./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 aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:53:33,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:53:33,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:53:33,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:53:33,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:53:33,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:53:33,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:53:33,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:53:33,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:53:33,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:53:33,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:53:33,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:53:33,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:53:33,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:53:33,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:53:33,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:53:33,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:53:33,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:53:33,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:53:33,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:53:33,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:53:33,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:53:33,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:53:33,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:53:33,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:53:33,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:53:33,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:53:33,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:53:33,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:53:33,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:53:33,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:53:33,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:53:33,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:53:33,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:53:33,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:53:33,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:53:33,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:53:33,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:53:33,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:53:33,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:53:33,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:53:33,683 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 02:53:33,742 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:53:33,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:53:33,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:53:33,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:53:33,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:53:33,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:53:33,744 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:53:33,745 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:53:33,745 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:53:33,745 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:53:33,746 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:53:33,746 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:53:33,746 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:53:33,746 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:53:33,747 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:53:33,747 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:53:33,747 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:53:33,747 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:53:33,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:53:33,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:53:33,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:53:33,749 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:53:33,749 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:53:33,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:53:33,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:53:33,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:53:33,750 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:53:33,751 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:53:33,751 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:53:33,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:53:33,751 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:53:33,752 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:53:33,752 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:53:33,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:53:33,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:53:33,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:53:33,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:53:33,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:53:33,754 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:53:33,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:53:33,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:53:33,755 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:53:33,755 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2021-11-23 02:53:34,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:53:34,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:53:34,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:53:34,131 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:53:34,132 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:53:34,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2021-11-23 02:53:34,222 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/data/f7d4510b8/95978f23e91d4e9a8d8b0f044bacbb6d/FLAG293c43c16 [2021-11-23 02:53:35,212 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:53:35,214 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2021-11-23 02:53:35,296 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/data/f7d4510b8/95978f23e91d4e9a8d8b0f044bacbb6d/FLAG293c43c16 [2021-11-23 02:53:35,639 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/data/f7d4510b8/95978f23e91d4e9a8d8b0f044bacbb6d [2021-11-23 02:53:35,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:53:35,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:53:35,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:53:35,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:53:35,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:53:35,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:53:35" (1/1) ... [2021-11-23 02:53:35,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@665adbb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:35, skipping insertion in model container [2021-11-23 02:53:35,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:53:35" (1/1) ... [2021-11-23 02:53:35,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:53:35,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:53:36,750 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_1beac1e9-c5a7-4239-8f2e-def02c10ea99/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2021-11-23 02:53:36,800 WARN L564 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-23 02:53:37,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:53:37,520 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) [2021-11-23 02:53:37,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f17dd8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:37, skipping insertion in model container [2021-11-23 02:53:37,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:53:37,523 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-23 02:53:37,527 INFO L158 Benchmark]: Toolchain (without parser) took 1881.02ms. Allocated memory was 109.1MB in the beginning and 138.4MB in the end (delta: 29.4MB). Free memory was 82.1MB in the beginning and 73.4MB in the end (delta: 8.7MB). Peak memory consumption was 38.9MB. Max. memory is 16.1GB. [2021-11-23 02:53:37,528 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 109.1MB. Free memory is still 85.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:53:37,531 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1877.81ms. Allocated memory was 109.1MB in the beginning and 138.4MB in the end (delta: 29.4MB). Free memory was 81.8MB in the beginning and 73.4MB in the end (delta: 8.3MB). Peak memory consumption was 38.9MB. Max. memory is 16.1GB. [2021-11-23 02:53:37,534 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 109.1MB. Free memory is still 85.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1877.81ms. Allocated memory was 109.1MB in the beginning and 138.4MB in the end (delta: 29.4MB). Free memory was 81.8MB in the beginning and 73.4MB in the end (delta: 8.3MB). Peak memory consumption was 38.9MB. 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_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:53:40,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:53:40,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:53:40,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:53:40,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:53:40,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:53:40,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:53:40,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:53:40,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:53:40,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:53:40,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:53:40,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:53:40,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:53:40,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:53:40,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:53:40,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:53:40,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:53:40,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:53:40,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:53:40,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:53:40,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:53:40,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:53:40,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:53:40,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:53:40,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:53:40,607 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:53:40,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:53:40,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:53:40,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:53:40,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:53:40,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:53:40,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:53:40,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:53:40,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:53:40,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:53:40,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:53:40,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:53:40,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:53:40,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:53:40,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:53:40,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:53:40,632 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 02:53:40,692 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:53:40,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:53:40,694 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:53:40,694 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:53:40,695 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:53:40,696 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:53:40,696 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:53:40,697 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:53:40,697 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:53:40,697 