./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1df2ca055a97db0a00e0c4b03f212c5ac3c2765d37b628ab5708f179a281754f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:25:42,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:25:42,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:25:42,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:25:42,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:25:42,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:25:42,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:25:42,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:25:42,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:25:42,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:25:42,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:25:42,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:25:42,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:25:42,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:25:42,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:25:42,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:25:42,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:25:42,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:25:42,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:25:42,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:25:42,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:25:42,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:25:42,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:25:42,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:25:42,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:25:42,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:25:42,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:25:42,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:25:42,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:25:42,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:25:42,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:25:42,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:25:42,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:25:42,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:25:42,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:25:42,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:25:42,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:25:42,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:25:42,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:25:42,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:25:42,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:25:42,630 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 03:25:42,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:25:42,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:25:42,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:25:42,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:25:42,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:25:42,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:25:42,681 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:25:42,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:25:42,681 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:25:42,682 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:25:42,683 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:25:42,683 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:25:42,683 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:25:42,683 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:25:42,684 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:25:42,684 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:25:42,684 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:25:42,684 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:25:42,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:25:42,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:25:42,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:25:42,686 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:25:42,686 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:25:42,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:25:42,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:25:42,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:25:42,688 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:25:42,688 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:25:42,688 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:25:42,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:25:42,689 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:25:42,689 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:25:42,689 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:25:42,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:25:42,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:25:42,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:25:42,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:25:42,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:25:42,691 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:25:42,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:25:42,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:25:42,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:25:42,692 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1df2ca055a97db0a00e0c4b03f212c5ac3c2765d37b628ab5708f179a281754f [2021-11-23 03:25:43,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:25:43,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:25:43,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:25:43,055 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:25:43,055 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:25:43,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i [2021-11-23 03:25:43,129 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/data/229ef1e7d/10c2890c14984b01a4223eaa8d7cc1bc/FLAGcde146b67 [2021-11-23 03:25:43,807 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:25:43,807 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i [2021-11-23 03:25:43,834 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/data/229ef1e7d/10c2890c14984b01a4223eaa8d7cc1bc/FLAGcde146b67 [2021-11-23 03:25:44,033 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/data/229ef1e7d/10c2890c14984b01a4223eaa8d7cc1bc [2021-11-23 03:25:44,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:25:44,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:25:44,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:25:44,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:25:44,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:25:44,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:25:44" (1/1) ... [2021-11-23 03:25:44,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72eb3d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:44, skipping insertion in model container [2021-11-23 03:25:44,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:25:44" (1/1) ... [2021-11-23 03:25:44,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:25:44,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:25:44,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:25:44,630 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-23 03:25:44,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1e64cf0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:44, skipping insertion in model container [2021-11-23 03:25:44,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:25:44,631 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-23 03:25:44,634 INFO L158 Benchmark]: Toolchain (without parser) took 593.73ms. Allocated memory is still 94.4MB. Free memory was 59.8MB in the beginning and 66.6MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:25:44,636 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 94.4MB. Free memory was 67.8MB in the beginning and 67.8MB in the end (delta: 29.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:25:44,637 INFO L158 Benchmark]: CACSL2BoogieTranslator took 589.58ms. Allocated memory is still 94.4MB. Free memory was 59.5MB in the beginning and 66.6MB in the end (delta: -7.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:25:44,639 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 94.4MB. Free memory was 67.8MB in the beginning and 67.8MB in the end (delta: 29.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 589.58ms. Allocated memory is still 94.4MB. Free memory was 59.5MB in the beginning and 66.6MB in the end (delta: -7.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1df2ca055a97db0a00e0c4b03f212c5ac3c2765d37b628ab5708f179a281754f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:25:47,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:25:47,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:25:47,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:25:47,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:25:47,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:25:47,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:25:47,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:25:47,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:25:47,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:25:47,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:25:47,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:25:47,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:25:47,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:25:47,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:25:47,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:25:47,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:25:47,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:25:47,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:25:47,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:25:47,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:25:47,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:25:47,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:25:47,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:25:47,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:25:47,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:25:47,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:25:47,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:25:47,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:25:47,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:25:47,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:25:47,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:25:47,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:25:47,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:25:47,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:25:47,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:25:47,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:25:47,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:25:47,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:25:47,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:25:47,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:25:47,287 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 03:25:47,333 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:25:47,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:25:47,335 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:25:47,335 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:25:47,336 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:25:47,336 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:25:47,336 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:25:47,336 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:25:47,337 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:25:47,338 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:25:47,339 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:25:47,339 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:25:47,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:25:47,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:25:47,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:25:47,341 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:25:47,341 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:25:47,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:25:47,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:25:47,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:25:47,342 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:25:47,342 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:25:47,342 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:25:47,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:25:47,343 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:25:47,343 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 03:25:47,343 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 03:25:47,343 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:25:47,344 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:25:47,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:25:47,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 03:25:47,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:25:47,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:25:47,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:25:47,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:25:47,346 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 03:25:47,346 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 03:25:47,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:25:47,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:25:47,360 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_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1df2ca055a97db0a00e0c4b03f212c5ac3c2765d37b628ab5708f179a281754f [2021-11-23 03:25:47,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:25:47,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:25:47,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:25:47,854 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:25:47,855 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:25:47,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i [2021-11-23 03:25:47,945 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/data/073480115/ac3650405155499d9c997b76d1d9f400/FLAG0a222211f [2021-11-23 03:25:48,790 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:25:48,791 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i [2021-11-23 03:25:48,807 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/data/073480115/ac3650405155499d9c997b76d1d9f400/FLAG0a222211f [2021-11-23 03:25:48,929 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/data/073480115/ac3650405155499d9c997b76d1d9f400 [2021-11-23 03:25:48,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:25:48,933 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:25:48,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:25:48,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:25:48,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:25:48,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:25:48" (1/1) ... [2021-11-23 03:25:48,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d28476f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:48, skipping insertion in model container [2021-11-23 03:25:48,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:25:48" (1/1) ... [2021-11-23 03:25:48,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:25:49,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:25:49,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:25:49,491 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 03:25:49,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:25:49,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:25:49,577 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:25:49,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:25:49,697 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:25:49,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:49 WrapperNode [2021-11-23 03:25:49,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:25:49,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:25:49,700 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:25:49,700 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:25:49,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:49" (1/1) ... [2021-11-23 03:25:49,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:49" (1/1) ... [2021-11-23 03:25:49,786 INFO L137 Inliner]: procedures = 171, calls = 87, calls flagged for inlining = 25, calls inlined = 7, statements flattened = 76 [2021-11-23 03:25:49,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:25:49,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:25:49,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:25:49,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:25:49,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:49" (1/1) ... [2021-11-23 03:25:49,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:49" (1/1) ... [2021-11-23 03:25:49,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:49" (1/1) ... [2021-11-23 03:25:49,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:49" (1/1) ... [2021-11-23 03:25:49,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:49" (1/1) ... [2021-11-23 03:25:49,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:49" (1/1) ... [2021-11-23 03:25:49,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:49" (1/1) ... [2021-11-23 03:25:49,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:25:49,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:25:49,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:25:49,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:25:49,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:49" (1/1) ... [2021-11-23 03:25:49,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:25:49,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:25:49,882 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:25:49,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:25:49,932 INFO L130 BoogieDeclarations]: Found specification of procedure f19_undo [2021-11-23 03:25:49,932 INFO L138 BoogieDeclarations]: Found implementation of procedure f19_undo [2021-11-23 03:25:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:25:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:25:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:25:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:25:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:25:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:25:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:25:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:25:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:25:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:25:49,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:25:50,073 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:25:50,075 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:25:50,456 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:25:50,463 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:25:50,463 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:25:50,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:25:50 BoogieIcfgContainer [2021-11-23 03:25:50,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:25:50,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:25:50,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:25:50,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:25:50,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:25:48" (1/3) ... [2021-11-23 03:25:50,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@febf52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:25:50, skipping insertion in model container [2021-11-23 03:25:50,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:49" (2/3) ... [2021-11-23 03:25:50,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@febf52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:25:50, skipping insertion in model container [2021-11-23 03:25:50,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:25:50" (3/3) ... [2021-11-23 03:25:50,477 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test19-2.i [2021-11-23 03:25:50,483 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:25:50,484 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2021-11-23 03:25:50,545 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:25:50,553 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:25:50,554 INFO L340 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2021-11-23 03:25:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 64 states have internal predecessors, (69), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:25:50,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:25:50,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:25:50,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:25:50,594 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:25:50,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:25:50,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1461209413, now seen corresponding path program 1 times [2021-11-23 03:25:50,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:25:50,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572180968] [2021-11-23 03:25:50,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:25:50,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:25:50,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:25:50,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:25:50,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 03:25:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:25:50,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:25:50,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:25:50,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:25:51,029 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:25:51,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 20 [2021-11-23 03:25:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:25:51,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:25:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:25:51,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:25:51,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572180968] [2021-11-23 03:25:51,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572180968] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:25:51,279 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:25:51,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 5 [2021-11-23 