./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 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:41:44,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:41:44,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:41:44,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:41:44,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:41:44,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:41:44,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:41:44,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:41:44,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:41:44,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:41:44,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:41:44,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:41:44,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:41:44,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:41:44,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:41:44,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:41:44,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:41:44,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:41:44,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:41:44,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:41:44,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:41:44,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:41:44,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:41:44,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:41:44,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:41:44,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:41:44,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:41:44,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:41:44,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:41:44,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:41:44,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:41:44,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:41:44,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:41:44,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:41:44,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:41:44,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:41:44,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:41:44,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:41:44,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:41:44,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:41:44,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:41:44,712 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 20:41:44,735 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:41:44,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:41:44,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:41:44,737 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:41:44,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:41:44,738 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:41:44,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:41:44,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:41:44,739 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:41:44,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:41:44,740 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:41:44,740 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:41:44,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:41:44,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:41:44,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:41:44,741 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:41:44,741 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:41:44,742 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:41:44,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:41:44,742 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:41:44,742 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:41:44,743 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:41:44,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:41:44,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:41:44,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:41:44,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:41:44,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:41:44,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:41:44,745 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:41:44,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:41:44,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2022-11-18 20:41:45,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:41:45,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:41:45,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:41:45,099 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:41:45,122 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:41:45,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-11-18 20:41:45,227 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/data/585baa75a/d61b60179b3a4abd9243ef4ea17dfecd/FLAG10e4abb29 [2022-11-18 20:41:46,186 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:41:46,186 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-11-18 20:41:46,231 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/data/585baa75a/d61b60179b3a4abd9243ef4ea17dfecd/FLAG10e4abb29 [2022-11-18 20:41:46,699 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/data/585baa75a/d61b60179b3a4abd9243ef4ea17dfecd [2022-11-18 20:41:46,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:41:46,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:41:46,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:41:46,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:41:46,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:41:46,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:41:46" (1/1) ... [2022-11-18 20:41:46,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@100c0dad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:46, skipping insertion in model container [2022-11-18 20:41:46,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:41:46" (1/1) ... [2022-11-18 20:41:46,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:41:46,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:41:48,024 WARN L234 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_540e6893-2cc8-4984-94ee-817618fa909c/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-11-18 20:41:48,115 WARN L569 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2022-11-18 20:41:48,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:41:48,664 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-18 20:41:48,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3c9635f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:48, skipping insertion in model container [2022-11-18 20:41:48,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:41:48,665 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-18 20:41:48,667 INFO L158 Benchmark]: Toolchain (without parser) took 1958.94ms. Allocated memory is still 132.1MB. Free memory was 90.0MB in the beginning and 81.3MB in the end (delta: 8.7MB). Peak memory consumption was 39.2MB. Max. memory is 16.1GB. [2022-11-18 20:41:48,668 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 88.1MB. Free memory was 62.7MB in the beginning and 62.7MB in the end (delta: 30.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:41:48,669 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1953.88ms. Allocated memory is still 132.1MB. Free memory was 89.7MB in the beginning and 81.3MB in the end (delta: 8.4MB). Peak memory consumption was 39.2MB. Max. memory is 16.1GB. [2022-11-18 20:41:48,671 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 88.1MB. Free memory was 62.7MB in the beginning and 62.7MB in the end (delta: 30.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1953.88ms. Allocated memory is still 132.1MB. Free memory was 89.7MB in the beginning and 81.3MB in the end (delta: 8.4MB). Peak memory consumption was 39.2MB. 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 of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:41:50,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:41:50,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:41:50,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:41:50,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:41:50,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:41:50,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:41:50,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:41:50,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:41:50,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:41:50,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:41:50,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:41:50,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:41:50,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:41:50,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:41:50,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:41:50,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:41:50,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:41:50,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:41:50,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:41:50,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:41:50,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:41:50,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:41:50,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:41:50,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:41:50,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:41:50,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:41:50,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:41:50,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:41:50,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:41:50,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:41:50,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:41:50,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:41:50,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:41:50,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:41:50,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:41:50,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:41:50,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:41:50,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:41:50,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:41:50,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:41:50,968 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-18 20:41:51,010 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:41:51,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:41:51,011 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:41:51,011 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:41:51,012 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:41:51,012 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:41:51,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:41:51,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:41:51,014 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:41:51,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:41:51,014 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:41:51,014 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:41:51,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:41:51,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:41:51,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:41:51,015 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:41:51,015 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:41:51,016 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:41:51,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:41:51,016 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:41:51,016 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-18 20:41:51,016 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-18 20:41:51,017 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:41:51,017 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:41:51,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:41:51,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:41:51,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:41:51,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:41:51,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:41:51,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:41:51,018 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-18 20:41:51,019 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-18 20:41:51,019 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-18 20:41:51,019 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_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2022-11-18 20:41:51,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:41:51,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:41:51,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:41:51,428 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:41:51,429 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:41:51,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-11-18 20:41:51,499 