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:53:40,699 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:53:40,699 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:53:40,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:53:40,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:53:40,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:53:40,702 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:53:40,702 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:53:40,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:53:40,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:53:40,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:53:40,704 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:53:40,704 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:53:40,704 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:53:40,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:53:40,705 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:53:40,705 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:53:40,705 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:53:40,706 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:53:40,706 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:53:40,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:53:40,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:53:40,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:53:40,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:53:40,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:53:40,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:53:40,709 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:53:40,710 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:53:40,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:53:40,710 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:53:40,710 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_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2021-11-23 02:53:41,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:53:41,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:53:41,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:53:41,298 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:53:41,299 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:53:41,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2021-11-23 02:53:41,383 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/data/069d94454/e3929af8885a4c259ac0d06335e159dc/FLAGe21bd0f82 [2021-11-23 02:53:42,565 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:53:42,567 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2021-11-23 02:53:42,639 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/data/069d94454/e3929af8885a4c259ac0d06335e159dc/FLAGe21bd0f82 [2021-11-23 02:53:42,981 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/data/069d94454/e3929af8885a4c259ac0d06335e159dc [2021-11-23 02:53:42,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:53:42,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:53:42,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:53:42,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:53:43,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:53:43,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:53:42" (1/1) ... [2021-11-23 02:53:43,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52ac53d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:43, skipping insertion in model container [2021-11-23 02:53:43,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:53:42" (1/1) ... [2021-11-23 02:53:43,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:53:43,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:53:44,367 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_1beac1e9-c5a7-4239-8f2e-def02c10ea99/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2021-11-23 02:53:45,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:53:45,189 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 02:53:45,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:53:45,431 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_1beac1e9-c5a7-4239-8f2e-def02c10ea99/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2021-11-23 02:53:45,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:53:45,901 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:53:46,041 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_1beac1e9-c5a7-4239-8f2e-def02c10ea99/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2021-11-23 02:53:46,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:53:46,559 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:53:46,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:46 WrapperNode [2021-11-23 02:53:46,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:53:46,561 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:53:46,561 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:53:46,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:53:46,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:46" (1/1) ... [2021-11-23 02:53:46,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:46" (1/1) ... [2021-11-23 02:53:46,917 INFO L137 Inliner]: procedures = 142, calls = 2887, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3022 [2021-11-23 02:53:46,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:53:46,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:53:46,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:53:46,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:53:46,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:46" (1/1) ... [2021-11-23 02:53:46,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:46" (1/1) ... [2021-11-23 02:53:46,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:46" (1/1) ... [2021-11-23 02:53:46,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:46" (1/1) ... [2021-11-23 02:53:47,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:46" (1/1) ... [2021-11-23 02:53:47,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:46" (1/1) ... [2021-11-23 02:53:47,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:46" (1/1) ... [2021-11-23 02:53:47,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:53:47,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:53:47,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:53:47,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:53:47,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:46" (1/1) ... [2021-11-23 02:53:47,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:53:47,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:53:47,445 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:53:47,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:53:47,562 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2021-11-23 02:53:47,563 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2021-11-23 02:53:47,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-23 02:53:47,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 02:53:47,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:53:47,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-23 02:53:47,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:53:47,564 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-11-23 02:53:47,564 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-11-23 02:53:47,565 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2021-11-23 02:53:47,565 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2021-11-23 02:53:47,565 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2021-11-23 02:53:47,565 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2021-11-23 02:53:47,565 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2021-11-23 02:53:47,566 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2021-11-23 02:53:47,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-23 02:53:47,566 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-11-23 02:53:47,566 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-11-23 02:53:47,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-23 02:53:47,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-23 02:53:47,567 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2021-11-23 02:53:47,567 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2021-11-23 02:53:47,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-23 02:53:47,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:53:47,568 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:53:47,568 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-11-23 02:53:47,569 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-11-23 02:53:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2021-11-23 02:53:47,570 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2021-11-23 02:53:47,570 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2021-11-23 02:53:47,570 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2021-11-23 02:53:47,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:53:47,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:53:47,571 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2021-11-23 02:53:47,571 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2021-11-23 02:53:47,572 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2021-11-23 02:53:47,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2021-11-23 02:53:47,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:53:47,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:53:47,573 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-11-23 02:53:47,573 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-11-23 02:53:47,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-23 02:53:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-23 02:53:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-23 02:53:47,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:53:47,590 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2021-11-23 02:53:47,591 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2021-11-23 02:53:47,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-23 02:53:47,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-23 02:53:47,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:53:47,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 02:53:47,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-23 02:53:47,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:53:47,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-23 02:53:47,593 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-11-23 02:53:47,594 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-11-23 02:53:47,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2021-11-23 02:53:47,594 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2021-11-23 02:53:47,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-23 02:53:47,595 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2021-11-23 02:53:47,595 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2021-11-23 02:53:47,595 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2021-11-23 02:53:47,595 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2021-11-23 02:53:47,596 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2021-11-23 02:53:47,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2021-11-23 02:53:47,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:53:47,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:53:48,345 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:53:48,348 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:53:48,458 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:48,476 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-11-23 02:53:48,476 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-11-23 02:53:48,486 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:49,232 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2021-11-23 02:53:49,233 