03:25:51,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193851366] [2021-11-23 03:25:51,281 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:25:51,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:25:51,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:25:51,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:25:51,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:25:51,329 INFO L87 Difference]: Start difference. First operand has 70 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 64 states have internal predecessors, (69), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:25:51,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:25:51,575 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2021-11-23 03:25:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:25:51,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 8 [2021-11-23 03:25:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:25:51,595 INFO L225 Difference]: With dead ends: 98 [2021-11-23 03:25:51,595 INFO L226 Difference]: Without dead ends: 96 [2021-11-23 03:25:51,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:25:51,601 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 51 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:25:51,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 208 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2021-11-23 03:25:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-23 03:25:51,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 75. [2021-11-23 03:25:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 68 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-23 03:25:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2021-11-23 03:25:51,677 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 8 [2021-11-23 03:25:51,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:25:51,677 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2021-11-23 03:25:51,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:25:51,678 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2021-11-23 03:25:51,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:25:51,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:25:51,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:25:51,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 03:25:51,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:25:51,890 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:25:51,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:25:51,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1461209414, now seen corresponding path program 1 times [2021-11-23 03:25:51,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:25:51,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761840514] [2021-11-23 03:25:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:25:51,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:25:51,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:25:51,900 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:25:51,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 03:25:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:25:52,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 03:25:52,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:25:52,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:25:52,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:25:54,218 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:25:54,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 32 [2021-11-23 03:25:54,235 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:25:54,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 03:25:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:25:54,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:01,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:26:01,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761840514] [2021-11-23 03:26:01,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761840514] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:26:01,814 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:26:01,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-23 03:26:01,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783533580] [2021-11-23 03:26:01,815 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:26:01,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:26:01,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:26:01,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:26:01,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=65, Unknown=2, NotChecked=0, Total=90 [2021-11-23 03:26:01,818 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 10 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:26:02,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:26:02,123 INFO L93 Difference]: Finished difference Result 116 states and 132 transitions. [2021-11-23 03:26:02,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:26:02,125 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 8 [2021-11-23 03:26:02,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:26:02,127 INFO L225 Difference]: With dead ends: 116 [2021-11-23 03:26:02,127 INFO L226 Difference]: Without dead ends: 116 [2021-11-23 03:26:02,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=23, Invalid=65, Unknown=2, NotChecked=0, Total=90 [2021-11-23 03:26:02,129 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 68 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:26:02,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 255 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 44 Invalid, 0 Unknown, 127 Unchecked, 0.3s Time] [2021-11-23 03:26:02,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-23 03:26:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 77. [2021-11-23 03:26:02,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 69 states have internal predecessors, (82), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:26:02,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2021-11-23 03:26:02,142 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 8 [2021-11-23 03:26:02,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:26:02,143 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2021-11-23 03:26:02,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:26:02,143 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2021-11-23 03:26:02,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:26:02,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:26:02,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:26:02,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:02,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:26:02,352 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:26:02,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:26:02,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1807662222, now seen corresponding path program 1 times [2021-11-23 03:26:02,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:26:02,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828999995] [2021-11-23 03:26:02,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:02,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:26:02,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:26:02,357 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:26:02,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 03:26:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:02,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:26:02,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:02,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:26:02,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-23 03:26:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:02,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:02,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:26:02,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828999995] [2021-11-23 03:26:02,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828999995] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:26:02,709 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:26:02,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-23 03:26:02,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958490243] [2021-11-23 03:26:02,710 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:26:02,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:26:02,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:26:02,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:26:02,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:26:02,712 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:26:02,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:26:02,901 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2021-11-23 03:26:02,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:26:02,904 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 15 [2021-11-23 03:26:02,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:26:02,905 INFO L225 Difference]: With dead ends: 88 [2021-11-23 03:26:02,906 INFO L226 Difference]: Without dead ends: 88 [2021-11-23 03:26:02,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:26:02,908 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 4 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:26:02,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 336 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:26:02,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-23 03:26:02,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2021-11-23 03:26:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 74 states have internal predecessors, (87), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-23 03:26:02,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2021-11-23 03:26:02,922 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 15 [2021-11-23 03:26:02,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:26:02,922 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2021-11-23 03:26:02,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:26:02,923 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2021-11-23 03:26:02,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:26:02,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:26:02,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:26:02,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:03,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:26:03,125 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:26:03,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:26:03,126 INFO L85 PathProgramCache]: Analyzing trace with hash 690353715, now seen corresponding path program 1 times [2021-11-23 03:26:03,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:26:03,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542386079] [2021-11-23 03:26:03,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:03,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:26:03,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:26:03,128 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:26:03,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 03:26:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:03,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:26:03,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:03,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:03,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:26:03,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542386079] [2021-11-23 03:26:03,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542386079] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:26:03,348 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:26:03,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-23 03:26:03,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223042758] [2021-11-23 03:26:03,348 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:26:03,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:26:03,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:26:03,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:26:03,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:26:03,350 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:26:03,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:26:03,496 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2021-11-23 03:26:03,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:26:03,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-11-23 03:26:03,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:26:03,500 INFO L225 Difference]: With dead ends: 110 [2021-11-23 03:26:03,500 INFO L226 Difference]: Without dead ends: 110 [2021-11-23 03:26:03,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:26:03,502 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 64 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:26:03,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 402 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:26:03,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-23 03:26:03,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2021-11-23 03:26:03,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.6229508196721312) internal successors, (99), 80 states have internal predecessors, (99), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-23 03:26:03,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2021-11-23 03:26:03,520 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 15 [2021-11-23 03:26:03,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:26:03,521 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2021-11-23 03:26:03,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:26:03,521 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2021-11-23 03:26:03,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:26:03,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:26:03,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:26:03,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:03,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:26:03,735 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:26:03,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:26:03,736 INFO L85 PathProgramCache]: Analyzing trace with hash 891124571, now seen corresponding path program 1 times [2021-11-23 03:26:03,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:26:03,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038829025] [2021-11-23 03:26:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:03,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:26:03,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:26:03,740 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:26:03,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 03:26:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:03,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:26:03,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:03,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:26:04,012 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:26:04,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 22 [2021-11-23 03:26:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:04,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:04,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:26:04,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038829025] [2021-11-23 03:26:04,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038829025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:26:04,268 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:26:04,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 7 [2021-11-23 03:26:04,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109418354] [2021-11-23 03:26:04,268 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:26:04,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:26:04,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:26:04,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:26:04,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:26:04,270 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 03:26:04,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:26:04,594 INFO L93 Difference]: Finished difference Result 127 states and 140 transitions. [2021-11-23 03:26:04,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:26:04,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 17 [2021-11-23 03:26:04,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:26:04,596 INFO L225 Difference]: With dead ends: 127 [2021-11-23 03:26:04,596 INFO L226 Difference]: Without dead ends: 127 [2021-11-23 03:26:04,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:26:04,597 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 83 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:26:04,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 319 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 123 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2021-11-23 03:26:04,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-23 03:26:04,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2021-11-23 03:26:04,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 78 states have internal predecessors, (95), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-23 03:26:04,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2021-11-23 03:26:04,610 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 17 [2021-11-23 03:26:04,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:26:04,610 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2021-11-23 03:26:04,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 03:26:04,610 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2021-11-23 03:26:04,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:26:04,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:26:04,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:26:04,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 03:26:04,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:26:04,827 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:26:04,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:26:04,828 INFO L85 PathProgramCache]: Analyzing trace with hash 891124572, now seen corresponding path program 1 times [2021-11-23 03:26:04,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:26:04,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387986709] [2021-11-23 03:26:04,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:04,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:26:04,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:26:04,829 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:26:04,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 03:26:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:04,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 03:26:04,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:07,173 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:26:07,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 34 [2021-11-23 03:26:07,187 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:26:07,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-23 03:26:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:07,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:17,601 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_4| (_ BitVec 32)) (|v_ldv_malloc_#res.base_28| (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_27| (_ BitVec 32))) (and (or (exists ((v_ldv_malloc_~size_26 (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_2|) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_27| v_ldv_malloc_~size_26) |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_4|)))) (not (bvule |v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_2| (bvadd (_ bv4 32) |v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_2|)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_27|))))))) (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_2|) (select (store |c_#length| |v_ldv_malloc_#res.base_28| ldv_malloc_~size) |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_4|))) (bvule |v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_2| (bvadd (_ bv4 32) |v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_2|))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_28|))))))))) is different from true [2021-11-23 03:26:18,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-11-23 03:26:18,803 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:26:18,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2021-11-23 03:26:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:19,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:26:19,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387986709] [2021-11-23 03:26:19,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387986709] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:26:19,026 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:26:19,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-23 03:26:19,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492451262] [2021-11-23 03:26:19,027 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:26:19,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:26:19,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:26:19,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:26:19,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=121, Unknown=5, NotChecked=22, Total=182 [2021-11-23 03:26:19,029 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand has 14 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:26:19,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:26:19,797 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2021-11-23 03:26:19,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:26:19,798 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2021-11-23 03:26:19,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:26:19,800 INFO L225 Difference]: With dead ends: 161 [2021-11-23 03:26:19,800 INFO L226 Difference]: Without dead ends: 161 [2021-11-23 03:26:19,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=61, Invalid=178, Unknown=5, NotChecked=28, Total=272 [2021-11-23 03:26:19,801 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 335 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:26:19,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 325 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 173 Invalid, 0 Unknown, 217 Unchecked, 0.6s Time] [2021-11-23 03:26:19,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-23 03:26:19,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 