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/data/5fb57714b/6f705d9aef5045be8363fe2d018f2c02/FLAG714f43207 [2022-11-18 20:41:52,412 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:41:52,412 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-11-18 20:41:52,453 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/data/5fb57714b/6f705d9aef5045be8363fe2d018f2c02/FLAG714f43207 [2022-11-18 20:41:52,877 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/data/5fb57714b/6f705d9aef5045be8363fe2d018f2c02 [2022-11-18 20:41:52,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:41:52,883 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:41:52,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:41:52,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:41:52,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:41:52,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:41:52" (1/1) ... [2022-11-18 20:41:52,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@220edf2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:52, skipping insertion in model container [2022-11-18 20:41:52,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:41:52" (1/1) ... [2022-11-18 20:41:52,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:41:53,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:41:53,785 WARN L234 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_540e6893-2cc8-4984-94ee-817618fa909c/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-11-18 20:41:54,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:41:54,355 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-18 20:41:54,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:41:54,510 WARN L234 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_540e6893-2cc8-4984-94ee-817618fa909c/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-11-18 20:41:54,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:41:54,909 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:41:54,979 WARN L234 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_540e6893-2cc8-4984-94ee-817618fa909c/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-11-18 20:41:55,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:41:55,355 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:41:55,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55 WrapperNode [2022-11-18 20:41:55,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:41:55,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:41:55,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:41:55,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:41:55,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,557 INFO L138 Inliner]: procedures = 142, calls = 2895, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3030 [2022-11-18 20:41:55,560 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:41:55,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:41:55,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:41:55,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:41:55,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,825 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:41:55,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:41:55,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:41:55,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:41:55,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:41:55,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:41:55,887 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:41:55,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:41:55,939 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2022-11-18 20:41:55,939 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2022-11-18 20:41:55,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-18 20:41:55,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-18 20:41:55,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-18 20:41:55,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-11-18 20:41:55,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-18 20:41:55,940 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-11-18 20:41:55,941 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-11-18 20:41:55,941 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-11-18 20:41:55,941 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-11-18 20:41:55,941 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-11-18 20:41:55,941 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-11-18 20:41:55,941 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-11-18 20:41:55,942 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-11-18 20:41:55,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-11-18 20:41:55,942 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-11-18 20:41:55,942 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-11-18 20:41:55,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2022-11-18 20:41:55,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-11-18 20:41:55,943 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2022-11-18 20:41:55,943 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2022-11-18 20:41:55,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2022-11-18 20:41:55,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-18 20:41:55,943 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-18 20:41:55,943 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-11-18 20:41:55,944 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-11-18 20:41:55,944 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-11-18 20:41:55,944 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-11-18 20:41:55,944 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-11-18 20:41:55,944 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-11-18 20:41:55,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:41:55,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:41:55,945 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-11-18 20:41:55,945 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-11-18 20:41:55,945 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2022-11-18 20:41:55,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2022-11-18 20:41:55,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:41:55,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 20:41:55,946 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-11-18 20:41:55,946 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-11-18 20:41:55,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2022-11-18 20:41:55,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2022-11-18 20:41:55,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-11-18 20:41:55,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 20:41:55,947 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-11-18 20:41:55,947 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-11-18 20:41:55,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-18 20:41:55,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-11-18 20:41:55,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:41:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-18 20:41:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-11-18 20:41:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-18 20:41:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-18 20:41:55,952 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-11-18 20:41:55,952 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-11-18 20:41:55,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-11-18 20:41:55,952 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-11-18 20:41:55,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-11-18 20:41:55,953 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2022-11-18 20:41:55,953 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2022-11-18 20:41:55,953 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-11-18 20:41:55,954 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-11-18 20:41:55,954 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-11-18 20:41:55,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-11-18 20:41:55,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:41:55,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:41:56,738 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:41:56,740 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:41:56,814 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:41:56,841 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-11-18 20:41:56,842 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-11-18 20:41:56,848 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:41:57,529 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-11-18 20:41:57,530 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-11-18 20:41:57,632 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:41:57,660 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-11-18 20:41:57,660 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-11-18 20:41:57,669 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:41:59,922 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:41:59,944 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:41:59,992 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-11-18 20:41:59,992 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-11-18 20:41:59,995 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:41:59,996 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:41:59,997 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:42:00,426 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-11-18 20:42:00,426 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-11-18 20:42:00,426 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-11-18 20:42:00,426 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-11-18 20:42:00,426 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-11-18 20:42:00,427 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-11-18 20:42:00,433 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:42:00,449 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:42:00,452 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:42:05,071 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-11-18 20:42:05,071 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-11-18 20:42:05,071 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-11-18 20:42:05,072 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-11-18 20:42:05,072 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2022-11-18 20:42:05,072 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2022-11-18 20:42:05,254 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:42:05,416 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-11-18 20:42:05,417 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-11-18 20:42:05,429 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:42:05,435 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:42:05,442 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:42:05,451 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:42:05,452 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:42:05,460 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:42:05,462 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:42:05,465 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-18 20:42:10,374 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2022-11-18 20:42:10,374 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2022-11-18 20:42:10,375 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2022-11-18 20:42:10,375 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2022-11-18 20:42:10,375 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2022-11-18 20:42:10,375 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2022-11-18 20:42:10,375 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2022-11-18 20:42:10,375 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2022-11-18 20:42:10,375 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2022-11-18 20:42:10,375 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2022-11-18 20:42:10,376 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2022-11-18 20:42:10,376 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2022-11-18 20:42:10,376 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2022-11-18 20:42:10,376 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2022-11-18 20:42:10,376 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2022-11-18 20:42:10,376 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2022-11-18 20:42:10,397 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:42:10,415 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:42:10,416 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 20:42:10,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:42:10 BoogieIcfgContainer [2022-11-18 20:42:10,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:42:10,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:42:10,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:42:10,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:42:10,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:41:52" (1/3) ... [2022-11-18 