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2021-11-23 02:53:49,305 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:49,328 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-11-23 02:53:49,329 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-11-23 02:53:49,343 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:51,581 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:51,607 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:51,670 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2021-11-23 02:53:51,670 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2021-11-23 02:53:51,672 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:51,674 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:51,674 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:52,404 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2021-11-23 02:53:52,405 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2021-11-23 02:53:52,405 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2021-11-23 02:53:52,405 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2021-11-23 02:53:52,405 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2021-11-23 02:53:52,405 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2021-11-23 02:53:52,410 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:52,435 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:52,438 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:57,416 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2021-11-23 02:53:57,416 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2021-11-23 02:53:57,416 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2021-11-23 02:53:57,416 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2021-11-23 02:53:57,417 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2021-11-23 02:53:57,417 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2021-11-23 02:53:57,637 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:57,769 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-11-23 02:53:57,769 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-11-23 02:53:57,783 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:57,784 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:57,786 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:57,790 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:57,791 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:57,797 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:57,799 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:53:57,801 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:54:02,670 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2021-11-23 02:54:02,670 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2021-11-23 02:54:02,670 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2021-11-23 02:54:02,671 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2021-11-23 02:54:02,671 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2021-11-23 02:54:02,671 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2021-11-23 02:54:02,671 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2021-11-23 02:54:02,671 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2021-11-23 02:54:02,672 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2021-11-23 02:54:02,672 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2021-11-23 02:54:02,672 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2021-11-23 02:54:02,672 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2021-11-23 02:54:02,672 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2021-11-23 02:54:02,672 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2021-11-23 02:54:02,673 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2021-11-23 02:54:02,673 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2021-11-23 02:54:02,694 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:54:02,716 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:54:02,716 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 02:54:02,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:54:02 BoogieIcfgContainer [2021-11-23 02:54:02,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:54:02,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:54:02,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:54:02,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:54:02,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:53:42" (1/3) ... [2021-11-23 02:54:02,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b56ef10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:54:02, skipping insertion in model container [2021-11-23 02:54:02,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:46" (2/3) ... [2021-11-23 02:54:02,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b56ef10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:54:02, skipping insertion in model container [2021-11-23 02:54:02,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:54:02" (3/3) ... [2021-11-23 02:54:02,732 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2021-11-23 02:54:02,738 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:54:02,739 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 954 error locations. [2021-11-23 02:54:02,795 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:54:02,803 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 [2021-11-23 02:54:02,803 INFO L340 AbstractCegarLoop]: Starting to check reachability of 954 error locations. [2021-11-23 02:54:02,862 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) [2021-11-23 02:54:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 02:54:02,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:02,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 02:54:02,871 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-11-23 02:54:02,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:02,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1700083, now seen corresponding path program 1 times [2021-11-23 02:54:02,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:54:02,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314747833] [2021-11-23 02:54:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:02,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:54:02,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:54:02,902 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:54:02,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:54:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:04,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:54:04,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:05,096 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-11-23 02:54:05,097 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 [2021-11-23 02:54:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:54:05,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:54:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:54:05,246 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:54:05,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314747833] [2021-11-23 02:54:05,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314747833] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:05,248 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:05,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 02:54:05,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166678072] [2021-11-23 02:54:05,257 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:05,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:54:05,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:54:05,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:54:05,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:05,319 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) [2021-11-23 02:54:10,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:10,239 INFO L93 Difference]: Finished difference Result 2077 states and 2349 transitions. [2021-11-23 02:54:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:54:10,248 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 [2021-11-23 02:54:10,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:10,282 INFO L225 Difference]: With dead ends: 2077 [2021-11-23 02:54:10,282 INFO L226 Difference]: Without dead ends: 2075 [2021-11-23 02:54:10,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:10,288 INFO L933 BasicCegarLoop]: 2312 mSDtfsCounter, 57 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 3657 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:10,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 3657 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-23 02:54:10,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-11-23 02:54:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2075. [2021-11-23 02:54:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 1017 states have (on average 2.1435594886922322) internal successors, (2180), 1991 states have internal predecessors, (2180), 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) [2021-11-23 02:54:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 2347 transitions. [2021-11-23 02:54:10,473 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 2347 transitions. Word has length 3 [2021-11-23 02:54:10,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:10,473 INFO L470 AbstractCegarLoop]: Abstraction has 2075 states and 2347 transitions. [2021-11-23 02:54:10,474 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) [2021-11-23 02:54:10,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 2347 transitions. [2021-11-23 02:54:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 02:54:10,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:10,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 02:54:10,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:54:10,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:54:10,692 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-11-23 02:54:10,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:10,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1700084, now seen corresponding path program 1 times [2021-11-23 02:54:10,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:54:10,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442447731] [2021-11-23 02:54:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:10,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:54:10,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:54:10,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:54:10,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:54:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:12,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:54:12,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:13,067 INFO L354 Elim1Store]: treesize reduction 143, result has 22.7 percent of original size [2021-11-23 02:54:13,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 66 [2021-11-23 02:54:13,084 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 70 treesize of output 68 [2021-11-23 02:54:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:54:13,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:54:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:54:13,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:54:13,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442447731] [2021-11-23 02:54:13,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442447731] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:13,427 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:13,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-23 02:54:13,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106384599] [2021-11-23 02:54:13,428 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:13,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:54:13,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:54:13,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:54:13,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:54:13,431 