO L93 Difference]: Finished difference Result 2083 states and 2356 transitions. [2021-12-06 18:04:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:04:19,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-06 18:04:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:04:19,090 INFO L225 Difference]: With dead ends: 2083 [2021-12-06 18:04:19,090 INFO L226 Difference]: Without dead ends: 2081 [2021-12-06 18:04:19,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=8, Invalid=9, Unknown=3, NotChecked=0, Total=20 [2021-12-06 18:04:19,091 INFO L933 BasicCegarLoop]: 2335 mSDtfsCounter, 0 mSDsluCounter, 2728 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5063 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1948 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:04:19,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 5063 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 1948 Unchecked, 0.0s Time] [2021-12-06 18:04:19,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2021-12-06 18:04:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 2081. [2021-12-06 18:04:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 1026 states have (on average 2.1306042884990255) internal successors, (2186), 1996 states have internal predecessors, (2186), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-06 18:04:19,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 2353 transitions. [2021-12-06 18:04:19,127 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 2353 transitions. Word has length 17 [2021-12-06 18:04:19,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:04:19,127 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 2353 transitions. [2021-12-06 18:04:19,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:04:19,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 2353 transitions. [2021-12-06 18:04:19,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 18:04:19,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:04:19,128 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:04:19,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-06 18:04:19,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:04:19,329 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-12-06 18:04:19,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:04:19,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1829494955, now seen corresponding path program 1 times [2021-12-06 18:04:19,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:04:19,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637813769] [2021-12-06 18:04:19,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:19,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:04:19,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:04:19,331 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:04:19,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 18:04:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:04:20,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:04:20,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:04:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:20,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:04:20,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:20,551 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:04:20,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637813769] [2021-12-06 18:04:20,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637813769] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:04:20,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:04:20,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-06 18:04:20,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152067076] [2021-12-06 18:04:20,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:04:20,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:04:20,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:04:20,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:04:20,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:04:20,552 INFO L87 Difference]: Start difference. First operand 2081 states and 2353 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:04:21,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:04:21,284 INFO L93 Difference]: Finished difference Result 2100 states and 2376 transitions. [2021-12-06 18:04:21,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 18:04:21,285 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-12-06 18:04:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:04:21,294 INFO L225 Difference]: With dead ends: 2100 [2021-12-06 18:04:21,294 INFO L226 Difference]: Without dead ends: 2090 [2021-12-06 18:04:21,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:04:21,295 INFO L933 BasicCegarLoop]: 2341 mSDtfsCounter, 35 mSDsluCounter, 11691 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 14032 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:04:21,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 14032 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:04:21,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-12-06 18:04:21,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2090. [2021-12-06 18:04:21,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 1035 states have (on average 2.1207729468599035) internal successors, (2195), 2005 states have internal predecessors, (2195), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-06 18:04:21,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 2362 transitions. [2021-12-06 18:04:21,339 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 2362 transitions. Word has length 17 [2021-12-06 18:04:21,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:04:21,340 INFO L470 AbstractCegarLoop]: Abstraction has 2090 states and 2362 transitions. [2021-12-06 18:04:21,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:04:21,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 2362 transitions. [2021-12-06 18:04:21,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 18:04:21,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:04:21,341 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:04:21,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 18:04:21,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:04:21,541 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-12-06 18:04:21,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:04:21,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1174908437, now seen corresponding path program 2 times [2021-12-06 18:04:21,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:04:21,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806902353] [2021-12-06 18:04:21,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:04:21,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:04:21,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:04:21,544 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:04:21,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 18:04:24,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 18:04:24,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:04:24,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 18:04:24,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:04:24,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:24,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:24,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:24,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:24,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:24,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:24,908 INFO L354 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2021-12-06 18:04:24,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2021-12-06 18:04:24,981 INFO L354 Elim1Store]: treesize reduction 19, result has 24.0 percent of original size [2021-12-06 18:04:24,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 369 treesize of output 365 [2021-12-06 18:04:25,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:25,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:04:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-06 18:04:25,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:04:25,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:04:25,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806902353] [2021-12-06 18:04:25,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806902353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:04:25,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:04:25,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:04:25,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574811150] [2021-12-06 18:04:25,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:04:25,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:04:25,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:04:25,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:04:25,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:04:25,641 INFO L87 Difference]: Start difference. First operand 2090 states and 2362 