86. [2021-11-23 03:26:19,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 76 states have internal predecessors, (90), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-23 03:26:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2021-11-23 03:26:19,813 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 17 [2021-11-23 03:26:19,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:26:19,813 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2021-11-23 03:26:19,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:26:19,814 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2021-11-23 03:26:19,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:26:19,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:26:19,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:26:19,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:20,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:26:20,028 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:26:20,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:26:20,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2005389781, now seen corresponding path program 1 times [2021-11-23 03:26:20,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:26:20,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412559603] [2021-11-23 03:26:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:20,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:26:20,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:26:20,031 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:26:20,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 03:26:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:20,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:26:20,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:20,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:20,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:26:20,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412559603] [2021-11-23 03:26:20,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412559603] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:26:20,316 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:26:20,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 03:26:20,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108231963] [2021-11-23 03:26:20,317 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:26:20,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:26:20,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:26:20,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:26:20,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:26:20,318 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:26:20,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:26:20,557 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2021-11-23 03:26:20,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:26:20,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-23 03:26:20,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:26:20,559 INFO L225 Difference]: With dead ends: 120 [2021-11-23 03:26:20,559 INFO L226 Difference]: Without dead ends: 114 [2021-11-23 03:26:20,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:26:20,560 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 63 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:26:20,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 316 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 125 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2021-11-23 03:26:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-23 03:26:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2021-11-23 03:26:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.4366197183098592) internal successors, (102), 86 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-23 03:26:20,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2021-11-23 03:26:20,571 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 17 [2021-11-23 03:26:20,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:26:20,571 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2021-11-23 03:26:20,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:26:20,572 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2021-11-23 03:26:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:26:20,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:26:20,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:26:20,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:20,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:26:20,784 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:26:20,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:26:20,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1867537779, now seen corresponding path program 1 times [2021-11-23 03:26:20,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:26:20,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188769034] [2021-11-23 03:26:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:20,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:26:20,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:26:20,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:26:20,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 03:26:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:20,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:26:20,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:26:20,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:26:20,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:26:20,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188769034] [2021-11-23 03:26:20,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188769034] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:26:20,967 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:26:20,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 03:26:20,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081220866] [2021-11-23 03:26:20,967 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:26:20,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:26:20,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:26:20,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:26:20,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:26:20,969 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:26:21,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:26:21,017 INFO L93 Difference]: Finished difference Result 146 states and 162 transitions. [2021-11-23 03:26:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:26:21,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-11-23 03:26:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:26:21,019 INFO L225 Difference]: With dead ends: 146 [2021-11-23 03:26:21,020 INFO L226 Difference]: Without dead ends: 146 [2021-11-23 03:26:21,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:26:21,021 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 89 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:26:21,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 192 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:26:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-23 03:26:21,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2021-11-23 03:26:21,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 90 states have internal predecessors, (106), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-23 03:26:21,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2021-11-23 03:26:21,044 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 23 [2021-11-23 03:26:21,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:26:21,045 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2021-11-23 03:26:21,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:26:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2021-11-23 03:26:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:26:21,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:26:21,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:26:21,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:21,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:26:21,247 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:26:21,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:26:21,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1867478197, now seen corresponding path program 1 times [2021-11-23 03:26:21,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:26:21,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973894152] [2021-11-23 03:26:21,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:21,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:26:21,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:26:21,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:26:21,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 03:26:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:21,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:26:21,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:21,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:26:21,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-23 03:26:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:26:21,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:26:21,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:26:21,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973894152] [2021-11-23 03:26:21,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973894152] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:26:21,495 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:26:21,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-23 03:26:21,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037256158] [2021-11-23 03:26:21,496 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:26:21,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:26:21,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:26:21,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:26:21,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:26:21,497 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:26:21,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:26:21,624 INFO L93 Difference]: Finished difference Result 130 states and 147 transitions. [2021-11-23 03:26:21,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:26:21,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-11-23 03:26:21,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:26:21,626 INFO L225 Difference]: With dead ends: 130 [2021-11-23 03:26:21,626 INFO L226 Difference]: Without dead ends: 130 [2021-11-23 03:26:21,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:26:21,627 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 33 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:26:21,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 333 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:26:21,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-23 03:26:21,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2021-11-23 03:26:21,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.375) internal successors, (99), 87 states have internal predecessors, (99), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-23 03:26:21,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2021-11-23 03:26:21,634 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 23 [2021-11-23 03:26:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:26:21,635 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2021-11-23 03:26:21,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:26:21,635 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2021-11-23 03:26:21,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:26:21,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:26:21,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:26:21,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:21,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:26:21,848 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:26:21,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:26:21,848 INFO L85 PathProgramCache]: Analyzing trace with hash 440766702, now seen corresponding path program 1 times [2021-11-23 03:26:21,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:26:21,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250883697] [2021-11-23 03:26:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:21,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:26:21,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:26:21,849 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:26:21,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 03:26:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:21,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 03:26:21,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:21,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:26:22,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:26:22,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-11-23 03:26:22,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:26:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:22,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:26:24,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:26:24,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250883697] [2021-11-23 03:26:24,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250883697] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:26:24,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [720863608] [2021-11-23 03:26:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:24,465 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:26:24,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:26:24,472 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:26:24,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 03:26:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:24,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 03:26:24,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:24,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:26:24,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:26:24,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-11-23 03:26:24,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:26:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:24,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:26:24,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [720863608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:26:24,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602242369] [2021-11-23 03:26:24,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:24,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:26:24,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:26:24,942 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:26:24,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 03:26:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:24,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:26:25,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:25,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:26:25,201 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-23 03:26:25,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-11-23 03:26:25,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-23 03:26:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:25,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:26:25,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602242369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:26:25,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:26:25,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8, 6, 7, 6] total 13 [2021-11-23 03:26:25,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047796544] [2021-11-23 03:26:25,335 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:26:25,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:26:25,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:26:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:26:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=136, Unknown=1, NotChecked=0, Total=182 [2021-11-23 03:26:25,337 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 14 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 03:26:25,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:26:25,508 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2021-11-23 03:26:25,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:26:25,509 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2021-11-23 03:26:25,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:26:25,510 INFO L225 Difference]: With dead ends: 97 [2021-11-23 03:26:25,510 INFO L226 Difference]: Without dead ends: 97 [2021-11-23 03:26:25,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 120 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=70, Invalid=201, Unknown=1, NotChecked=0, Total=272 [2021-11-23 03:26:25,511 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 154 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:26:25,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 284 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 51 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2021-11-23 03:26:25,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-23 03:26:25,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-23 03:26:25,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 86 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-23 03:26:25,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2021-11-23 03:26:25,525 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 24 [2021-11-23 03:26:25,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:26:25,525 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2021-11-23 03:26:25,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 03:26:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2021-11-23 03:26:25,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:26:25,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:26:25,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:26:25,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:25,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:25,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:26,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:26:26,129 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:26:26,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:26:26,129 INFO L85 PathProgramCache]: Analyzing trace with hash 778865962, now seen corresponding path program 1 times [2021-11-23 03:26:26,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:26:26,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557578456] [2021-11-23 03:26:26,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:26,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:26:26,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:26:26,131 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:26:26,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 03:26:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:26,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 03:26:26,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:26,254 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:26:26,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 22 [2021-11-23 03:26:26,293 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:26:26,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 03:26:26,435 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 03:26:26,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-11-23 03:26:26,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:26:26,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:26:26,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 41 treesize of output 28 [2021-11-23 03:26:27,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-23 03:26:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:27,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:26:28,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:26:28,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557578456] [2021-11-23 03:26:28,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557578456] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:26:28,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1189854649] [2021-11-23 03:26:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:28,656 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:26:28,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:26:28,656 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:26:28,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 03:26:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:28,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 03:26:28,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:28,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 03:26:31,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:26:31,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-11-23 03:26:31,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:26:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:31,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:26:31,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1189854649] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:26:31,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123568139] [2021-11-23 03:26:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:31,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:26:31,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:26:31,533 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:26:31,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 03:26:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:31,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:26:31,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:31,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 03:26:32,026 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-23 03:26:32,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-11-23 03:26:32,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-23 03:26:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:32,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:26:32,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123568139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:26:32,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:26:32,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 8, 6, 7, 6] total 22 [2021-11-23 03:26:32,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839388763] [2021-11-23 