INFO L87 Difference]: Start difference. First operand 2075 states and 2347 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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) [2021-11-23 02:54:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:24,096 INFO L93 Difference]: Finished difference Result 2074 states and 2346 transitions. [2021-11-23 02:54:24,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:54:24,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 3 [2021-11-23 02:54:24,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:24,116 INFO L225 Difference]: With dead ends: 2074 [2021-11-23 02:54:24,116 INFO L226 Difference]: Without dead ends: 2074 [2021-11-23 02:54:24,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:54:24,119 INFO L933 BasicCegarLoop]: 2343 mSDtfsCounter, 2 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3730 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:24,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3730 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 956 Invalid, 0 Unknown, 4 Unchecked, 10.5s Time] [2021-11-23 02:54:24,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-11-23 02:54:24,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2021-11-23 02:54:24,190 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) [2021-11-23 02:54:24,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 2346 transitions. [2021-11-23 02:54:24,209 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 2346 transitions. Word has length 3 [2021-11-23 02:54:24,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:24,209 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 2346 transitions. [2021-11-23 02:54:24,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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) [2021-11-23 02:54:24,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 2346 transitions. [2021-11-23 02:54:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 02:54:24,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:24,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 02:54:24,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 02:54:24,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:54:24,426 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-11-23 02:54:24,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:24,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1633832821, now seen corresponding path program 1 times [2021-11-23 02:54:24,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:54:24,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114483409] [2021-11-23 02:54:24,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:24,431 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:54:24,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:54:24,433 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:54:24,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:54:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:25,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:54:25,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:54:25,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:54:25,688 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 8 treesize of output 6 [2021-11-23 02:54:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:54:25,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:54:25,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114483409] [2021-11-23 02:54:25,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114483409] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:25,722 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:25,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 02:54:25,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379882458] [2021-11-23 02:54:25,722 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:25,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:54:25,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:54:25,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:54:25,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:54:25,724 INFO L87 Difference]: Start difference. First operand 2074 states and 2346 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:34,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:34,767 INFO L93 Difference]: Finished difference Result 2073 states and 2345 transitions. [2021-11-23 02:54:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:54:34,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 [2021-11-23 02:54:34,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:34,784 INFO L225 Difference]: With dead ends: 2073 [2021-11-23 02:54:34,784 INFO L226 Difference]: Without dead ends: 2073 [2021-11-23 02:54:34,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:54:34,786 INFO L933 BasicCegarLoop]: 2339 mSDtfsCounter, 2155 mSDsluCounter, 2578 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2191 SdHoareTripleChecker+Valid, 4917 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:34,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2191 Valid, 4917 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2021-11-23 02:54:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-11-23 02:54:34,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 2073. [2021-11-23 02:54:34,852 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) [2021-11-23 02:54:34,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 2345 transitions. [2021-11-23 02:54:34,867 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 2345 transitions. Word has length 5 [2021-11-23 02:54:34,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:34,868 INFO L470 AbstractCegarLoop]: Abstraction has 2073 states and 2345 transitions. [2021-11-23 02:54:34,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:34,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 2345 transitions. [2021-11-23 02:54:34,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:54:34,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:34,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:54:34,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:54:35,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:54:35,094 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-11-23 02:54:35,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:35,095 INFO L85 PathProgramCache]: Analyzing trace with hash -890788470, now seen corresponding path program 1 times [2021-11-23 02:54:35,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:54:35,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684287296] [2021-11-23 02:54:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:35,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:54:35,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:54:35,102 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:54:35,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 02:54:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:36,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:54:36,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:36,472 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-11-23 02:54:36,472 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 [2021-11-23 02:54:36,570 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 22 treesize of output 18 [2021-11-23 02:54:36,635 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 34 treesize of output 22 [2021-11-23 02:54:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:54:36,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:54:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:54:36,796 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:54:36,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684287296] [2021-11-23 02:54:36,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684287296] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:36,797 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:36,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 02:54:36,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124913460] [2021-11-23 02:54:36,798 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:36,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:54:36,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:54:36,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:54:36,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:54:36,800 INFO L87 Difference]: Start difference. First operand 2073 states and 2345 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:43,989 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 [] [2021-11-23 02:54:53,883 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 [] [2021-11-23 02:54:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:54,018 INFO L93 Difference]: Finished difference Result 2072 states and 2344 transitions. [2021-11-23 02:54:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:54:54,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 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 [2021-11-23 02:54:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:54,034 INFO L225 Difference]: With dead ends: 2072 [2021-11-23 02:54:54,034 INFO L226 Difference]: Without dead ends: 2072 [2021-11-23 02:54:54,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:54:54,036 INFO L933 BasicCegarLoop]: 2340 mSDtfsCounter, 4 mSDsluCounter, 6821 mSDsCounter, 0 mSdLazyCounter, 4884 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9161 SdHoareTripleChecker+Invalid, 4887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4884 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:54,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 9161 Invalid, 4887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4884 Invalid, 2 Unknown, 0 Unchecked, 17.0s Time] [2021-11-23 02:54:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-11-23 02:54:54,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2021-11-23 02:54:54,097 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) [2021-11-23 02:54:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2344 transitions. [2021-11-23 02:54:54,110 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2344 transitions. Word has length 6 [2021-11-23 02:54:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:54,110 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 2344 transitions. [2021-11-23 02:54:54,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:54,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2344 transitions. [2021-11-23 02:54:54,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:54:54,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:54,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:54:54,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:54:54,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:54:54,339 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-11-23 02:54:54,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:54,339 INFO L85 PathProgramCache]: Analyzing trace with hash -890788469, now seen corresponding path program 1 times [2021-11-23 02:54:54,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:54:54,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372044213] [2021-11-23 02:54:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:54,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:54:54,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:54:54,345 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:54:54,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 02:54:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:55,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:54:55,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:55,548 INFO L354 Elim1Store]: treesize reduction 130, result has 29.7 percent of original size [2021-11-23 02:54:55,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 10 