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:04:25,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:04:25,682 INFO L93 Difference]: Finished difference Result 2089 states and 2361 transitions. [2021-12-06 18:04:25,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:04:25,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-06 18:04:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:04:25,690 INFO L225 Difference]: With dead ends: 2089 [2021-12-06 18:04:25,690 INFO L226 Difference]: Without dead ends: 2089 [2021-12-06 18:04:25,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:04:25,691 INFO L933 BasicCegarLoop]: 2335 mSDtfsCounter, 6 mSDsluCounter, 2769 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 5104 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1902 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:04:25,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 5104 Invalid, 1905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 1902 Unchecked, 0.0s Time] [2021-12-06 18:04:25,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-12-06 18:04:25,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 2089. [2021-12-06 18:04:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 1035 states have (on average 2.119806763285024) internal successors, (2194), 2004 states have internal predecessors, (2194), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-06 18:04:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 2361 transitions. [2021-12-06 18:04:25,719 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 2361 transitions. Word has length 23 [2021-12-06 18:04:25,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:04:25,719 INFO L470 AbstractCegarLoop]: Abstraction has 2089 states and 2361 transitions. [2021-12-06 18:04:25,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:04:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 2361 transitions. [2021-12-06 18:04:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:04:25,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:04:25,720 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:04:25,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-06 18:04:25,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:04:25,921 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-12-06 18:04:25,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:04:25,921 INFO L85 PathProgramCache]: Analyzing trace with hash -489338443, now seen corresponding path program 1 times [2021-12-06 18:04:25,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:04:25,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694035854] [2021-12-06 18:04:25,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:25,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:04:25,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:04:25,923 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:04:25,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 18:04:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:04:26,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 1398 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 18:04:26,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:04:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:27,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:04:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:27,667 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:04:27,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694035854] [2021-12-06 18:04:27,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694035854] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:04:27,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:04:27,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-06 18:04:27,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140791992] [2021-12-06 18:04:27,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:04:27,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 18:04:27,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:04:27,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 18:04:27,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:04:27,669 INFO L87 Difference]: Start difference. First operand 2089 states and 2361 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:04:30,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:04:30,516 INFO L93 Difference]: Finished difference Result 2123 states and 2405 transitions. [2021-12-06 18:04:30,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 18:04:30,517 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-12-06 18:04:30,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:04:30,530 INFO L225 Difference]: With dead ends: 2123 [2021-12-06 18:04:30,530 INFO L226 Difference]: Without dead ends: 2107 [2021-12-06 18:04:30,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=890, Invalid=1866, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 18:04:30,531 INFO L933 BasicCegarLoop]: 2343 mSDtfsCounter, 114 mSDsluCounter, 25738 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 28081 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:04:30,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 28081 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 18:04:30,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-12-06 18:04:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 2107. [2021-12-06 18:04:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 1053 states have (on average 2.100664767331434) internal successors, (2212), 2022 states have internal predecessors, (2212), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-06 18:04:30,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 2379 transitions. [2021-12-06 18:04:30,556 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 2379 transitions. Word has length 25 [2021-12-06 18:04:30,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:04:30,556 INFO L470 AbstractCegarLoop]: Abstraction has 2107 states and 2379 transitions. [2021-12-06 18:04:30,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:04:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 2379 transitions. [2021-12-06 18:04:30,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:04:30,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:04:30,557 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:04:30,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 18:04:30,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:04:30,758 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-12-06 18:04:30,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:04:30,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1797314357, now seen corresponding path program 2 times [2021-12-06 18:04:30,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:04:30,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698938262] [2021-12-06 18:04:30,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:04:30,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:04:30,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:04:30,768 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:04:30,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 18:04:33,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 18:04:33,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:04:33,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 1288 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 18:04:33,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:04:33,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:04:33,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:04:33,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:04:33,741 INFO L354 Elim1Store]: treesize reduction 345, result has 15.0 percent of original size [2021-12-06 18:04:33,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 24 case distinctions, treesize of input 2280 treesize of output 2299 [2021-12-06 18:04:44,435 INFO L354 Elim1Store]: treesize reduction 55, result has 42.7 percent of original size [2021-12-06 18:04:44,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 96 [2021-12-06 18:04:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-06 18:04:45,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:04:45,375 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:04:45,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698938262] [2021-12-06 18:04:45,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698938262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:04:45,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:04:45,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:04:45,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358819621] [2021-12-06 18:04:45,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:04:45,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:04:45,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:04:45,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:04:45,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:04:45,377 INFO L87 Difference]: Start difference. First