03:26:32,221 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:26:32,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 03:26:32,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:26:32,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 03:26:32,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=417, Unknown=1, NotChecked=0, Total=506 [2021-11-23 03:26:32,223 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 23 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 03:26:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:26:35,364 INFO L93 Difference]: Finished difference Result 185 states and 203 transitions. [2021-11-23 03:26:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:26:35,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 25 [2021-11-23 03:26:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:26:35,368 INFO L225 Difference]: With dead ends: 185 [2021-11-23 03:26:35,368 INFO L226 Difference]: Without dead ends: 185 [2021-11-23 03:26:35,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 117 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=136, Invalid=619, Unknown=1, NotChecked=0, Total=756 [2021-11-23 03:26:35,370 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 183 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:26:35,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 787 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 365 Invalid, 0 Unknown, 85 Unchecked, 0.8s Time] [2021-11-23 03:26:35,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-23 03:26:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 114. [2021-11-23 03:26:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 86 states have (on average 1.3372093023255813) internal successors, (115), 101 states have internal predecessors, (115), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-23 03:26:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2021-11-23 03:26:35,382 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 25 [2021-11-23 03:26:35,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:26:35,383 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2021-11-23 03:26:35,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 03:26:35,383 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2021-11-23 03:26:35,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:26:35,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:26:35,388 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:26:35,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:35,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-23 03:26:35,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:35,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:26:35,991 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:26:35,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:26:35,991 INFO L85 PathProgramCache]: Analyzing trace with hash 990216875, now seen corresponding path program 1 times [2021-11-23 03:26:35,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:26:35,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67400532] [2021-11-23 03:26:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:35,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:26:35,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:26:35,993 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:26:35,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 03:26:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:36,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:26:36,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:36,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:26:36,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:26:36,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-23 03:26:36,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-23 03:26:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:36,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:26:36,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:26:36,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67400532] [2021-11-23 03:26:36,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67400532] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:26:36,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:26:36,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-23 03:26:36,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113972243] [2021-11-23 03:26:36,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:26:36,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:26:36,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:26:36,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:26:36,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:26:36,463 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:26:36,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:26:36,624 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2021-11-23 03:26:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:26:36,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-11-23 03:26:36,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:26:36,625 INFO L225 Difference]: With dead ends: 92 [2021-11-23 03:26:36,626 INFO L226 Difference]: Without dead ends: 86 [2021-11-23 03:26:36,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:26:36,626 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 2 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:26:36,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 321 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:26:36,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-23 03:26:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-23 03:26:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 76 states have internal predecessors, (85), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 03:26:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2021-11-23 03:26:36,636 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 25 [2021-11-23 03:26:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:26:36,639 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2021-11-23 03:26:36,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:26:36,639 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2021-11-23 03:26:36,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:26:36,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:26:36,644 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:26:36,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:36,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:26:36,844 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting f19_undoErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:26:36,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:26:36,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1765484354, now seen corresponding path program 1 times [2021-11-23 03:26:36,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:26:36,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864925693] [2021-11-23 03:26:36,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:36,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:26:36,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:26:36,846 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:26:36,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 03:26:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:36,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:26:36,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:26:37,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:37,096 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:26:37,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2021-11-23 03:26:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:26:37,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:26:37,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864925693] [2021-11-23 03:26:37,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864925693] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:26:37,128 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:26:37,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 03:26:37,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864947670] [2021-11-23 03:26:37,129 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:26:37,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:26:37,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:26:37,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:26:37,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:26:37,130 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:26:37,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:26:37,403 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2021-11-23 03:26:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:26:37,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-23 03:26:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:26:37,404 INFO L225 Difference]: With dead ends: 107 [2021-11-23 03:26:37,405 INFO L226 Difference]: Without dead ends: 107 [2021-11-23 03:26:37,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:26:37,406 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 89 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:26:37,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 152 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:26:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-23 03:26:37,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 88. [2021-11-23 03:26:37,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.375) internal successors, (88), 77 states have internal predecessors, (88), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 03:26:37,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2021-11-23 03:26:37,412 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 27 [2021-11-23 03:26:37,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:26:37,412 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2021-11-23 03:26:37,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:26:37,413 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2021-11-23 03:26:37,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:26:37,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:26:37,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:26:37,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-23 03:26:37,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:26:37,627 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting f19_undoErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:26:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:26:37,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1765484353, now seen corresponding path program 1 times [2021-11-23 03:26:37,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:26:37,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839887712] [2021-11-23 03:26:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:37,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:26:37,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:26:37,629 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:26:37,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 03:26:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:37,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 03:26:37,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:26:37,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:38,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:26:38,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-11-23 03:26:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:26:38,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:26:38,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839887712] [2021-11-23 03:26:38,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839887712] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:26:38,668 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:26:38,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-23 03:26:38,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108569991] [2021-11-23 03:26:38,668 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:26:38,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:26:38,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:26:38,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:26:38,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:26:38,670 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:26:39,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:26:39,041 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2021-11-23 03:26:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:26:39,042 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2021-11-23 03:26:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:26:39,043 INFO L225 Difference]: With dead ends: 96 [2021-11-23 03:26:39,043 INFO L226 Difference]: Without dead ends: 96 [2021-11-23 03:26:39,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:26:39,045 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 220 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:26:39,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 166 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:26:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-23 03:26:39,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2021-11-23 03:26:39,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.3823529411764706) internal successors, (94), 82 states have internal predecessors, (94), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 03:26:39,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2021-11-23 03:26:39,049 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 27 [2021-11-23 03:26:39,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:26:39,050 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2021-11-23 03:26:39,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:26:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2021-11-23 03:26:39,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:26:39,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:26:39,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:26:39,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:39,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:26:39,262 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:26:39,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:26:39,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1624958864, now seen corresponding path program 1 times [2021-11-23 03:26:39,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:26:39,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22995252] [2021-11-23 03:26:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:39,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:26:39,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:26:39,265 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:26:39,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 03:26:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:39,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 03:26:39,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:39,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:26:39,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:26:39,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-11-23 03:26:39,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:26:39,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 32 treesize of output 31 [2021-11-23 03:26:39,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-11-23 03:26:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:39,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:42,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:26:42,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22995252] [2021-11-23 03:26:42,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22995252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:26:42,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [288612006] [2021-11-23 03:26:42,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:42,942 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:26:42,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:26:42,942 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:26:42,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 03:26:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:43,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 03:26:43,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:43,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:26:43,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:26:43,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-11-23 03:26:43,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:26:43,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 34 [2021-11-23 03:26:43,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-11-23 03:26:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:43,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:43,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [288612006] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:26:43,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535562482] [2021-11-23 03:26:43,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:43,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:26:43,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:26:43,729 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:26:43,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 03:26:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:43,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:26:43,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:43,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:26:43,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-11-23 03:26:44,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-23 03:26:45,041 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-23 03:26:45,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 34 [2021-11-23 03:26:45,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-23 03:26:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:45,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:47,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535562482] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:26:47,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:26:47,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 7, 7] total 13 [2021-11-23 03:26:47,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645884162] [2021-11-23 03:26:47,542 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:26:47,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:26:47,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:26:47,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:26:47,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2021-11-23 03:26:47,543 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 14 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 03:26:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:26:48,033 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2021-11-23 03:26:48,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:26:48,034 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 26 [2021-11-23 03:26:48,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:26:48,035 INFO L225 Difference]: With dead ends: 105 [2021-11-23 03:26:48,035 INFO L226 Difference]: Without dead ends: 105 [2021-11-23 03:26:48,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 103 SyntacticMatches, 35 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=53, Invalid=186, Unknown=1, NotChecked=0, Total=240 [2021-11-23 03:26:48,036 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 122 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:26:48,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 443 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 225 Invalid, 0 Unknown, 63 Unchecked, 0.4s Time] [2021-11-23 03:26:48,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-23 03:26:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2021-11-23 03:26:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.3676470588235294) internal successors, (93), 82 states have internal predecessors, (93), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 03:26:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2021-11-23 03:26:48,041 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 26 [2021-11-23 03:26:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:26:48,041 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2021-11-23 03:26:48,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 03:26:48,042 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2021-11-23 03:26:48,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:26:48,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:26:48,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:26:48,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:48,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:48,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:48,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:26:48,645 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:26:48,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:26:48,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1765464909, now seen corresponding path program 1 times [2021-11-23 03:26:48,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:26:48,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44016431] [2021-11-23 03:26:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:48,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:26:48,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:26:48,647 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:26:48,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 03:26:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:48,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:26:48,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:26:48,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:48,887 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:26:48,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2021-11-23 03:26:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:26:48,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:26:48,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44016431] [2021-11-23 03:26:48,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44016431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:26:48,939 