20:42:10,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613a1471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:42:10, skipping insertion in model container [2022-11-18 20:42:10,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (2/3) ... [2022-11-18 20:42:10,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613a1471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:42:10, skipping insertion in model container [2022-11-18 20:42:10,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:42:10" (3/3) ... [2022-11-18 20:42:10,428 INFO L112 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2022-11-18 20:42:10,447 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:42:10,448 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 954 error locations. [2022-11-18 20:42:10,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:42:10,520 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@45a69e55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:42:10,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 954 error locations. [2022-11-18 20:42:10,530 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) [2022-11-18 20:42:10,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 20:42:10,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:42:10,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 20:42:10,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:42:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:10,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1700083, now seen corresponding path program 1 times [2022-11-18 20:42:10,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:42:10,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744510242] [2022-11-18 20:42:10,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:10,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:10,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:42:10,567 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:42:10,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-18 20:42:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:12,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 1234 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:42:12,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:12,735 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-18 20:42:12,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 36 [2022-11-18 20:42:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:12,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:42:12,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:42:12,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744510242] [2022-11-18 20:42:12,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744510242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:42:12,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:42:12,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:42:12,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328098501] [2022-11-18 20:42:12,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:42:12,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:42:12,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:42:12,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:42:12,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:42:12,861 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) [2022-11-18 20:42:17,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:42:17,463 INFO L93 Difference]: Finished difference Result 2077 states and 2349 transitions. [2022-11-18 20:42:17,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:42:17,465 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 [2022-11-18 20:42:17,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:42:17,488 INFO L225 Difference]: With dead ends: 2077 [2022-11-18 20:42:17,488 INFO L226 Difference]: Without dead ends: 2075 [2022-11-18 20:42:17,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:42:17,492 INFO L413 NwaCegarLoop]: 2312 mSDtfsCounter, 57 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 3654 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:42:17,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 3654 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-18 20:42:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2022-11-18 20:42:17,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2075. [2022-11-18 20:42:17,615 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) [2022-11-18 20:42:17,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 2347 transitions. [2022-11-18 20:42:17,633 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 2347 transitions. Word has length 3 [2022-11-18 20:42:17,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:42:17,634 INFO L495 AbstractCegarLoop]: Abstraction has 2075 states and 2347 transitions. [2022-11-18 20:42:17,634 INFO L496 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) [2022-11-18 20:42:17,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 2347 transitions. [2022-11-18 20:42:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 20:42:17,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:42:17,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 20:42:17,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:42:17,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:17,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:42:17,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:17,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1700084, now seen corresponding path program 1 times [2022-11-18 20:42:17,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:42:17,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111465392] [2022-11-18 20:42:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:17,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:17,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:42:17,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:42:17,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-18 20:42:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:19,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1234 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:42:19,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:19,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:42:19,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:42:19,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:42:19,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:42:20,073 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-18 20:42:20,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-18 20:42:20,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-18 20:42:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:20,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:42:20,136 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:42:20,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111465392] [2022-11-18 20:42:20,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111465392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:42:20,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:42:20,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:42:20,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145688332] [2022-11-18 20:42:20,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:42:20,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:42:20,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:42:20,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:42:20,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:42:20,139 INFO L87 Difference]: Start difference. First operand 2075 states and 2347 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:25,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:42:25,707 INFO L93 Difference]: Finished difference Result 2073 states and 2345 transitions. [2022-11-18 20:42:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:42:25,716 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 [2022-11-18 20:42:25,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:42:25,728 INFO L225 Difference]: With dead ends: 2073 [2022-11-18 20:42:25,728 INFO L226 Difference]: Without dead ends: 2073 [2022-11-18 20:42:25,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:42:25,736 INFO L413 NwaCegarLoop]: 2341 mSDtfsCounter, 5 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3723 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:42:25,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3723 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-18 20:42:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2022-11-18 20:42:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 2073. [2022-11-18 20:42:25,800 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) [2022-11-18 20:42:25,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 2345 transitions. [2022-11-18 20:42:25,813 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 2345 transitions. Word has length 3 [2022-11-18 20:42:25,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:42:25,813 INFO L495 AbstractCegarLoop]: Abstraction has 2073 states and 2345 transitions. [2022-11-18 20:42:25,813 INFO L496 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) [2022-11-18 20:42:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 2345 transitions. [2022-11-18 20:42:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:42:25,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:42:25,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:42:25,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:42:26,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:26,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:42:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash -890788470, now seen corresponding path program 1 times [2022-11-18 20:42:26,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:42:26,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441131215] [2022-11-18 20:42:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:26,038 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:26,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:42:26,040 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:42:26,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-18 20:42:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:27,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:42:27,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:27,500 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-18 20:42:27,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-18 20:42:27,540 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:42:27,573 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 11 [2022-11-18 20:42:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:27,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:42:27,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:42:27,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441131215] [2022-11-18 20:42:27,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441131215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:42:27,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:42:27,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:42:27,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689195037] [2022-11-18 20:42:27,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:42:27,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:42:27,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:42:27,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:42:27,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:42:27,593 INFO L87 Difference]: Start difference. First operand 2073 states and 2345 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:32,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:42:40,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:42:40,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:42:40,332 INFO L93 Difference]: Finished difference Result 2072 states and 2344 transitions. [2022-11-18 20:42:40,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:42:40,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 20:42:40,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:42:40,340 INFO L225 Difference]: With dead ends: 2072 [2022-11-18 20:42:40,341 INFO L226 Difference]: Without dead ends: 2072 [2022-11-18 20:42:40,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:42:40,342 INFO L413 NwaCegarLoop]: 2340 mSDtfsCounter, 4 mSDsluCounter, 4091 mSDsCounter, 0 mSdLazyCounter, 2934 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6431 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2934 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:42:40,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6431 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2934 Invalid, 2 Unknown, 0 Unchecked, 12.5s Time] [2022-11-18 20:42:40,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2022-11-18 20:42:40,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2022-11-18 20:42:40,388 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) [2022-11-18 20:42:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2344 transitions. [2022-11-18 20:42:40,398 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2344 