operand 2107 states and 2379 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:04:48,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:04:48,803 INFO L93 Difference]: Finished difference Result 2106 states and 2378 transitions. [2021-12-06 18:04:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:04:48,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-12-06 18:04:48,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:04:48,814 INFO L225 Difference]: With dead ends: 2106 [2021-12-06 18:04:48,814 INFO L226 Difference]: Without dead ends: 2106 [2021-12-06 18:04:48,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 0 SyntacticMatches, 34 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:04:48,814 INFO L933 BasicCegarLoop]: 2332 mSDtfsCounter, 6 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3689 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:04:48,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 3689 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 971 Invalid, 0 Unknown, 10 Unchecked, 3.4s Time] [2021-12-06 18:04:48,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-12-06 18:04:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2106. [2021-12-06 18:04:48,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 1053 states have (on average 2.0997150997150995) internal successors, (2211), 2021 states have internal predecessors, (2211), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-06 18:04:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 2378 transitions. [2021-12-06 18:04:48,842 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 2378 transitions. Word has length 37 [2021-12-06 18:04:48,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:04:48,842 INFO L470 AbstractCegarLoop]: Abstraction has 2106 states and 2378 transitions. [2021-12-06 18:04:48,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:04:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 2378 transitions. [2021-12-06 18:04:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:04:48,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:04:48,843 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:04:48,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 18:04:49,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:04:49,045 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-12-06 18:04:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:04:49,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1797314358, now seen corresponding path program 1 times [2021-12-06 18:04:49,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:04:49,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559637667] [2021-12-06 18:04:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:49,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:04:49,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:04:49,055 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:04:49,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 18:04:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:04:50,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 18:04:50,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:04:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:50,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:04:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:53,257 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:04:53,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559637667] [2021-12-06 18:04:53,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559637667] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:04:53,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:04:53,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-06 18:04:53,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326402215] [2021-12-06 18:04:53,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:04:53,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 18:04:53,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:04:53,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 18:04:53,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 18:04:53,260 INFO L87 Difference]: Start difference. First operand 2106 states and 2378 transitions. Second operand has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:05:05,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:05:05,961 INFO L93 Difference]: Finished difference Result 2170 states and 2464 transitions. [2021-12-06 18:05:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-06 18:05:05,962 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2021-12-06 18:05:05,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:05:05,969 INFO L225 Difference]: With dead ends: 2170 [2021-12-06 18:05:05,970 INFO L226 Difference]: Without dead ends: 2142 [2021-12-06 18:05:05,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=3512, Invalid=7830, Unknown=0, NotChecked=0, Total=11342 [2021-12-06 18:05:05,973 INFO L933 BasicCegarLoop]: 2348 mSDtfsCounter, 339 mSDsluCounter, 60923 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 63271 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:05:05,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 63271 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-06 18:05:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-12-06 18:05:05,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2142. [2021-12-06 18:05:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 1089 states have (on average 2.0633608815426996) internal successors, (2247), 2057 states have internal predecessors, (2247), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-06 18:05:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 2414 transitions. [2021-12-06 18:05:05,996 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 2414 transitions. Word has length 37 [2021-12-06 18:05:05,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:05:05,996 INFO L470 AbstractCegarLoop]: Abstraction has 2142 states and 2414 transitions. [2021-12-06 18:05:05,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:05:05,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 2414 transitions. [2021-12-06 18:05:05,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 18:05:05,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:05:05,998 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:05:06,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-06 18:05:06,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:05:06,199 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-12-06 18:05:06,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:05:06,200 INFO L85 PathProgramCache]: Analyzing trace with hash 283062838, now seen corresponding path program 2 times [2021-12-06 18:05:06,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:05:06,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163946943] [2021-12-06 18:05:06,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:05:06,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:05:06,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:05:06,209 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:05:06,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 18:05:10,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 18:05:10,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:05:10,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 1288 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 18:05:10,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:05:10,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 34 [2021-12-06 18:05:10,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:05:10,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:05:10,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:05:10,528 INFO L354 Elim1Store]: treesize reduction 345, result has 15.0 percent of original size [2021-12-06 18:05:10,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 24 case distinctions, treesize of input 2146 treesize of output 2161 [2021-12-06 18:05:28,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:28,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:05:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-12-06 18:05:28,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:05:28,984 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:05:28,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163946943] [2021-12-06 18:05:28,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163946943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:05:28,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:05:28,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:05:28,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557476704] [2021-12-06 18:05:28,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:05:28,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:05:28,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:05:28,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:05:28,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:05:28,986 