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:26:48,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 03:26:48,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974199811] [2021-11-23 03:26:48,939 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:26:48,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:26:48,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:26:48,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:26:48,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:26:48,940 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:26:49,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:26:49,193 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2021-11-23 03:26:49,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:26:49,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-23 03:26:49,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:26:49,194 INFO L225 Difference]: With dead ends: 104 [2021-11-23 03:26:49,194 INFO L226 Difference]: Without dead ends: 104 [2021-11-23 03:26:49,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:26:49,194 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 117 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:26:49,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 148 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:26:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-23 03:26:49,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2021-11-23 03:26:49,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.380281690140845) internal successors, (98), 85 states have internal predecessors, (98), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 03:26:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2021-11-23 03:26:49,199 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 27 [2021-11-23 03:26:49,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:26:49,199 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2021-11-23 03:26:49,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:26:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2021-11-23 03:26:49,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:26:49,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:26:49,201 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:26:49,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 03:26:49,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:26:49,412 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:26:49,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:26:49,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1765464908, now seen corresponding path program 1 times [2021-11-23 03:26:49,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:26:49,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233298616] [2021-11-23 03:26:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:26:49,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:26:49,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:26:49,414 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:26:49,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 03:26:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:26:49,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 03:26:49,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:26:51,833 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:26:51,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 37 [2021-11-23 03:26:51,847 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:26:51,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-11-23 03:26:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:26:52,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:26:59,025 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_9| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~#a19~0#1.offset_BEFORE_CALL_3| (_ BitVec 32)) (|v_ldv_malloc_#res.base_143| (_ BitVec 32))) (or (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_entry_point_~#a19~0#1.offset_BEFORE_CALL_3|) (select (store |c_#length| |v_ldv_malloc_#res.base_143| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_9|))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~#a19~0#1.offset_BEFORE_CALL_3|) (bvadd (_ bv8 32) |v_ULTIMATE.start_entry_point_~#a19~0#1.offset_BEFORE_CALL_3|))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_143|)))) (exists ((|v_ldv_malloc_#res.base_142| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_142|))))))) (or (exists ((v_ldv_malloc_~size_130 (_ BitVec 32))) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_entry_point_~#a19~0#1.offset_BEFORE_CALL_3|) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_142| v_ldv_malloc_~size_130) |v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_9|)))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~#a19~0#1.offset_BEFORE_CALL_3|) (bvadd (_ bv8 32) |v_ULTIMATE.start_entry_point_~#a19~0#1.offset_BEFORE_CALL_3|)))))))) is different from true [2021-11-23 03:27:00,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:27:00,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 62 [2021-11-23 03:27:00,052 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:27:00,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 61 [2021-11-23 03:27:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:27:00,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:27:00,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233298616] [2021-11-23 03:27:00,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233298616] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:27:00,532 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:27:00,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 14 [2021-11-23 03:27:00,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50471768] [2021-11-23 03:27:00,533 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:27:00,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:27:00,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:27:00,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:27:00,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=145, Unknown=3, NotChecked=24, Total=210 [2021-11-23 03:27:00,534 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand has 15 states, 13 states have (on average 3.230769230769231) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:27:01,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:27:01,880 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2021-11-23 03:27:01,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:27:01,881 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.230769230769231) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2021-11-23 03:27:01,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:27:01,883 INFO L225 Difference]: With dead ends: 127 [2021-11-23 03:27:01,883 INFO L226 Difference]: Without dead ends: 127 [2021-11-23 03:27:01,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=85, Invalid=258, Unknown=3, NotChecked=34, Total=380 [2021-11-23 03:27:01,884 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 119 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:27:01,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 411 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 295 Invalid, 0 Unknown, 245 Unchecked, 1.0s Time] [2021-11-23 03:27:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-23 03:27:01,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 95. [2021-11-23 03:27:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 84 states have internal predecessors, (95), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 03:27:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2021-11-23 03:27:01,890 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 27 [2021-11-23 03:27:01,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:27:01,890 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2021-11-23 03:27:01,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.230769230769231) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:27:01,891 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2021-11-23 03:27:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:27:01,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:27:01,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:27:01,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 03:27:02,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:27:02,105 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:27:02,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:27:02,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1104559937, now seen corresponding path program 1 times [2021-11-23 03:27:02,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:27:02,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072783026] [2021-11-23 03:27:02,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:02,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:27:02,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:27:02,107 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:27:02,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 03:27:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:02,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 03:27:02,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:27:02,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:27:02,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:27:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:27:02,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:27:02,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-23 03:27:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:27:02,471 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:27:02,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072783026] [2021-11-23 03:27:02,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072783026] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:27:02,472 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:27:02,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-23 03:27:02,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922368099] [2021-11-23 03:27:02,472 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:27:02,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:27:02,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:27:02,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:27:02,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:27:02,473 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:27:02,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:27:02,745 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2021-11-23 03:27:02,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:27:02,746 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-23 03:27:02,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:27:02,747 INFO L225 Difference]: With dead ends: 97 [2021-11-23 03:27:02,747 INFO L226 Difference]: Without dead ends: 97 [2021-11-23 03:27:02,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:27:02,748 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 85 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:27:02,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 313 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:27:02,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-23 03:27:02,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-11-23 03:27:02,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 71 states have (on average 1.323943661971831) internal successors, (94), 84 states have internal predecessors, (94), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 03:27:02,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2021-11-23 03:27:02,753 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 28 [2021-11-23 03:27:02,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:27:02,754 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2021-11-23 03:27:02,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:27:02,754 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2021-11-23 03:27:02,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:27:02,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:27:02,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:27:02,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 03:27:02,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:27:02,967 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:27:02,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:27:02,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1105162709, now seen corresponding path program 1 times [2021-11-23 03:27:02,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:27:02,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235263297] [2021-11-23 03:27:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:02,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:27:02,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:27:02,969 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:27:02,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 03:27:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:03,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 03:27:03,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:27:03,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:27:03,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:27:03,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-11-23 03:27:03,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:27:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:27:03,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:27:07,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 194 [2021-11-23 03:27:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:27:08,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:27:08,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235263297] [2021-11-23 03:27:08,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235263297] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:27:08,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1077325646] [2021-11-23 03:27:08,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:08,166 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:27:08,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:27:08,168 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:27:08,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-23 03:27:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:08,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 03:27:08,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:27:08,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:27:08,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:27:08,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-11-23 03:27:08,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:27:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:27:08,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:27:08,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 194 [2021-11-23 03:27:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:27:08,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1077325646] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:27:08,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471870189] [2021-11-23 03:27:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:08,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:27:08,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:27:08,873 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:27:08,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 03:27:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:08,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 03:27:08,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:27:09,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:27:09,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:27:09,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-11-23 03:27:09,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:27:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:27:09,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:27:09,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 194 [2021-11-23 03:27:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:27:09,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471870189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:27:09,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:27:09,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10, 9, 10, 9] total 16 [2021-11-23 03:27:09,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825741597] [2021-11-23 03:27:09,541 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:27:09,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:27:09,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:27:09,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:27:09,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=218, Unknown=2, NotChecked=0, Total=272 [2021-11-23 03:27:09,543 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 17 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:27:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:27:09,930 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-11-23 03:27:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:27:09,931 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2021-11-23 03:27:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:27:09,931 INFO L225 Difference]: With dead ends: 98 [2021-11-23 03:27:09,932 INFO L226 Difference]: Without dead ends: 98 [2021-11-23 03:27:09,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=98, Invalid=362, Unknown=2, NotChecked=0, Total=462 [2021-11-23 03:27:09,933 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 73 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:27:09,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 337 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 89 Invalid, 0 Unknown, 21 Unchecked, 0.2s Time] [2021-11-23 03:27:09,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-23 03:27:09,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2021-11-23 03:27:09,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.3098591549295775) internal successors, (93), 83 states have internal predecessors, (93), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 03:27:09,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-11-23 03:27:09,937 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 28 [2021-11-23 03:27:09,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:27:09,938 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-11-23 03:27:09,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:27:09,938 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-11-23 03:27:09,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 03:27:09,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:27:09,939 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:27:09,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 03:27:10,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-23 03:27:10,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-23 03:27:10,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:27:10,540 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:27:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:27:10,540 INFO L85 PathProgramCache]: Analyzing trace with hash -118380194, now seen corresponding path program 1 times [2021-11-23 03:27:10,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:27:10,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112320052] [2021-11-23 03:27:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:10,541 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:27:10,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:27:10,541 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:27:10,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 03:27:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:10,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 03:27:10,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:27:10,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 03:27:11,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:27:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:27:11,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:27:11,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-23 03:27:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:27:11,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:27:11,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112320052] [2021-11-23 03:27:11,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112320052] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:27:11,800 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:27:11,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 17 [2021-11-23 03:27:11,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714553175] [2021-11-23 03:27:11,800 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:27:11,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:27:11,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:27:11,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:27:11,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:27:11,802 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:27:11,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:27:11,943 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-11-23 03:27:11,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:27:11,944 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2021-11-23 03:27:11,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:27:11,945 INFO L225 Difference]: With dead ends: 109 [2021-11-23 03:27:11,945 INFO L226 Difference]: Without dead ends: 109 [2021-11-23 03:27:11,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:27:11,946 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 46 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:27:11,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 413 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2021-11-23 03:27:11,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-23 03:27:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2021-11-23 03:27:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.2933333333333332) internal successors, (97), 86 states have internal predecessors, (97), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 03:27:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2021-11-23 03:27:11,950 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 29 [2021-11-23 03:27:11,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:27:11,951 