transitions. Word has length 6 [2022-11-18 20:42:40,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:42:40,398 INFO L495 AbstractCegarLoop]: Abstraction has 2072 states and 2344 transitions. [2022-11-18 20:42:40,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2344 transitions. [2022-11-18 20:42:40,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:42:40,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:42:40,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:42:40,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:42:40,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:40,615 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:42:40,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:40,616 INFO L85 PathProgramCache]: Analyzing trace with hash -890788469, now seen corresponding path program 1 times [2022-11-18 20:42:40,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:42:40,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504210792] [2022-11-18 20:42:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:40,618 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:40,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:42:40,619 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:42:40,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-18 20:42:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:41,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:42:41,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:41,974 INFO L321 Elim1Store]: treesize reduction 130, result has 29.7 percent of original size [2022-11-18 20:42:41,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 60 [2022-11-18 20:42:42,028 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:42:42,041 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:42:42,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-18 20:42:42,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-18 20:42:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:42,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:42:42,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:42:42,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504210792] [2022-11-18 20:42:42,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504210792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:42:42,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:42:42,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:42:42,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632573739] [2022-11-18 20:42:42,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:42:42,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:42:42,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:42:42,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:42:42,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:42:42,131 INFO L87 Difference]: Start difference. First operand 2072 states and 2344 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:48,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:42:56,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:42:57,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:42:57,052 INFO L93 Difference]: Finished difference Result 2071 states and 2343 transitions. [2022-11-18 20:42:57,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:42:57,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 20:42:57,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:42:57,059 INFO L225 Difference]: With dead ends: 2071 [2022-11-18 20:42:57,059 INFO L226 Difference]: Without dead ends: 2071 [2022-11-18 20:42:57,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:42:57,060 INFO L413 NwaCegarLoop]: 2340 mSDtfsCounter, 2 mSDsluCounter, 4154 mSDsCounter, 0 mSdLazyCounter, 2869 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6494 SdHoareTripleChecker+Invalid, 2872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2869 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:42:57,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6494 Invalid, 2872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2869 Invalid, 2 Unknown, 0 Unchecked, 14.8s Time] [2022-11-18 20:42:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2022-11-18 20:42:57,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 2071. [2022-11-18 20:42:57,096 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) [2022-11-18 20:42:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2343 transitions. [2022-11-18 20:42:57,103 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2343 transitions. Word has length 6 [2022-11-18 20:42:57,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:42:57,104 INFO L495 AbstractCegarLoop]: Abstraction has 2071 states and 2343 transitions. [2022-11-18 20:42:57,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:57,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2343 transitions. [2022-11-18 20:42:57,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:42:57,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:42:57,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:42:57,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:42:57,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:57,326 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:42:57,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:57,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1867291348, now seen corresponding path program 1 times [2022-11-18 20:42:57,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:42:57,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415731180] [2022-11-18 20:42:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:57,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:57,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:42:57,330 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:42:57,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-18 20:42:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:58,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:42:58,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:58,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:42:58,395 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:42:58,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415731180] [2022-11-18 20:42:58,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415731180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:42:58,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:42:58,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:42:58,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42459643] [2022-11-18 20:42:58,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:42:58,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:42:58,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:42:58,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:42:58,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:42:58,398 INFO L87 Difference]: Start difference. First operand 2071 states and 2343 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:42:58,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:42:58,493 INFO L93 Difference]: Finished difference Result 2074 states and 2346 transitions. [2022-11-18 20:42:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:42:58,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-18 20:42:58,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:42:58,501 INFO L225 Difference]: With dead ends: 2074 [2022-11-18 20:42:58,501 INFO L226 Difference]: Without dead ends: 2072 [2022-11-18 20:42:58,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:42:58,502 INFO L413 NwaCegarLoop]: 2341 mSDtfsCounter, 2 mSDsluCounter, 4677 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7018 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:42:58,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7018 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:42:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2022-11-18 20:42:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2022-11-18 20:42:58,536 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) [2022-11-18 20:42:58,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2344 transitions. [2022-11-18 20:42:58,544 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2344 transitions. Word has length 13 [2022-11-18 20:42:58,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:42:58,544 INFO L495 AbstractCegarLoop]: Abstraction has 2072 states and 2344 transitions. [2022-11-18 20:42:58,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:42:58,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2344 transitions. [2022-11-18 20:42:58,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 20:42:58,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:42:58,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:42:58,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:42:58,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:58,767 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:42:58,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:58,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1906515750, now seen corresponding path program 1 times [2022-11-18 20:42:58,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:42:58,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794219636] [2022-11-18 20:42:58,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:58,769 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:58,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:42:58,770 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:42:58,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-18 20:42:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:59,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:42:59,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:59,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:59,951 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:42:59,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794219636] [2022-11-18 20:42:59,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794219636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:42:59,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:42:59,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-18 20:42:59,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974832965] [2022-11-18 20:42:59,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:42:59,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:42:59,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:42:59,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:42:59,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:42:59,953 INFO L87 Difference]: Start difference. First operand 2072 states and 2344 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:43:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:00,256 INFO L93 Difference]: Finished difference Result 2084 states and 2359 transitions. [2022-11-18 20:43:00,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:43:00,257 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-18 20:43:00,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:00,264 INFO L225 Difference]: With dead ends: 2084 [2022-11-18 20:43:00,264 INFO L226 Difference]: Without dead ends: 2082 [2022-11-18 20:43:00,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:43:00,265 INFO L413 NwaCegarLoop]: 2340 mSDtfsCounter, 13 mSDsluCounter, 7012 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 9352 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:00,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 9352 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:43:00,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2022-11-18 20:43:00,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 2082. [2022-11-18 20:43:00,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 1026 states have (on average 2.1335282651072123) internal successors, (2189), 1997 states have internal predecessors, (2189), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-18 20:43:00,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 2356 transitions. [2022-11-18 20:43:00,359 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 2356 transitions. Word has length 14 [2022-11-18 20:43:00,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:00,360 INFO L495 AbstractCegarLoop]: Abstraction has 2082 states and 2356 transitions. [2022-11-18 20:43:00,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:43:00,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 2356 transitions. [2022-11-18 20:43:00,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 20:43:00,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:00,361 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:00,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:00,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:00,581 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:43:00,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:00,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1829494956, now seen corresponding path program 2 times [2022-11-18 20:43:00,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:43:00,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030297441] [2022-11-18 