INFO L87 Difference]: Start difference. First operand 2142 states and 2414 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:05:38,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:05:38,664 INFO L93 Difference]: Finished difference Result 3532 states and 4049 transitions. [2021-12-06 18:05:38,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:05:38,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-12-06 18:05:38,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:05:38,675 INFO L225 Difference]: With dead ends: 3532 [2021-12-06 18:05:38,675 INFO L226 Difference]: Without dead ends: 3532 [2021-12-06 18:05:38,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:05:38,676 INFO L933 BasicCegarLoop]: 1063 mSDtfsCounter, 2704 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2706 SdHoareTripleChecker+Valid, 3076 SdHoareTripleChecker+Invalid, 4205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1268 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:05:38,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2706 Valid, 3076 Invalid, 4205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2894 Invalid, 0 Unknown, 1268 Unchecked, 9.6s Time] [2021-12-06 18:05:38,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3532 states. [2021-12-06 18:05:38,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3532 to 2867. [2021-12-06 18:05:38,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 1748 states have (on average 2.0635011441647597) internal successors, (3607), 2717 states have internal predecessors, (3607), 149 states have call successors, (149), 42 states have call predecessors, (149), 43 states have return successors, (132), 121 states have call predecessors, (132), 126 states have call successors, (132) [2021-12-06 18:05:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 3888 transitions. [2021-12-06 18:05:38,725 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 3888 transitions. Word has length 61 [2021-12-06 18:05:38,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:05:38,725 INFO L470 AbstractCegarLoop]: Abstraction has 2867 states and 3888 transitions. [2021-12-06 18:05:38,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:05:38,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 3888 transitions. [2021-12-06 18:05:38,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 18:05:38,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:05:38,726 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:05:38,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 18:05:38,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:05:38,927 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-12-06 18:05:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:05:38,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1440500246, now seen corresponding path program 1 times [2021-12-06 18:05:38,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:05:38,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522242523] [2021-12-06 18:05:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:05:38,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:05:38,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:05:38,939 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:05:38,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 18:05:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:05:40,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 18:05:40,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:05:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:05:42,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:05:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:05:51,163 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:05:51,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522242523] [2021-12-06 18:05:51,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522242523] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:05:51,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:05:51,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2021-12-06 18:05:51,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33686202] [2021-12-06 18:05:51,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:05:51,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-06 18:05:51,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:05:51,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-06 18:05:51,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2497, Invalid=7009, Unknown=0, NotChecked=0, Total=9506 [2021-12-06 18:05:51,168 INFO L87 Difference]: Start difference. First operand 2867 states and 3888 transitions. Second operand has 98 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 98 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:07:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:07:01,798 INFO L93 Difference]: Finished difference Result 2991 states and 4058 transitions. [2021-12-06 18:07:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2021-12-06 18:07:01,799 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 98 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2021-12-06 18:07:01,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:07:01,805 INFO L225 Difference]: With dead ends: 2991 [2021-12-06 18:07:01,805 INFO L226 Difference]: Without dead ends: 2939 [2021-12-06 18:07:01,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3587 ImplicationChecksByTransitivity, 66.6s TimeCoverageRelationStatistics Valid=13940, Invalid=32070, Unknown=0, NotChecked=0, Total=46010 [2021-12-06 18:07:01,816 INFO L933 BasicCegarLoop]: 2354 mSDtfsCounter, 1355 mSDsluCounter, 110477 mSDsCounter, 0 mSdLazyCounter, 6119 mSolverCounterSat, 1386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 112831 SdHoareTripleChecker+Invalid, 7505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1386 IncrementalHoareTripleChecker+Valid, 6119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:07:01,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1355 Valid, 112831 Invalid, 7505 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1386 Valid, 6119 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2021-12-06 18:07:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2021-12-06 18:07:01,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2939. [2021-12-06 18:07:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 1820 states have (on average 2.0214285714285714) internal successors, (3679), 2789 states have internal predecessors, (3679), 149 states have call successors, (149), 42 states have call predecessors, (149), 43 states have return successors, (132), 121 states have call predecessors, (132), 126 states have call successors, (132) [2021-12-06 18:07:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 3960 transitions. [2021-12-06 18:07:01,852 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 3960 transitions. Word has length 63 [2021-12-06 18:07:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:07:01,852 INFO L470 AbstractCegarLoop]: Abstraction has 2939 states and 3960 transitions. [2021-12-06 18:07:01,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 98 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:07:01,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 3960 transitions. [2021-12-06 18:07:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 18:07:01,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:07:01,854 INFO L514 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:07:01,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 18:07:02,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:07:02,055 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-12-06 18:07:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:07:02,056 INFO L85 PathProgramCache]: Analyzing trace with hash -387940330, now seen corresponding path program 2 times [2021-12-06 18:07:02,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:07:02,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689047106] [2021-12-06 18:07:02,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:07:02,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:07:02,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:07:02,064 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:07:02,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f20535-5b05-471b-9aed-b55b095b06be/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 18:07:03,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 18:07:03,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:07:03,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 18:07:03,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:07:03,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:07:03,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:07:03,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:07:04,010 INFO L354 Elim1Store]: treesize reduction 124, result has 26.6 percent of original size [2021-12-06 18:07:04,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 131 treesize of output 160