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2021-11-23 03:27:11,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:27:11,951 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2021-11-23 03:27:11,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 03:27:11,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:27:11,952 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:27:11,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 03:27:12,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:27:12,164 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:27:12,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:27:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash -628914371, now seen corresponding path program 1 times [2021-11-23 03:27:12,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:27:12,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794957338] [2021-11-23 03:27:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:12,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:27:12,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:27:12,166 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:27:12,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 03:27:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:12,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:27:12,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:27:12,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:27:12,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:27:12,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-23 03:27:12,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-23 03:27:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:27:12,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:27:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:27:12,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:27:12,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794957338] [2021-11-23 03:27:12,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794957338] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:27:12,514 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:27:12,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-23 03:27:12,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320881743] [2021-11-23 03:27:12,515 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:27:12,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:27:12,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:27:12,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:27:12,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:27:12,516 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:27:12,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:27:12,650 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2021-11-23 03:27:12,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:27:12,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-11-23 03:27:12,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:27:12,659 INFO L225 Difference]: With dead ends: 118 [2021-11-23 03:27:12,659 INFO L226 Difference]: Without dead ends: 118 [2021-11-23 03:27:12,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:27:12,660 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 29 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:27:12,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 379 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:27:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-23 03:27:12,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 96. [2021-11-23 03:27:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 84 states have internal predecessors, (94), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 03:27:12,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-11-23 03:27:12,664 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 29 [2021-11-23 03:27:12,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:27:12,665 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-11-23 03:27:12,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:27:12,665 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-11-23 03:27:12,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 03:27:12,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:27:12,666 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:27:12,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 03:27:12,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:27:12,878 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:27:12,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:27:12,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1021941381, now seen corresponding path program 1 times [2021-11-23 03:27:12,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:27:12,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884501729] [2021-11-23 03:27:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:12,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:27:12,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:27:12,879 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:27:12,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 03:27:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:12,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:27:12,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:27:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:27:13,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:27:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:27:13,088 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:27:13,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884501729] [2021-11-23 03:27:13,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884501729] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:27:13,088 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:27:13,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 03:27:13,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84151410] [2021-11-23 03:27:13,089 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:27:13,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:27:13,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:27:13,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:27:13,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:27:13,090 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:27:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:27:13,128 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2021-11-23 03:27:13,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:27:13,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-11-23 03:27:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:27:13,130 INFO L225 Difference]: With dead ends: 90 [2021-11-23 03:27:13,130 INFO L226 Difference]: Without dead ends: 90 [2021-11-23 03:27:13,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:27:13,131 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 62 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:27:13,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 171 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:27:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-23 03:27:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-11-23 03:27:13,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.265625) internal successors, (81), 76 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:27:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2021-11-23 03:27:13,135 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 29 [2021-11-23 03:27:13,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:27:13,135 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2021-11-23 03:27:13,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:27:13,136 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2021-11-23 03:27:13,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 03:27:13,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:27:13,136 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:27:13,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 03:27:13,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:27:13,343 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:27:13,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:27:13,343 INFO L85 PathProgramCache]: Analyzing trace with hash -99262379, now seen corresponding path program 1 times [2021-11-23 03:27:13,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:27:13,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343283610] [2021-11-23 03:27:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:13,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:27:13,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:27:13,344 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:27:13,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 03:27:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:13,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:27:13,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:27:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:27:13,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:27:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:27:13,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:27:13,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343283610] [2021-11-23 03:27:13,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343283610] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:27:13,489 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:27:13,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 03:27:13,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366144830] [2021-11-23 03:27:13,489 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:27:13,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:27:13,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:27:13,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:27:13,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:27:13,490 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:27:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:27:13,530 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2021-11-23 03:27:13,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:27:13,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-11-23 03:27:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:27:13,532 INFO L225 Difference]: With dead ends: 101 [2021-11-23 03:27:13,532 INFO L226 Difference]: Without dead ends: 101 [2021-11-23 03:27:13,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:27:13,533 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 34 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:27:13,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 177 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:27:13,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-23 03:27:13,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2021-11-23 03:27:13,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.25) internal successors, (80), 76 states have internal predecessors, (80), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:27:13,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2021-11-23 03:27:13,537 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 29 [2021-11-23 03:27:13,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:27:13,538 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2021-11-23 03:27:13,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:27:13,538 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2021-11-23 03:27:13,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 03:27:13,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:27:13,539 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:27:13,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 03:27:13,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:27:13,751 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:27:13,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:27:13,751 INFO L85 PathProgramCache]: Analyzing trace with hash -99694285, now seen corresponding path program 1 times [2021-11-23 03:27:13,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:27:13,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75987032] [2021-11-23 03:27:13,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:13,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:27:13,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:27:13,752 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:27:13,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 03:27:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:13,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 03:27:13,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:27:13,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 03:27:14,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:27:14,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-11-23 03:27:14,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:27:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:27:14,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:27:21,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 194 [2021-11-23 03:27:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:27:21,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:27:21,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75987032] [2021-11-23 03:27:21,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75987032] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:27:21,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1935599455] [2021-11-23 03:27:21,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:21,913 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:27:21,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:27:21,918 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:27:21,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-23 03:27:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:22,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 03:27:22,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:27:22,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 03:27:22,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:27:22,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-11-23 03:27:22,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:27:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:27:22,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:27:22,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 194 [2021-11-23 03:27:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:27:23,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1935599455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:27:23,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462321665] [2021-11-23 03:27:23,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:23,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:27:23,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:27:23,004 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:27:23,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 03:27:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:23,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 03:27:23,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:27:23,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 03:27:23,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:27:23,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-11-23 03:27:23,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:27:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:27:23,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:27:23,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 194 [2021-11-23 03:27:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:27:23,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462321665] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:27:23,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:27:23,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10, 9, 10, 9] total 16 [2021-11-23 03:27:23,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701979271] [2021-11-23 03:27:23,772 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:27:23,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:27:23,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:27:23,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:27:23,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=218, Unknown=3, NotChecked=0, Total=272 [2021-11-23 03:27:23,774 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 17 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:27:24,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:27:24,657 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2021-11-23 03:27:24,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:27:24,658 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2021-11-23 03:27:24,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:27:24,659 INFO L225 Difference]: With dead ends: 89 [2021-11-23 03:27:24,659 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 03:27:24,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=97, Invalid=362, Unknown=3, NotChecked=0, Total=462 [2021-11-23 03:27:24,660 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 69 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:27:24,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 454 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 237 Invalid, 0 Unknown, 43 Unchecked, 0.6s Time] [2021-11-23 03:27:24,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 03:27:24,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2021-11-23 03:27:24,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 64 states have (on average 1.234375) internal successors, (79), 75 states have internal predecessors, (79), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:27:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-11-23 03:27:24,664 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 29 [2021-11-23 03:27:24,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:27:24,665 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-11-23 03:27:24,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:27:24,665 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-11-23 03:27:24,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 03:27:24,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:27:24,666 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:27:24,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 03:27:24,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-23 03:27:25,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-23 03:27:25,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:27:25,267 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting f19_undoErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:27:25,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:27:25,267 INFO L85 PathProgramCache]: Analyzing trace with hash 625181411, now seen corresponding path program 1 times [2021-11-23 03:27:25,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:27:25,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966863999] [2021-11-23 03:27:25,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:25,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:27:25,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:27:25,268 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:27:25,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 03:27:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:25,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 03:27:25,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:27:25,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:27:25,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-23 03:27:25,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-23 03:27:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:27:25,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:27:25,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-23 03:27:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:27:25,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:27:25,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966863999] [2021-11-23 03:27:25,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966863999] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:27:25,826 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:27:25,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-11-23 03:27:25,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233346141] [2021-11-23 03:27:25,827 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:27:25,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:27:25,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:27:25,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:27:25,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:27:25,827 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:27:26,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:27:26,239 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2021-11-23 03:27:26,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:27:26,240 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-11-23 03:27:26,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:27:26,241 INFO L225 Difference]: With dead ends: 89 [2021-11-23 03:27:26,241 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 03:27:26,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:27:26,242 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 59 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:27:26,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 262 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 161 Invalid, 0 Unknown, 31 Unchecked, 0.3s Time] [2021-11-23 03:27:26,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 03:27:26,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2021-11-23 03:27:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 64 states have (on average 1.21875) internal successors, (78), 75 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:27:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2021-11-23 03:27:26,246 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 30 [2021-11-23 03:27:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:27:26,246 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2021-11-23 03:27:26,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:27:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2021-11-23 03:27:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 