20:43:00,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:43:00,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:00,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:43:00,584 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:43:00,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-18 20:43:03,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:43:03,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:03,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:43:03,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:03,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:03,501 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-18 20:43:03,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-18 20:43:05,113 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-18 20:43:05,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-11-18 20:43:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:43:05,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:43:05,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:43:05,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030297441] [2022-11-18 20:43:05,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030297441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:43:05,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:43:05,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:43:05,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268138905] [2022-11-18 20:43:05,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:43:05,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:43:05,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:43:05,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:43:05,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:43:05,209 INFO L87 Difference]: Start difference. First operand 2082 states and 2356 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:43:05,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:05,253 INFO L93 Difference]: Finished difference Result 2083 states and 2356 transitions. [2022-11-18 20:43:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:43:05,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-18 20:43:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:05,260 INFO L225 Difference]: With dead ends: 2083 [2022-11-18 20:43:05,260 INFO L226 Difference]: Without dead ends: 2081 [2022-11-18 20:43:05,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:43:05,261 INFO L413 NwaCegarLoop]: 2335 mSDtfsCounter, 1 mSDsluCounter, 2728 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5063 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1945 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:05,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5063 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 1945 Unchecked, 0.0s Time] [2022-11-18 20:43:05,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2022-11-18 20:43:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 2081. [2022-11-18 20:43:05,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 1026 states have (on average 2.1306042884990255) internal successors, (2186), 1996 states have internal predecessors, (2186), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-18 20:43:05,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 2353 transitions. [2022-11-18 20:43:05,301 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 2353 transitions. Word has length 17 [2022-11-18 20:43:05,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:05,301 INFO L495 AbstractCegarLoop]: Abstraction has 2081 states and 2353 transitions. [2022-11-18 20:43:05,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:43:05,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 2353 transitions. [2022-11-18 20:43:05,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 20:43:05,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:05,302 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:05,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:05,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:05,529 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:43:05,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:05,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1829494955, now seen corresponding path program 1 times [2022-11-18 20:43:05,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:43:05,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524733008] [2022-11-18 20:43:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:05,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:05,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:43:05,533 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:43:05,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-18 20:43:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:06,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:43:06,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:43:06,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:43:07,062 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:43:07,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524733008] [2022-11-18 20:43:07,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524733008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:07,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:43:07,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-18 20:43:07,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858448912] [2022-11-18 20:43:07,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:07,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:43:07,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:43:07,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:43:07,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:43:07,063 INFO L87 Difference]: Start difference. First operand 2081 states and 2353 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:43:08,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:08,164 INFO L93 Difference]: Finished difference Result 2100 states and 2376 transitions. [2022-11-18 20:43:08,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:43:08,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-11-18 20:43:08,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:08,171 INFO L225 Difference]: With dead ends: 2100 [2022-11-18 20:43:08,172 INFO L226 Difference]: Without dead ends: 2090 [2022-11-18 20:43:08,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:43:08,173 INFO L413 NwaCegarLoop]: 2341 mSDtfsCounter, 50 mSDsluCounter, 11692 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 14033 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:08,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 14033 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:43:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2022-11-18 20:43:08,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2090. [2022-11-18 20:43:08,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 1035 states have (on average 2.1207729468599035) internal successors, (2195), 2005 states have internal predecessors, (2195), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-18 20:43:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 2362 transitions. [2022-11-18 20:43:08,214 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 2362 transitions. Word has length 17 [2022-11-18 20:43:08,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:08,215 INFO L495 AbstractCegarLoop]: Abstraction has 2090 states and 2362 transitions. [2022-11-18 20:43:08,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:43:08,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 2362 transitions. [2022-11-18 20:43:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 20:43:08,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:08,216 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:08,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:08,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:08,439 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:43:08,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:08,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1174908437, now seen corresponding path program 2 times [2022-11-18 20:43:08,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:43:08,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443235163] [2022-11-18 20:43:08,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:43:08,442 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:08,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:43:08,444 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:43:08,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-18 20:43:11,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:43:11,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:11,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:43:11,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:11,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:11,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:11,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:11,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:11,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:11,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:11,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:11,653 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-18 20:43:11,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2022-11-18 20:43:11,714 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-18 20:43:11,714 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 34 [2022-11-18 20:43:12,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:12,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:43:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-18 20:43:12,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:43:12,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:43:12,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443235163] [2022-11-18 20:43:12,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443235163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:43:12,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:43:12,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:43:12,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197765977] [2022-11-18 20:43:12,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:43:12,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:43:12,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:43:12,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:43:12,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:43:12,266 INFO L87 Difference]: Start difference. First operand 2090 states and 2362 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:43:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:12,314 INFO L93 Difference]: Finished difference Result 2089 states and 2361 transitions. [2022-11-18 20:43:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:43:12,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-11-18 20:43:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:12,322 INFO L225 Difference]: With dead ends: 2089 [2022-11-18 20:43:12,322 INFO L226 Difference]: Without dead ends: 2089 [2022-11-18 20:43:12,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:43:12,323 INFO L413 NwaCegarLoop]: 2335 mSDtfsCounter, 6 mSDsluCounter, 2769 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 5104 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1902 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:12,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 5104 Invalid, 1905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 1902 Unchecked, 0.0s Time] [2022-11-18 20:43:12,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2022-11-18 20:43:12,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 2089. [2022-11-18 20:43:12,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 1035 states have (on average 2.119806763285024) internal successors, (2194), 2004 states have internal predecessors, (2194), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-18 20:43:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 2361 transitions. [2022-11-18 20:43:12,362 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 2361 transitions. Word has length 23 [2022-11-18 20:43:12,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:12,363 INFO L495 AbstractCegarLoop]: Abstraction has 2089 states and 2361 transitions. [2022-11-18 20:43:12,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:43:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 2361 transitions. [2022-11-18 20:43:12,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 20:43:12,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:12,364 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:12,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:12,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:12,584 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:43:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash -489338443, now seen corresponding path program 1 times [2022-11-18 