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 [2021-11-23 02:54:55,661 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 28 treesize of output 24 [2021-11-23 02:54:55,683 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 [2021-11-23 02:54:55,779 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 54 treesize of output 36 [2021-11-23 02:54:55,786 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 33 treesize of output 21 [2021-11-23 02:54:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:54:55,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:54:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:54:56,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:54:56,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372044213] [2021-11-23 02:54:56,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372044213] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:56,046 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:56,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-23 02:54:56,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722555201] [2021-11-23 02:54:56,047 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:56,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:54:56,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:54:56,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:54:56,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:54:56,049 INFO L87 Difference]: Start difference. First operand 2072 states and 2344 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:07,512 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 [] [2021-11-23 02:55:26,615 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 [] [2021-11-23 02:55:26,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:26,927 INFO L93 Difference]: Finished difference Result 2071 states and 2343 transitions. [2021-11-23 02:55:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:55:26,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2021-11-23 02:55:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:26,942 INFO L225 Difference]: With dead ends: 2071 [2021-11-23 02:55:26,942 INFO L226 Difference]: Without dead ends: 2071 [2021-11-23 02:55:26,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:55:26,943 INFO L933 BasicCegarLoop]: 2340 mSDtfsCounter, 2 mSDsluCounter, 8311 mSDsCounter, 0 mSdLazyCounter, 5732 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10651 SdHoareTripleChecker+Invalid, 5735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5732 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:26,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 10651 Invalid, 5735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5732 Invalid, 2 Unknown, 0 Unchecked, 30.6s Time] [2021-11-23 02:55:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-11-23 02:55:26,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 2071. [2021-11-23 02:55:26,996 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) [2021-11-23 02:55:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2343 transitions. [2021-11-23 02:55:27,007 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2343 transitions. Word has length 6 [2021-11-23 02:55:27,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:27,008 INFO L470 AbstractCegarLoop]: Abstraction has 2071 states and 2343 transitions. [2021-11-23 02:55:27,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:27,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2343 transitions. [2021-11-23 02:55:27,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 02:55:27,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:27,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:27,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:55:27,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:55:27,238 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-11-23 02:55:27,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:27,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1867291348, now seen corresponding path program 1 times [2021-11-23 02:55:27,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:55:27,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952238287] [2021-11-23 02:55:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:27,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:55:27,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:55:27,246 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:55:27,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 02:55:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:28,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:55:28,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:28,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:28,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:55:28,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952238287] [2021-11-23 02:55:28,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952238287] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:28,648 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:28,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 02:55:28,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318414839] [2021-11-23 02:55:28,649 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:28,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:55:28,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:55:28,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:55:28,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:55:28,650 INFO L87 Difference]: Start difference. First operand 2071 states and 2343 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-11-23 02:55:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:28,812 INFO L93 Difference]: Finished difference Result 2081 states and 2355 transitions. [2021-11-23 02:55:28,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:55:28,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 13 [2021-11-23 02:55:28,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:28,828 INFO L225 Difference]: With dead ends: 2081 [2021-11-23 02:55:28,828 INFO L226 Difference]: Without dead ends: 2079 [2021-11-23 02:55:28,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:55:28,829 INFO L933 BasicCegarLoop]: 2340 mSDtfsCounter, 9 mSDsluCounter, 4674 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 7014 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:28,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 7014 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:55:28,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2021-11-23 02:55:28,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 2079. [2021-11-23 02:55:28,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 1023 states have (on average 2.1358748778103616) internal successors, (2185), 1994 states have internal predecessors, (2185), 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) [2021-11-23 02:55:28,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 2352 transitions. [2021-11-23 02:55:28,899 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 2352 transitions. Word has length 13 [2021-11-23 02:55:28,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:28,900 INFO L470 AbstractCegarLoop]: Abstraction has 2079 states and 2352 transitions. [2021-11-23 02:55:28,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-11-23 02:55:28,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 2352 transitions. [2021-11-23 02:55:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:55:28,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:28,902 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:28,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:55:29,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:55:29,118 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-11-23 02:55:29,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:29,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1172495084, now seen corresponding path program 1 times [2021-11-23 02:55:29,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:55:29,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059691225] [2021-11-23 02:55:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:29,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:55:29,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:55:29,121 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:55:29,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 02:55:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:30,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:55:30,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:30,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:30,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:55:30,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059691225] [2021-11-23 02:55:30,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059691225] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:55:30,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [917381407] [2021-11-23 02:55:30,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:30,411 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:55:30,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:55:30,415 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:55:30,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 02:55:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:31,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:55:31,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:31,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:32,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [917381407] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:55:32,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756939532] [2021-11-23 02:55:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:32,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:55:32,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:32,058 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:55:32,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:55:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:33,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:55:33,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:33,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:33,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756939532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:55:33,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:55:33,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2021-11-23 02:55:33,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385347983] [2021-11-23 02:55:33,535 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:55:33,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:55:33,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:55:33,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:55:33,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:55:33,536 INFO L87 Difference]: Start difference. First operand 2079 states and 2352 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:55:34,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:34,177 INFO L93 Difference]: Finished difference Result 2093 states and 2368 transitions. [2021-11-23 02:55:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 02:55:34,178 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 15 [2021-11-23 02:55:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:34,189 INFO L225 Difference]: With dead ends: 2093 [2021-11-23 02:55:34,190 INFO L226 Difference]: Without dead ends: 2085 [2021-11-23 02:55:34,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-23 02:55:34,191 INFO L933 BasicCegarLoop]: 2340 mSDtfsCounter, 29 mSDsluCounter, 9346 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 11686 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:34,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 11686 