20:43:12,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:43:12,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477609382] [2022-11-18 20:43:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:12,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:12,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:43:12,588 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:43:12,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-18 20:43:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:13,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 1406 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:43:13,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:43:14,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:43:15,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:43:15,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477609382] [2022-11-18 20:43:15,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477609382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:15,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:43:15,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-18 20:43:15,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222563849] [2022-11-18 20:43:15,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:15,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 20:43:15,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:43:15,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 20:43:15,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:43:15,153 INFO L87 Difference]: Start difference. First operand 2089 states and 2361 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:43:18,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:18,914 INFO L93 Difference]: Finished difference Result 2123 states and 2405 transitions. [2022-11-18 20:43:18,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-18 20:43:18,915 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-18 20:43:18,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:18,922 INFO L225 Difference]: With dead ends: 2123 [2022-11-18 20:43:18,923 INFO L226 Difference]: Without dead ends: 2107 [2022-11-18 20:43:18,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=890, Invalid=1866, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 20:43:18,924 INFO L413 NwaCegarLoop]: 2343 mSDtfsCounter, 126 mSDsluCounter, 25739 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 28082 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:18,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 28082 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-18 20:43:18,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2022-11-18 20:43:18,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 2107. [2022-11-18 20:43:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 1053 states have (on average 2.100664767331434) internal successors, (2212), 2022 states have internal predecessors, (2212), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-18 20:43:18,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 2379 transitions. [2022-11-18 20:43:18,963 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 2379 transitions. Word has length 25 [2022-11-18 20:43:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:18,963 INFO L495 AbstractCegarLoop]: Abstraction has 2107 states and 2379 transitions. [2022-11-18 20:43:18,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:43:18,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 2379 transitions. [2022-11-18 20:43:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-18 20:43:18,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:18,965 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:18,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:19,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:19,179 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:43:19,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:19,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1797314357, now seen corresponding path program 2 times [2022-11-18 20:43:19,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:43:19,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937085100] [2022-11-18 20:43:19,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:43:19,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:19,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:43:19,182 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:43:19,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-18 20:43:22,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:43:22,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:22,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 1296 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 20:43:22,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:22,524 INFO L321 Elim1Store]: treesize reduction 420, result has 11.8 percent of original size [2022-11-18 20:43:22,524 INFO L350 Elim1Store]: Elim1 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 91 treesize of output 123 [2022-11-18 20:43:26,607 INFO L321 Elim1Store]: treesize reduction 80, result has 31.0 percent of original size [2022-11-18 20:43:26,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 68 [2022-11-18 20:43:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-18 20:43:26,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:43:26,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:43:26,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937085100] [2022-11-18 20:43:26,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937085100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:43:26,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:43:26,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:43:26,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750820298] [2022-11-18 20:43:26,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:43:26,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:43:26,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:43:26,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:43:26,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:43:26,987 INFO L87 Difference]: Start difference. First operand 2107 states and 2379 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:43:30,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:30,769 INFO L93 Difference]: Finished difference Result 2106 states and 2378 transitions. [2022-11-18 20:43:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:43:30,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-11-18 20:43:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:30,777 INFO L225 Difference]: With dead ends: 2106 [2022-11-18 20:43:30,777 INFO L226 Difference]: Without dead ends: 2106 [2022-11-18 20:43:30,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:43:30,778 INFO L413 NwaCegarLoop]: 2332 mSDtfsCounter, 6 mSDsluCounter, 2714 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 5046 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 980 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:30,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 5046 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 971 Invalid, 0 Unknown, 980 Unchecked, 3.7s Time] [2022-11-18 20:43:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2022-11-18 20:43:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2106. [2022-11-18 20:43:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 1053 states have (on average 2.0997150997150995) internal successors, (2211), 2021 states have internal predecessors, (2211), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-18 20:43:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 2378 transitions. [2022-11-18 20:43:30,815 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 2378 transitions. Word has length 37 [2022-11-18 20:43:30,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:30,816 INFO L495 AbstractCegarLoop]: Abstraction has 2106 states and 2378 transitions. [2022-11-18 20:43:30,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:43:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 2378 transitions. [2022-11-18 20:43:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-18 20:43:30,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:30,817 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:30,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:31,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:31,035 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:43:31,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:31,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1797314358, now seen corresponding path program 1 times [2022-11-18 20:43:31,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:43:31,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109246773] [2022-11-18 20:43:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:31,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:31,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:43:31,038 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:43:31,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-18 20:43:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:32,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 20:43:32,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:43:33,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:43:36,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:43:36,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109246773] [2022-11-18 20:43:36,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109246773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:36,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:43:36,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-11-18 20:43:36,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304486013] [2022-11-18 20:43:36,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:36,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 20:43:36,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:43:36,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 20:43:36,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 20:43:36,145 INFO L87 Difference]: Start difference. First operand 2106 states and 2378 transitions. Second operand has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:43:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:51,014 INFO L93 Difference]: Finished difference Result 2170 states and 2464 transitions. [2022-11-18 20:43:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-18 20:43:51,015 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-11-18 20:43:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:51,023 INFO L225 Difference]: With dead ends: 2170 [2022-11-18 20:43:51,023 INFO L226 Difference]: Without dead ends: 2142 [2022-11-18 20:43:51,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=3512, Invalid=7830, Unknown=0, NotChecked=0, Total=11342 [2022-11-18 20:43:51,025 INFO L413 NwaCegarLoop]: 2348 mSDtfsCounter, 361 mSDsluCounter, 63254 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 65602 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:51,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 65602 Invalid, 1965 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [335 Valid, 1630 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-18 20:43:51,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2022-11-18 20:43:51,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2142. [2022-11-18 20:43:51,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 1089 states have (on average 2.0633608815426996) internal successors, (2247), 2057 states have internal predecessors, (2247), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-18 20:43:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 2414 transitions. [2022-11-18 20:43:51,060 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 2414 transitions. Word has length 37 [2022-11-18 20:43:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:51,060 INFO L495 AbstractCegarLoop]: Abstraction has 2142 states and 2414 transitions. [2022-11-18 20:43:51,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:43:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 2414 transitions. [2022-11-18 20:43:51,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-18 20:43:51,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:51,062 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:51,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:51,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:51,283 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:43:51,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash 283062838, now seen corresponding path program 2 times [2022-11-18 20:43:51,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:43:51,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89000843] [2022-11-18 20:43:51,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:43:51,286 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:51,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:43:51,289 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:43:51,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-18 