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:55:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-11-23 02:55:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 2085. [2021-11-23 02:55:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 1029 states have (on average 2.128279883381924) internal successors, (2190), 2000 states have internal predecessors, (2190), 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) [2021-11-23 02:55:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 2357 transitions. [2021-11-23 02:55:34,248 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 2357 transitions. Word has length 15 [2021-11-23 02:55:34,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:34,248 INFO L470 AbstractCegarLoop]: Abstraction has 2085 states and 2357 transitions. [2021-11-23 02:55:34,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:55:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 2357 transitions. [2021-11-23 02:55:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:55:34,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:34,250 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:34,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:55:34,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:55:34,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-23 02:55:34,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:55:34,878 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-11-23 02:55:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:34,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1846179436, now seen corresponding path program 2 times [2021-11-23 02:55:34,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:55:34,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126595457] [2021-11-23 02:55:34,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:55:34,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:55:34,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:55:34,881 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:55:34,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 02:55:37,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 02:55:37,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:55:37,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:55:37,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:37,296 INFO L354 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2021-11-23 02:55:37,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 81 [2021-11-23 02:55:49,540 INFO L354 Elim1Store]: treesize reduction 135, result has 23.3 percent of original size [2021-11-23 02:55:49,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 85 treesize of output 114 [2021-11-23 02:55:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:55:50,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:55:50,837 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:55:50,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126595457] [2021-11-23 02:55:50,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126595457] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:50,838 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:50,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 2] imperfect sequences [] total 5 [2021-11-23 02:55:50,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891046934] [2021-11-23 02:55:50,839 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:50,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:55:50,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:55:50,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:55:50,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=15, Unknown=2, NotChecked=0, Total=30 [2021-11-23 02:55:50,841 INFO L87 Difference]: Start difference. First operand 2085 states and 2357 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:55:55,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:55,125 INFO L93 Difference]: Finished difference Result 2084 states and 2356 transitions. [2021-11-23 02:55:55,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:55:55,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-11-23 02:55:55,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:55,137 INFO L225 Difference]: With dead ends: 2084 [2021-11-23 02:55:55,137 INFO L226 Difference]: Without dead ends: 2084 [2021-11-23 02:55:55,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=13, Invalid=15, Unknown=2, NotChecked=0, Total=30 [2021-11-23 02:55:55,139 INFO L933 BasicCegarLoop]: 2335 mSDtfsCounter, 0 mSDsluCounter, 2728 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5063 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 977 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:55,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 5063 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 969 Invalid, 0 Unknown, 977 Unchecked, 4.2s Time] [2021-11-23 02:55:55,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-11-23 02:55:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 2084. [2021-11-23 02:55:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 1029 states have (on average 2.127308066083576) internal successors, (2189), 1999 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) [2021-11-23 02:55:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 2356 transitions. [2021-11-23 02:55:55,191 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 2356 transitions. Word has length 19 [2021-11-23 02:55:55,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:55,192 INFO L470 AbstractCegarLoop]: Abstraction has 2084 states and 2356 transitions. [2021-11-23 02:55:55,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:55:55,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 2356 transitions. [2021-11-23 02:55:55,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:55:55,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:55,193 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:55,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-23 02:55:55,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:55:55,410 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-11-23 02:55:55,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:55,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1846179435, now seen corresponding path program 1 times [2021-11-23 02:55:55,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:55:55,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988780636] [2021-11-23 02:55:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:55,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:55:55,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:55:55,413 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:55:55,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 02:55:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:56,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 1275 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:55:56,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:56,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:57,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:55:57,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988780636] [2021-11-23 02:55:57,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988780636] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:55:57,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1669052642] [2021-11-23 02:55:57,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:57,242 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:55:57,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:55:57,243 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:55:57,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 02:55:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:58,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 1275 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:55:58,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:59,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:59,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1669052642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:55:59,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480724650] [2021-11-23 02:55:59,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:59,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:55:59,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:59,225 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:55:59,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:56:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:00,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 1275 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:56:00,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:00,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:01,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480724650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:01,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:56:01,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 26 [2021-11-23 02:56:01,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097707035] [2021-11-23 02:56:01,424 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:56:01,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 02:56:01,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:01,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 02:56:01,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-11-23 02:56:01,427 INFO L87 Difference]: Start difference. First operand 2084 states and 2356 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), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:56:03,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:03,518 INFO L93 Difference]: Finished difference Result 2108 states and 2386 transitions. [2021-11-23 02:56:03,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 02:56:03,518 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), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2021-11-23 02:56:03,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:03,528 INFO L225 Difference]: With dead ends: 2108 [2021-11-23 02:56:03,528 INFO L226 Difference]: Without dead ends: 2096 [2021-11-23 02:56:03,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=654, Invalid=1238, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 02:56:03,530 INFO L933 BasicCegarLoop]: 2341 mSDtfsCounter, 68 mSDsluCounter, 21037 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 23378 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:03,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 23378 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:56:03,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2021-11-23 02:56:03,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2096. [2021-11-23 02:56:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 1041 states have (on average 2.1143131604226704) internal successors, (2201), 2011 states have internal predecessors, (2201), 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) [2021-11-23 02:56:03,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 2368 transitions. [2021-11-23 02:56:03,575 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 2368 transitions. Word has length 19 [2021-11-23 02:56:03,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:03,576 INFO L470 AbstractCegarLoop]: Abstraction has 2096 states and 2368 transitions. [2021-11-23 02:56:03,576 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), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:56:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 2368 transitions. [2021-11-23 02:56:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 02:56:03,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:03,577 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:03,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:03,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-23 02:56:04,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-23 02:56:04,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:56:04,185 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-11-23 02:56:04,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:04,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1552706923, now seen corresponding path program 2 times [2021-11-23 02:56:04,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:04,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184340572] [2021-11-23 02:56:04,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:56:04,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:04,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:04,188 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:04,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 02:56:07,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 02:56:07,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:56:07,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:56:07,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:08,057 INFO L354 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2021-11-23 02:56:08,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 81 [2021-11-23 02:56:08,070 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:56:08,071 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 87 treesize of output 81 [2021-11-23 02:56:34,855 INFO L354 Elim1Store]: treesize reduction 110, result has 37.5 percent of original size [2021-11-23 02:56:34,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 119 [2021-11-23 02:56:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 02:56:47,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 02:56:47,636 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:47,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184340572] [2021-11-23 02:56:47,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184340572] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:56:47,637 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:56:47,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 6 [2021-11-23 02:56:47,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731517653] [2021-11-23 02:56:47,637 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:47,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:56:47,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:47,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:56:47,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:56:47,638 INFO L87 Difference]: Start difference. First operand 2096 states and 2368 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:56:47,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:47,677 INFO L93 Difference]: Finished difference Result 2095 states and 2367 transitions. [2021-11-23 02:56:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:56:47,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-23 02:56:47,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:47,688 INFO L225 Difference]: With dead ends: 2095 [2021-11-23 02:56:47,689 INFO L226 Difference]: Without dead ends: 2095 [2021-11-23 02:56:47,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:56:47,690 INFO L933 BasicCegarLoop]: 2335 mSDtfsCounter, 2 mSDsluCounter, 6911 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9246 SdHoareTripleChecker+Invalid, 1910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1910 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:47,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 9246 Invalid, 1910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 1910 Unchecked, 0.0s Time] [2021-11-23 02:56:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-11-23 02:56:47,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 2095. [2021-11-23 02:56:47,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2095 states, 1041 states have (on average 2.1133525456292026) internal successors, (2200), 2010 states have internal predecessors, (2200), 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) [2021-11-23 02:56:47,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2095 states to 2095 states and 2367 transitions. [2021-11-23 02:56:47,731 INFO L78 Accepts]: Start accepts. Automaton has 2095 states and 2367 transitions. Word has length 27 [2021-11-23 02:56:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:47,732 INFO L470 AbstractCegarLoop]: Abstraction has 2095 states and 2367 transitions. [2021-11-23 02:56:47,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:56:47,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2095 states and 2367 transitions. [2021-11-23 02:56:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 02:56:47,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:47,733 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:47,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:47,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:56:47,959 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-11-23 02:56:47,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:47,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1797648843, now seen corresponding path program 1 times [2021-11-23 02:56:47,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:47,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302905647] [2021-11-23 02:56:47,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:47,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:47,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:47,962 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:47,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 02:56:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:48,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1323 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:56:48,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:49,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:50,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:50,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302905647] [2021-11-23 02:56:50,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302905647] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:50,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [980994741] [2021-11-23 02:56:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:50,820 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:56:50,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:56:50,821 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:56:50,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 02:56:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:52,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 1323 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:56:52,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:52,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:53,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [980994741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:53,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001050302] [2021-11-23 02:56:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:53,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:56:53,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:56:53,201 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:56:53,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 02:56:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:54,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1323 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:56:54,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:54,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:57,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001050302] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:57,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:56:57,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 50 [2021-11-23 02:56:57,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919242757] [2021-11-23 02:56:57,218 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:56:57,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-23 02:56:57,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:57,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-23 02:56:57,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=1693, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 02:56:57,222 INFO L87 Difference]: Start difference. First operand 2095 states and 2367 transitions. Second operand has 50 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:57:05,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:05,343 INFO L93 Difference]: Finished difference Result 2139 states and 2425 transitions. [2021-11-23 02:57:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-23 02:57:05,344 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-11-23 02:57:05,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:05,355 INFO L225 Difference]: With dead ends: 2139 [2021-11-23 02:57:05,356 INFO L226 Difference]: Without dead ends: 2119 [2021-11-23 02:57:05,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=2526, Invalid=5130, Unknown=0, NotChecked=0, Total=7656 [2021-11-23 02:57:05,359 INFO L933 BasicCegarLoop]: 2344 mSDtfsCounter, 225 mSDsluCounter, 37453 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 39797 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:05,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 39797 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 02:57:05,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-11-23 02:57:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 2119. [2021-11-23 02:57:05,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 1065 states have (on average 2.088262910798122) internal successors, (2224), 2034 states have internal predecessors, (2224), 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) [2021-11-23 02:57:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 2391 transitions. [2021-11-23 02:57:05,407 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 2391 transitions. Word has length 29 [2021-11-23 02:57:05,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:05,407 INFO L470 AbstractCegarLoop]: Abstraction has 2119 states and 2391 transitions. [2021-11-23 02:57:05,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:57:05,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 2391 transitions. [2021-11-23 02:57:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 02:57:05,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:05,409 INFO L514 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:05,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:05,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-23 02:57:05,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-23 02:57:06,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:57:06,026 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-11-23 02:57:06,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:06,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1452187701, now seen corresponding path program 2 times [2021-11-23 02:57:06,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:57:06,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941737021] [2021-11-23 02:57:06,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:57:06,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:57:06,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:57:06,030 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:57:06,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 02:57:08,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 02:57:08,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:57:08,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:57:08,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:08,863 INFO L354 Elim1Store]: treesize reduction 345, result has 15.0 percent of original size [2021-11-23 02:57:08,864 