20:43:54,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:43:54,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:54,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 1296 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:43:54,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:54,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:54,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:54,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:54,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:54,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:54,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:54,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:54,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:54,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:54,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:54,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:54,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:54,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:54,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:54,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:54,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 34 [2022-11-18 20:43:55,164 INFO L321 Elim1Store]: treesize reduction 420, result has 11.8 percent of original size [2022-11-18 20:43:55,165 INFO L350 Elim1Store]: Elim1 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 91 treesize of output 123 [2022-11-18 20:44:02,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:44:02,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:44:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-18 20:44:02,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:44:02,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:44:02,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89000843] [2022-11-18 20:44:02,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89000843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:44:02,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:44:02,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:44:02,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453123245] [2022-11-18 20:44:02,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:02,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:44:02,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:44:02,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:44:02,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:44:02,545 INFO L87 Difference]: Start difference. First operand 2142 states and 2414 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:44:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:14,030 INFO L93 Difference]: Finished difference Result 3532 states and 4049 transitions. [2022-11-18 20:44:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:44:14,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-11-18 20:44:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:14,045 INFO L225 Difference]: With dead ends: 3532 [2022-11-18 20:44:14,046 INFO L226 Difference]: Without dead ends: 3532 [2022-11-18 20:44:14,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:44:14,047 INFO L413 NwaCegarLoop]: 1063 mSDtfsCounter, 2722 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2724 SdHoareTripleChecker+Valid, 3076 SdHoareTripleChecker+Invalid, 4190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1270 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:14,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2724 Valid, 3076 Invalid, 4190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2894 Invalid, 0 Unknown, 1270 Unchecked, 11.4s Time] [2022-11-18 20:44:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3532 states. [2022-11-18 20:44:14,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3532 to 2867. [2022-11-18 20:44:14,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 1748 states have (on average 2.0635011441647597) internal successors, (3607), 2717 states have internal predecessors, (3607), 149 states have call successors, (149), 42 states have call predecessors, (149), 43 states have return successors, (132), 121 states have call predecessors, (132), 126 states have call successors, (132) [2022-11-18 20:44:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 3888 transitions. [2022-11-18 20:44:14,107 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 3888 transitions. Word has length 61 [2022-11-18 20:44:14,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:14,107 INFO L495 AbstractCegarLoop]: Abstraction has 2867 states and 3888 transitions. [2022-11-18 20:44:14,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:44:14,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 3888 transitions. [2022-11-18 20:44:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 20:44:14,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:14,110 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:44:14,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:44:14,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:44:14,331 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:44:14,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:14,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1440500246, now seen corresponding path program 1 times [2022-11-18 20:44:14,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:44:14,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807321113] [2022-11-18 20:44:14,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:14,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:44:14,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:44:14,335 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:44:14,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-18 20:44:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:15,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 1832 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-18 20:44:15,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:18,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:44:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:29,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:44:29,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807321113] [2022-11-18 20:44:29,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807321113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:44:29,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:44:29,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-11-18 20:44:29,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605672263] [2022-11-18 20:44:29,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:44:29,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-18 20:44:29,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:44:29,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-18 20:44:29,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2497, Invalid=7009, Unknown=0, NotChecked=0, Total=9506 [2022-11-18 20:44:29,769 INFO L87 Difference]: Start difference. First operand 2867 states and 3888 transitions. Second operand has 98 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 98 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:45:44,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:44,481 INFO L93 Difference]: Finished difference Result 2991 states and 4058 transitions. [2022-11-18 20:45:44,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-11-18 20:45:44,482 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 98 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2022-11-18 20:45:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:44,490 INFO L225 Difference]: With dead ends: 2991 [2022-11-18 20:45:44,490 INFO L226 Difference]: Without dead ends: 2939 [2022-11-18 20:45:44,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3587 ImplicationChecksByTransitivity, 70.4s TimeCoverageRelationStatistics Valid=13940, Invalid=32070, Unknown=0, NotChecked=0, Total=46010 [2022-11-18 20:45:44,500 INFO L413 NwaCegarLoop]: 2354 mSDtfsCounter, 1333 mSDsluCounter, 112803 mSDsCounter, 0 mSdLazyCounter, 6121 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1333 SdHoareTripleChecker+Valid, 115157 SdHoareTripleChecker+Invalid, 7384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1263 IncrementalHoareTripleChecker+Valid, 6121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:44,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1333 Valid, 115157 Invalid, 7384 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1263 Valid, 6121 Invalid, 0 Unknown, 0 Unchecked, 15.6s Time] [2022-11-18 20:45:44,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2022-11-18 20:45:44,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2939. [2022-11-18 20:45:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 1820 states have (on average 2.0214285714285714) internal successors, (3679), 2789 states have internal predecessors, (3679), 149 states have call successors, (149), 42 states have call predecessors, (149), 43 states have return successors, (132), 121 states have call predecessors, (132), 126 states have call successors, (132) [2022-11-18 20:45:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 3960 transitions. [2022-11-18 20:45:44,559 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 3960 transitions. Word has length 63 [2022-11-18 20:45:44,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:44,561 INFO L495 AbstractCegarLoop]: Abstraction has 2939 states and 3960 transitions. [2022-11-18 20:45:44,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 98 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:45:44,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 3960 transitions. [2022-11-18 20:45:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-18 20:45:44,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:44,569 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:44,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:44,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:45:44,783 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:45:44,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:44,783 INFO L85 PathProgramCache]: Analyzing trace with hash -387940330, now seen corresponding path program 2 times [2022-11-18 20:45:44,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:45:44,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795330202] [2022-11-18 20:45:44,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:45:44,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:45:44,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:45:44,787 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:45:44,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-18 20:45:47,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:45:47,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:47,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:45:47,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:47,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:47,405 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-18 20:45:47,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-18 20:45:52,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:52,670 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-18 20:45:52,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-18 20:45:53,647 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-18 20:45:53,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-18 20:45:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-18 20:45:53,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:45:53,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:45:53,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795330202] [2022-11-18 20:45:53,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [795330202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:53,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:53,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:45:53,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563641871] [2022-11-18 20:45:53,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:53,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:45:53,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:45:53,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:45:53,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:45:53,931 INFO L87 Difference]: Start difference. First operand 2939 states and 3960 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:45:53,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:53,967 INFO L93 Difference]: Finished difference Result 2938 states and 3959 transitions. [2022-11-18 20:45:53,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:45:53,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-11-18 20:45:53,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:53,975 INFO L225 Difference]: With dead ends: 2938 [2022-11-18 20:45:53,975 INFO L226 Difference]: Without dead ends: 2938 [2022-11-18 20:45:53,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:45:53,976 INFO L413 NwaCegarLoop]: 2323 mSDtfsCounter, 2 mSDsluCounter, 2717 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5040 