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 101 treesize of output 136 [2021-11-23 02:57:29,167 INFO L354 Elim1Store]: treesize reduction 186, result has 20.9 percent of original size [2021-11-23 02:57:29,167 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 21 case distinctions, treesize of input 128 treesize of output 163 [2021-11-23 02:57:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-11-23 02:57:30,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-11-23 02:57:33,521 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:33,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941737021] [2021-11-23 02:57:33,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941737021] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:57:33,521 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:57:33,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 5 [2021-11-23 02:57:33,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114820027] [2021-11-23 02:57:33,522 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:57:33,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:57:33,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:57:33,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:57:33,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=14, Unknown=1, NotChecked=0, Total=30 [2021-11-23 02:57:33,524 INFO L87 Difference]: Start difference. First operand 2119 states and 2391 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:57:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:33,654 INFO L93 Difference]: Finished difference Result 2118 states and 2390 transitions. [2021-11-23 02:57:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:57:33,656 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-23 02:57:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:33,669 INFO L225 Difference]: With dead ends: 2118 [2021-11-23 02:57:33,669 INFO L226 Difference]: Without dead ends: 2118 [2021-11-23 02:57:33,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=15, Invalid=14, Unknown=1, NotChecked=0, Total=30 [2021-11-23 02:57:33,670 INFO L933 BasicCegarLoop]: 2332 mSDtfsCounter, 12 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3689 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 981 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:33,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3689 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 981 Unchecked, 0.1s Time] [2021-11-23 02:57:33,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-11-23 02:57:33,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 2118. [2021-11-23 02:57:33,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 1065 states have (on average 2.0873239436619717) internal successors, (2223), 2033 states have internal predecessors, (2223), 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) [2021-11-23 02:57:33,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 2390 transitions. [2021-11-23 02:57:33,720 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 2390 transitions. Word has length 45 [2021-11-23 02:57:33,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:33,721 INFO L470 AbstractCegarLoop]: Abstraction has 2118 states and 2390 transitions. [2021-11-23 02:57:33,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:57:33,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 2390 transitions. [2021-11-23 02:57:33,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 02:57:33,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:33,723 INFO L514 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:33,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-23 02:57:33,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:57:33,950 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-11-23 02:57:33,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:33,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1452187702, now seen corresponding path program 1 times [2021-11-23 02:57:33,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:57:33,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90555911] [2021-11-23 02:57:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:33,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:57:33,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:57:33,955 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:57:33,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 02:57:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:35,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 02:57:35,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:36,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:42,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:42,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90555911] [2021-11-23 02:57:42,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90555911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:42,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [635583456] [2021-11-23 02:57:42,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:42,215 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:57:42,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:57:42,215 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:57:42,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 02:57:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:43,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 02:57:43,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:44,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:44,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [635583456] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:44,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721573598] [2021-11-23 02:57:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:44,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:57:44,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:57:44,929 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:57:44,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 02:57:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:46,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 02:57:46,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:46,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:54,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721573598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:54,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:57:54,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34, 34, 34, 34] total 98 [2021-11-23 02:57:54,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637352907] [2021-11-23 02:57:54,995 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:57:54,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-23 02:57:54,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:57:54,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-23 02:57:54,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2797, Invalid=6709, Unknown=0, NotChecked=0, Total=9506 [2021-11-23 02:57:54,999 INFO L87 Difference]: Start difference. First operand 2118 states and 2390 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), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:58:33,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:58:33,780 INFO L93 Difference]: Finished difference Result 2202 states and 2504 transitions. [2021-11-23 02:58:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-23 02:58:33,781 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), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-23 02:58:33,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:58:33,791 INFO L225 Difference]: With dead ends: 2202 [2021-11-23 02:58:33,791 INFO L226 Difference]: Without dead ends: 2166 [2021-11-23 02:58:33,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=9918, Invalid=20882, Unknown=0, NotChecked=0, Total=30800 [2021-11-23 02:58:33,802 INFO L933 BasicCegarLoop]: 2351 mSDtfsCounter, 609 mSDsluCounter, 77450 mSDsCounter, 0 mSdLazyCounter, 2900 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 79801 SdHoareTripleChecker+Invalid, 3560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 2900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:58:33,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 79801 Invalid, 3560 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [660 Valid, 2900 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-11-23 02:58:33,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2021-11-23 02:58:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2166. [2021-11-23 02:58:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 1113 states have (on average 2.0404312668463613) internal successors, (2271), 2081 states have internal predecessors, (2271), 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) [2021-11-23 02:58:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 2438 transitions. [2021-11-23 02:58:33,846 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 2438 transitions. Word has length 45 [2021-11-23 02:58:33,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:58:33,847 INFO L470 AbstractCegarLoop]: Abstraction has 2166 states and 2438 transitions. [2021-11-23 02:58:33,848 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), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:58:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 2438 transitions. [2021-11-23 02:58:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 02:58:33,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:33,850 INFO L514 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:33,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:34,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:34,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:34,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:58:34,474 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATION, FloppyProcessQueuedRequestsErr2REQUIRES_VIOLATION (and 951 more)] === [2021-11-23 02:58:34,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash 197903414, now seen corresponding path program 2 times [2021-11-23 02:58:34,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:58:34,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882853834] [2021-11-23 02:58:34,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:58:34,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:58:34,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:58:34,478 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:58:34,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1beac1e9-c5a7-4239-8f2e-def02c10ea99/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 02:58:38,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 02:58:38,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:58:38,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 02:58:38,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:58:38,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:38,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:38,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:38,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:41,397 INFO L354 Elim1Store]: treesize reduction 1761, result has 13.1 percent of original size [2021-11-23 02:58:41,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 18 select indices, 18 select index equivalence classes, 95 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 82 case distinctions, treesize of input 232 treesize of output 452 [2021-11-23 02:58:41,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:41,726 INFO L354 Elim1Store]: treesize reduction 230, result has 13.9 percent of original size [2021-11-23 02:58:41,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 430 [2021-11-23 02:58:47,692 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 86 treesize of output 82 [2021-11-23 02:58:58,103 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 357 treesize of output 249