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1936 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:53,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5040 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 1936 Unchecked, 0.0s Time] [2022-11-18 20:45:53,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2022-11-18 20:45:54,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2022-11-18 20:45:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 1820 states have (on average 2.020879120879121) internal successors, (3678), 2788 states have internal predecessors, (3678), 149 states have call successors, (149), 42 states have call predecessors, (149), 43 states have return successors, (132), 121 states have call predecessors, (132), 126 states have call successors, (132) [2022-11-18 20:45:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 3959 transitions. [2022-11-18 20:45:54,024 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 3959 transitions. Word has length 111 [2022-11-18 20:45:54,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:54,025 INFO L495 AbstractCegarLoop]: Abstraction has 2938 states and 3959 transitions. [2022-11-18 20:45:54,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:45:54,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 3959 transitions. [2022-11-18 20:45:54,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-18 20:45:54,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:54,033 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:54,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:54,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:45:54,256 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:45:54,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:54,256 INFO L85 PathProgramCache]: Analyzing trace with hash -387940329, now seen corresponding path program 1 times [2022-11-18 20:45:54,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:45:54,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26591323] [2022-11-18 20:45:54,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:54,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:45:54,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:45:54,260 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:45:54,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-18 20:45:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:55,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 2360 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-18 20:45:55,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:06,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:49,236 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:46:49,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26591323] [2022-11-18 20:46:49,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26591323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:49,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:46:49,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2022-11-18 20:46:49,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297846479] [2022-11-18 20:46:49,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:49,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-11-18 20:46:49,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:46:49,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-11-18 20:46:49,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9601, Invalid=27841, Unknown=0, NotChecked=0, Total=37442 [2022-11-18 20:46:49,246 INFO L87 Difference]: Start difference. First operand 2938 states and 3959 transitions. Second operand has 194 states, 194 states have (on average 1.0618556701030928) internal successors, (206), 194 states have internal predecessors, (206), 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) [2022-11-18 20:55:31,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:31,834 INFO L93 Difference]: Finished difference Result 3279 states and 4535 transitions. [2022-11-18 20:55:31,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-18 20:55:31,835 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.0618556701030928) internal successors, (206), 194 states have internal predecessors, (206), 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 111 [2022-11-18 20:55:31,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:31,893 INFO L225 Difference]: With dead ends: 3279 [2022-11-18 20:55:31,894 INFO L226 Difference]: Without dead ends: 3275 [2022-11-18 20:55:31,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 476 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22418 ImplicationChecksByTransitivity, 453.4s TimeCoverageRelationStatistics Valid=64697, Invalid=163309, Unknown=0, NotChecked=0, Total=228006 [2022-11-18 20:55:31,918 INFO L413 NwaCegarLoop]: 2378 mSDtfsCounter, 5153 mSDsluCounter, 225487 mSDsCounter, 0 mSdLazyCounter, 42045 mSolverCounterSat, 4872 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5153 SdHoareTripleChecker+Valid, 227865 SdHoareTripleChecker+Invalid, 46917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.6s SdHoareTripleChecker+Time, 4872 IncrementalHoareTripleChecker+Valid, 42045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:31,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5153 Valid, 227865 Invalid, 46917 Unknown, 0 Unchecked, 0.6s Time], IncrementalHoareTripleChecker [4872 Valid, 42045 Invalid, 0 Unknown, 0 Unchecked, 110.4s Time] [2022-11-18 20:55:31,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2022-11-18 20:55:31,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 3181. [2022-11-18 20:55:31,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3181 states, 2062 states have (on average 1.9471387002909797) internal successors, (4015), 3030 states have internal predecessors, (4015), 149 states have call successors, (149), 43 states have call predecessors, (149), 44 states have return successors, (132), 121 states have call predecessors, (132), 126 states have call successors, (132) [2022-11-18 20:55:31,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3181 states to 3181 states and 4296 transitions. [2022-11-18 20:55:31,982 INFO L78 Accepts]: Start accepts. Automaton has 3181 states and 4296 transitions. Word has length 111 [2022-11-18 20:55:31,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:31,983 INFO L495 AbstractCegarLoop]: Abstraction has 3181 states and 4296 transitions. [2022-11-18 20:55:31,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.0618556701030928) internal successors, (206), 194 states have internal predecessors, (206), 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) [2022-11-18 20:55:31,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3181 states and 4296 transitions. [2022-11-18 20:55:31,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-18 20:55:31,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:31,986 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:32,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:32,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:55:32,203 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:55:32,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:32,217 INFO L85 PathProgramCache]: Analyzing trace with hash -228791273, now seen corresponding path program 2 times [2022-11-18 20:55:32,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:55:32,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274840383] [2022-11-18 20:55:32,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:55:32,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:55:32,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:55:32,222 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:55:32,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-18 20:55:37,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:55:37,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:55:37,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:55:37,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:37,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:55:37,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:55:37,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:55:37,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:55:37,585 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-18 20:55:37,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-18 20:55:37,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 20:55:40,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:55:40,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:55:41,024 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:55:41,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 20:55:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-11-18 20:55:41,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:55:41,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:55:41,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274840383] [2022-11-18 20:55:41,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274840383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:41,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:41,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:55:41,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769351018] [2022-11-18 20:55:41,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:41,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:55:41,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:55:41,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:55:41,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:55:41,226 INFO L87 Difference]: Start difference. First operand 3181 states and 4296 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:55:48,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:48,035 INFO L93 Difference]: Finished difference Result 3180 states and 4295 transitions. [2022-11-18 20:55:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:55:48,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-11-18 20:55:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:48,044 INFO L225 Difference]: With dead ends: 3180 [2022-11-18 20:55:48,045 INFO L226 Difference]: Without dead ends: 3180 [2022-11-18 20:55:48,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:55:48,045 INFO L413 NwaCegarLoop]: 2323 mSDtfsCounter, 9 mSDsluCounter, 5512 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 7835 SdHoareTripleChecker+Invalid, 3788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2836 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:48,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 7835 Invalid, 3788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 950 Invalid, 0 Unknown, 2836 Unchecked, 6.6s Time] [2022-11-18 20:55:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2022-11-18 20:55:48,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 3180. [2022-11-18 20:55:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3180 states, 2062 states have (on average 1.9466537342386032) internal successors, (4014), 3029 states have internal predecessors, (4014), 149 states have call successors, (149), 43 states have call predecessors, (149), 44 states have return successors, (132), 121 states have call predecessors, (132), 126 states have call successors, (132) [2022-11-18 20:55:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3180 states to 3180 states and 4295 transitions. [2022-11-18 20:55:48,103 INFO L78 Accepts]: Start accepts. Automaton has 3180 states and 4295 transitions. Word has length 207 [2022-11-18 20:55:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:48,103 INFO L495 AbstractCegarLoop]: Abstraction has 3180 states and 4295 transitions. [2022-11-18 20:55:48,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:55:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3180 states and 4295 transitions. [2022-11-18 20:55:48,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-18 20:55:48,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:48,106 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:48,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:48,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:55:48,328 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-11-18 20:55:48,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:48,328 INFO L85 PathProgramCache]: Analyzing trace with hash -825028553, now seen corresponding path program 1 times [2022-11-18 20:55:48,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:55:48,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632053319] [2022-11-18 20:55:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:48,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:55:48,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:55:48,333 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:55:48,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540e6893-2cc8-4984-94ee-817618fa909c/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-18 20:55:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:51,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 3430 conjuncts, 193 conjunts are in the unsatisfiable core [2022-11-18 20:55:51,083 INFO L286 TraceCheckSpWp]: Computing forward predicates...