03:27:26,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:27:26,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:27:26,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-23 03:27:26,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:27:26,459 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:27:26,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:27:26,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1204444567, now seen corresponding path program 1 times [2021-11-23 03:27:26,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:27:26,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429347521] [2021-11-23 03:27:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:27:26,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:27:26,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:27:26,460 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:27:26,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 03:27:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:27:26,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 03:27:26,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:27:26,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:27:26,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:27:26,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-11-23 03:27:26,898 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-11-23 03:27:26,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 49 [2021-11-23 03:27:26,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:27:26,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 55 treesize of output 48 [2021-11-23 03:27:27,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2021-11-23 03:27:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:27:27,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:28:18,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 317 treesize of output 305 [2021-11-23 03:28:28,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:28:28,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 136 [2021-11-23 03:28:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:28:31,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:28:31,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429347521] [2021-11-23 03:28:31,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429347521] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:28:31,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1687439012] [2021-11-23 03:28:31,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:31,674 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:28:31,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:28:31,677 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:28:31,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-23 03:28:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:28:31,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 03:28:31,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:28:31,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:28:31,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:28:32,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-11-23 03:28:38,219 INFO L354 Elim1Store]: treesize reduction 30, result has 31.8 percent of original size [2021-11-23 03:28:38,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 32 [2021-11-23 03:28:38,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:28:38,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 33 [2021-11-23 03:28:39,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-23 03:28:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:28:39,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:29:31,518 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_41| (_ BitVec 32)) (|ULTIMATE.start_f19_#t~ret38#1.base| (_ BitVec 32)) (|v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_44| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~#a19~0#1.offset_BEFORE_CALL_35| (_ BitVec 32)) (|v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_50| (_ BitVec 32)) (|v_ldv_malloc_#res.base_240| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_240| (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_50| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_50|) |v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_44| |ULTIMATE.start_f19_#t~ret38#1.base|)) |v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_41|) (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~#a19~0#1.offset_BEFORE_CALL_35|))))))) (_ bv1 1))) (exists ((|ULTIMATE.start_f19_#t~ret38#1.base| (_ BitVec 32)) (|v_ldv_malloc_#res.base_239| (_ BitVec 32))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ldv_malloc_#res.base_239| (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_50| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_50|) |v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_44| |ULTIMATE.start_f19_#t~ret38#1.base|)) |v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_41|) (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~#a19~0#1.offset_BEFORE_CALL_35|)))))))) (_ bv1 1))))))) is different from false [2021-11-23 03:29:40,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 302 treesize of output 290 [2021-11-23 03:29:45,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:29:45,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 110 [2021-11-23 03:29:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:29:45,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1687439012] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:29:45,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092774609] [2021-11-23 03:29:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:29:45,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:29:45,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:29:45,825 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:29:45,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-23 03:29:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:29:45,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:29:45,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:29:45,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:29:45,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:29:46,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-11-23 03:29:46,133 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-11-23 03:29:46,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 50 [2021-11-23 03:29:46,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:29:46,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 57 treesize of output 50 [2021-11-23 03:29:46,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2021-11-23 03:29:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:29:46,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:30:30,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 317 treesize of output 305 [2021-11-23 03:30:40,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:30:40,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 133 [2021-11-23 03:30:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:30:40,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092774609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:30:40,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:30:40,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11, 12, 12, 12] total 31 [2021-11-23 03:30:40,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112198394] [2021-11-23 03:30:40,615 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:30:40,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 03:30:40,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:30:40,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 03:30:40,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=775, Unknown=54, NotChecked=58, Total=992 [2021-11-23 03:30:40,617 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 32 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 27 states have internal predecessors, (70), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-23 03:30:45,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:45,459 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2021-11-23 03:30:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:30:45,460 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 27 states have internal predecessors, (70), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 30 [2021-11-23 03:30:45,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:45,461 INFO L225 Difference]: With dead ends: 89 [2021-11-23 03:30:45,461 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 03:30:45,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 129 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 191.2s TimeCoverageRelationStatistics Valid=139, Invalid=933, Unknown=54, NotChecked=64, Total=1190 [2021-11-23 03:30:45,462 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 51 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:30:45,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 600 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 89 Invalid, 0 Unknown, 324 Unchecked, 0.2s Time] [2021-11-23 03:30:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 03:30:45,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-11-23 03:30:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.208955223880597) internal successors, (81), 78 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:30:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-11-23 03:30:45,467 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 30 [2021-11-23 03:30:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:45,467 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-11-23 03:30:45,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 27 states have internal predecessors, (70), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-23 03:30:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-11-23 03:30:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 03:30:45,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:45,468 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:30:45,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2021-11-23 03:30:45,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-23 03:30:45,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-23 03:30:46,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:30:46,071 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting f19_undoErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:30:46,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:46,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1451440213, now seen corresponding path program 1 times [2021-11-23 03:30:46,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:30:46,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253749572] [2021-11-23 03:30:46,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:46,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:30:46,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:30:46,073 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:30:46,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 03:30:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:46,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 03:30:46,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:30:46,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:30:46,276 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:30:46,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 03:30:46,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:30:48,475 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_53| (_ BitVec 32))) (not (= |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_53| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_53|) (_ bv4 32))))) is different from true [2021-11-23 03:30:48,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:30:52,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:30:52,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 21 [2021-11-23 03:30:52,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-23 03:30:55,001 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:30:55,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 26 [2021-11-23 03:31:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 03:31:01,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:31:14,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:31:14,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 62 [2021-11-23 03:31:14,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:14,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 62 [2021-11-23 03:31:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:17,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:31:17,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253749572] [2021-11-23 03:31:17,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253749572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:31:17,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [950735926] [2021-11-23 03:31:17,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:17,394 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:31:17,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:31:17,395 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:31:17,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-23 03:31:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:17,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 03:31:17,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:31:24,390 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:31:24,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 27 [2021-11-23 03:31:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:31:30,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:31:35,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:31:35,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2021-11-23 03:31:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:31:35,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [950735926] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:35,791 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:31:35,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 9] imperfect sequences [16, 14] total 40 [2021-11-23 03:31:35,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87251578] [2021-11-23 03:31:35,792 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:35,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:31:35,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:31:35,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:31:35,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1428, Unknown=19, NotChecked=76, Total=1640 [2021-11-23 03:31:35,794 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 19 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:31:53,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:53,250 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2021-11-23 03:31:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:31:53,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2021-11-23 03:31:53,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:53,251 INFO L225 Difference]: With dead ends: 101 [2021-11-23 03:31:53,251 INFO L226 Difference]: Without dead ends: 101 [2021-11-23 03:31:53,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 64.3s TimeCoverageRelationStatistics Valid=208, Invalid=2121, Unknown=27, NotChecked=94, Total=2450 [2021-11-23 03:31:53,252 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 227 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:53,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 322 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 290 Invalid, 0 Unknown, 94 Unchecked, 0.7s Time] [2021-11-23 03:31:53,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-23 03:31:53,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2021-11-23 03:31:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 80 states have internal predecessors, (84), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 03:31:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2021-11-23 03:31:53,263 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 33 [2021-11-23 03:31:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:53,264 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2021-11-23 03:31:53,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:31:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2021-11-23 03:31:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 03:31:53,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:53,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:53,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-23 03:31:53,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-23 03:31:53,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 03:31:53,677 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting f19_undoErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:31:53,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:53,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1451440214, now seen corresponding path program 1 times [2021-11-23 03:31:53,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:31:53,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252562804] [2021-11-23 03:31:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:53,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:31:53,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:31:53,679 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:31:53,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-23 03:31:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:53,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 03:31:53,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:31:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:31:54,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:31:54,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:31:54,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-11-23 03:31:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:31:54,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:31:54,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252562804] [2021-11-23 03:31:54,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252562804] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:54,979 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:54,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-23 03:31:54,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131814515] [2021-11-23 03:31:54,979 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:54,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:31:54,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:31:54,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:31:54,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:31:54,980 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:31:55,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:55,884 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2021-11-23 03:31:55,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:31:55,885 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2021-11-23 03:31:55,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:55,886 INFO L225 Difference]: With dead ends: 94 [2021-11-23 03:31:55,886 INFO L226 Difference]: Without dead ends: 94 [2021-11-23 03:31:55,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:31:55,887 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 118 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:55,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 316 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:31:55,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-23 03:31:55,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2021-11-23 03:31:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 79 states have internal predecessors, (82), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 03:31:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2021-11-23 03:31:55,891 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 33 [2021-11-23 03:31:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:55,892 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2021-11-23 03:31:55,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:31:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2021-11-23 03:31:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 03:31:55,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:55,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:55,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-23 03:31:56,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:31:56,104 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:31:56,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:56,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1801348875, now seen corresponding path program 1 times [2021-11-23 03:31:56,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:31:56,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807476399] [2021-11-23 03:31:56,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:56,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:31:56,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:31:56,107 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:31:56,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 03:31:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:56,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 03:31:56,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:31:56,401 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 03:31:56,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-11-23 03:31:56,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:31:56,705 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 03:31:56,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-23 03:32:06,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:32:06,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 44 [2021-11-23 03:32:07,009 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-23 03:32:07,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 47 [2021-11-23 03:32:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:07,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:32:09,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-11-23 03:32:34,439 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_probe_unsafe_19_~a#1.base_BEFORE_CALL_69| (_ BitVec 32)) (|v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_52| (_ BitVec 32)) (|v_ULTIMATE.start_probe_unsafe_19_~a#1.offset_BEFORE_CALL_70| (_ BitVec 32)) (|v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_60| (_ BitVec 32)) (|v_ldv_malloc_#res.base_275| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_275|)))) (exists ((|v_ULTIMATE.start_f19_#t~ret38#1.base_139| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_f19_#t~ret38#1.base_139| (_ bv1 1)) |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_60|)))) (_ bv1 1))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_f19_#t~ret38#1.base_139|))))) (or (not (= |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_60| |v_ULTIMATE.start_probe_unsafe_19_~a#1.base_BEFORE_CALL_69|)) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_f19_#t~ret38#1.base_139| (_ bv0 1)) |v_ULTIMATE.start_probe_unsafe_19_~a#1.base_BEFORE_CALL_69|))))))) (not (= |v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_52| |v_ULTIMATE.start_probe_unsafe_19_~a#1.offset_BEFORE_CALL_70|))))) (and (= |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_60| |v_ULTIMATE.start_probe_unsafe_19_~a#1.base_BEFORE_CALL_69|) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_275| (_ bv0 1)) |v_ULTIMATE.start_probe_unsafe_19_~a#1.base_BEFORE_CALL_69|)))) (_ bv1 1))) (= |v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_52| |v_ULTIMATE.start_probe_unsafe_19_~a#1.offset_BEFORE_CALL_70|)) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_275| (_ bv1 1)) |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_60|))) (_ bv1 1)))))) is different from false [2021-11-23 03:32:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:37,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:32:37,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807476399] [2021-11-23 03:32:37,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807476399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:37,720 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:37,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 10] imperfect sequences [] total 20 [2021-11-23 03:32:37,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347734245] [2021-11-23 03:32:37,721 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:37,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 03:32:37,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:32:37,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 03:32:37,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=311, Unknown=7, NotChecked=36, Total=420 [2021-11-23 03:32:37,722 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 03:32:39,852 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (forall ((|v_ULTIMATE.start_probe_unsafe_19_~a#1.base_BEFORE_CALL_69| (_ BitVec 32)) (|v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_52| (_ BitVec 32)) (|v_ULTIMATE.start_probe_unsafe_19_~a#1.offset_BEFORE_CALL_70| (_ BitVec 32)) (|v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_60| (_ BitVec 32)) (|v_ldv_malloc_#res.base_275| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_275|)))) (exists ((|v_ULTIMATE.start_f19_#t~ret38#1.base_139| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_f19_#t~ret38#1.base_139| (_ bv1 1)) |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_60|)))) (_ bv1 1))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_f19_#t~ret38#1.base_139|))))) (or (not (= |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_60| |v_ULTIMATE.start_probe_unsafe_19_~a#1.base_BEFORE_CALL_69|)) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_f19_#t~ret38#1.base_139| (_ bv0 1)) |v_ULTIMATE.start_probe_unsafe_19_~a#1.base_BEFORE_CALL_69|))))))) (not (= |v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_52| |v_ULTIMATE.start_probe_unsafe_19_~a#1.offset_BEFORE_CALL_70|))))) (and (= |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_60| |v_ULTIMATE.start_probe_unsafe_19_~a#1.base_BEFORE_CALL_69|) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_275| (_ bv0 1)) |v_ULTIMATE.start_probe_unsafe_19_~a#1.base_BEFORE_CALL_69|)))) (_ bv1 1))) (= |v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_52| |v_ULTIMATE.start_probe_unsafe_19_~a#1.offset_BEFORE_CALL_70|)) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_275| (_ bv1 1)) |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_60|))) (_ bv1 1))))))) is different from false [2021-11-23 03:32:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:40,102 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-11-23 03:32:40,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:32:40,103 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 33 [2021-11-23 03:32:40,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:40,104 INFO L225 Difference]: With dead ends: 89 [2021-11-23 03:32:40,104 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 03:32:40,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=8, NotChecked=74, Total=462 [2021-11-23 03:32:40,105 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 27 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:40,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 394 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 154 Unchecked, 0.3s Time] [2021-11-23 03:32:40,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 03:32:40,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-23 03:32:40,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.173913043478261) internal successors, (81), 78 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 03:32:40,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-11-23 03:32:40,110 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 33 [2021-11-23 03:32:40,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:40,110 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-11-23 03:32:40,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 03:32:40,110 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-11-23 03:32:40,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 03:32:40,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:40,111 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:40,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:40,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:32:40,312 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:32:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:40,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1801348876, now seen corresponding path program 1 times [2021-11-23 03:32:40,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:32:40,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42988936] [2021-11-23 03:32:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:40,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:32:40,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:32:40,315 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:32:40,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-23 03:32:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:40,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:32:40,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:42,622 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:32:42,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 33 treesize of output 35 [2021-11-23 03:32:42,637 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:32:42,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 03:32:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:42,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:32:54,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2021-11-23 03:32:54,842 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:32:54,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 52 [2021-11-23 03:32:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:55,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:32:55,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42988936] [2021-11-23 03:32:55,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42988936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:55,023 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:55,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 12 [2021-11-23 03:32:55,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123417716] [2021-11-23 03:32:55,023 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:55,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:32:55,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:32:55,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:32:55,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=115, Unknown=4, NotChecked=0, Total=156 [2021-11-23 03:32:55,025 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 03:32:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:55,110 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2021-11-23 03:32:55,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:32:55,111 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 33 [2021-11-23 03:32:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:55,111 INFO L225 Difference]: With dead ends: 88 [2021-11-23 03:32:55,111 INFO L226 Difference]: Without dead ends: 88 [2021-11-23 03:32:55,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=37, Invalid=115, Unknown=4, NotChecked=0, Total=156 [2021-11-23 03:32:55,112 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 90 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:55,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 243 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2021-11-23 03:32:55,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-23 03:32:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-23 03:32:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 77 states have internal predecessors, (80), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-23 03:32:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2021-11-23 03:32:55,117 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 33 [2021-11-23 03:32:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:55,118 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2021-11-23 03:32:55,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 03:32:55,118 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2021-11-23 03:32:55,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 03:32:55,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:55,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:55,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-23 03:32:55,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:32:55,328 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 20 more)] === [2021-11-23 03:32:55,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:55,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1275833015, now seen corresponding path program 1 times [2021-11-23 03:32:55,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:32:55,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769610598] [2021-11-23 03:32:55,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:55,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:32:55,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:32:55,336 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:32:55,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-23 03:32:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:55,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:32:55,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:55,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-23 03:32:55,783 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 03:32:55,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-23 03:32:55,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:32:55,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 39 [2021-11-23 03:32:56,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-23 03:32:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:32:58,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:33:00,799 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_5| (Array (_ BitVec 32) (_ BitVec 1))) (|v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_62| (_ BitVec 32)) (|ULTIMATE.start_f19_#t~ret38#1.base| (_ BitVec 32)) (|v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_54| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_61| (_ BitVec 32)) (|v_ULTIMATE.start_probe_unsafe_19_~a#1.offset_BEFORE_CALL_79| (_ BitVec 32)) (|v_ULTIMATE.start_probe_unsafe_19_~a#1.base_BEFORE_CALL_75| (_ BitVec 32))) (or (= (store (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_62| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_62|) |v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_54| |ULTIMATE.start_f19_#t~ret38#1.base|)) |v_ULTIMATE.start_probe_unsafe_19_~a#1.base_BEFORE_CALL_75|) (bvadd (_ bv4 32) |v_ULTIMATE.start_probe_unsafe_19_~a#1.offset_BEFORE_CALL_79|)) (_ bv0 1)) |v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_61| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_5|) (exists ((|ULTIMATE.start_f19_#t~ret38#1.base| (_ BitVec 32))) (not (= (store (store |c_old(#valid)| (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_62| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_62|) |v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_54| |ULTIMATE.start_f19_#t~ret38#1.base|)) |v_ULTIMATE.start_probe_unsafe_19_~a#1.base_BEFORE_CALL_75|) (bvadd (_ bv4 32) |v_ULTIMATE.start_probe_unsafe_19_~a#1.offset_BEFORE_CALL_79|)) (_ bv0 1)) |v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_61| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_5|))))) is different from false [2021-11-23 03:33:00,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:33:00,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769610598] [2021-11-23 03:33:00,849 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-11-23 03:33:00,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [741672866] [2021-11-23 03:33:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:00,849 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:33:00,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:33:00,851 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:33:00,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-23 03:33:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:01,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 03:33:01,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:01,010 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@64ea2a5d [2021-11-23 03:33:01,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691532274] [2021-11-23 03:33:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:01,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:01,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:33:01,013 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:33:01,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-23 03:33:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:01,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 03:33:01,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:01,103 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@64ea2a5d [2021-11-23 03:33:01,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:01,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-23 03:33:01,104 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-23 03:33:01,104 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-23 03:33:01,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (23 of 24 remaining) [2021-11-23 03:33:01,113 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (22 of 24 remaining) [2021-11-23 03:33:01,113 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (21 of 24 remaining) [2021-11-23 03:33:01,114 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (20 of 24 remaining) [2021-11-23 03:33:01,114 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (19 of 24 remaining) [2021-11-23 03:33:01,114 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (18 of 24 remaining) [2021-11-23 03:33:01,114 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (17 of 24 remaining) [2021-11-23 03:33:01,115 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (16 of 24 remaining) [2021-11-23 03:33:01,115 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (15 of 24 remaining) [2021-11-23 03:33:01,115 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (14 of 24 remaining) [2021-11-23 03:33:01,115 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (13 of 24 remaining) [2021-11-23 03:33:01,115 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (12 of 24 remaining) [2021-11-23 03:33:01,116 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (11 of 24 remaining) [2021-11-23 03:33:01,116 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (10 of 24 remaining) [2021-11-23 03:33:01,116 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (9 of 24 remaining) [2021-11-23 03:33:01,116 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (8 of 24 remaining) [2021-11-23 03:33:01,116 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE (7 of 24 remaining) [2021-11-23 03:33:01,117 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (6 of 24 remaining) [2021-11-23 03:33:01,117 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (5 of 24 remaining) [2021-11-23 03:33:01,117 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location f19_undoErr0REQUIRES_VIOLATION (4 of 24 remaining) [2021-11-23 03:33:01,117 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location f19_undoErr1REQUIRES_VIOLATION (3 of 24 remaining) [2021-11-23 03:33:01,117 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (2 of 24 remaining) [2021-11-23 03:33:01,118 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE (1 of 24 remaining) [2021-11-23 03:33:01,118 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location f19_undoErr4ASSERT_VIOLATIONMEMORY_FREE (0 of 24 remaining) [2021-11-23 03:33:01,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:01,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:01,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:01,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:33:01,736 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:01,740 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:33:01,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:33:01 BoogieIcfgContainer [2021-11-23 03:33:01,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:33:01,756 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:33:01,757 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:33:01,757 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:33:01,757 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:25:50" (3/4) ... [2021-11-23 03:33:01,761 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 03:33:01,761 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:33:01,762 INFO L158 Benchmark]: Toolchain (without parser) took 432829.12ms. Allocated memory was 67.1MB in the beginning and 88.1MB in the end (delta: 21.0MB). Free memory was 46.2MB in the beginning and 35.2MB in the end (delta: 11.0MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. [2021-11-23 03:33:01,762 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 67.1MB. Free memory is still 47.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:33:01,763 INFO L158 Benchmark]: CACSL2BoogieTranslator took 764.93ms. Allocated memory is still 67.1MB. Free memory was 45.9MB in the beginning and 36.8MB in the end (delta: 9.1MB). Peak memory consumption was 20.1MB. Max. memory is 16.1GB. [2021-11-23 03:33:01,763 INFO L158 Benchmark]: Boogie Procedure Inliner took 86.42ms. Allocated memory is still 67.1MB. Free memory was 36.6MB in the beginning and 34.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:33:01,764 INFO L158 Benchmark]: Boogie Preprocessor took 48.57ms. Allocated memory is still 67.1MB. Free memory was 34.3MB in the beginning and 32.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:33:01,764 INFO L158 Benchmark]: RCFGBuilder took 628.93ms. Allocated memory is still 67.1MB. Free memory was 32.8MB in the beginning and 36.5MB in the end (delta: -3.8MB). Peak memory consumption was 5.9MB. Max. memory is 16.1GB. [2021-11-23 03:33:01,765 INFO L158 Benchmark]: TraceAbstraction took 431288.98ms. Allocated memory was 67.1MB in the beginning and 88.1MB in the end (delta: 21.0MB). Free memory was 35.9MB in the beginning and 36.0MB in the end (delta: -18.5kB). Peak memory consumption was 21.9MB. Max. memory is 16.1GB. [2021-11-23 03:33:01,765 INFO L158 Benchmark]: Witness Printer took 4.85ms. Allocated memory is still 88.1MB. Free memory was 36.0MB in the beginning and 35.2MB in the end (delta: 811.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:33:01,767 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 67.1MB. Free memory is still 47.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 764.93ms. Allocated memory is still 67.1MB. Free memory was 45.9MB in the beginning and 36.8MB in the end (delta: 9.1MB). Peak memory consumption was 20.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 86.42ms. Allocated memory is still 67.1MB. Free memory was 36.6MB in the beginning and 34.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.57ms. Allocated memory is still 67.1MB. Free memory was 34.3MB in the beginning and 32.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 628.93ms. Allocated memory is still 67.1MB. Free memory was 32.8MB in the beginning and 36.5MB in the end (delta: -3.8MB). Peak memory consumption was 5.9MB. Max. memory is 16.1GB. * TraceAbstraction took 431288.98ms. Allocated memory was 67.1MB in the beginning and 88.1MB in the end (delta: 21.0MB). Free memory was 35.9MB in the beginning and 36.0MB in the end (delta: -18.5kB). Peak memory consumption was 21.9MB. Max. memory is 16.1GB. * Witness Printer took 4.85ms. Allocated memory is still 88.1MB. Free memory was 36.0MB in the beginning and 35.2MB in the end (delta: 811.7kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 803]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: unable to decide satisfiability of path constraint, overapproximation of memtrack at line 803. Possible FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; [L804] CALL entry_point() [L797] struct A19 a19; [L798] CALL, EXPR probe_unsafe_19(&a19) [L774] int ret = - -3; [L775] CALL, EXPR ldv_malloc(sizeof(int)) [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L775] RET, EXPR ldv_malloc(sizeof(int)) [L775] a->q = (int *)ldv_malloc(sizeof(int)) [L776] EXPR a->q [L776] COND FALSE !(!a->q) [L777] CALL, EXPR f19(a) [L762] CALL, EXPR ldv_malloc(sizeof(int)) [L526] COND FALSE !(__VERIFIER_nondet_int()) [L529] return 0; [L762] RET, EXPR ldv_malloc(sizeof(int)) [L762] a->p = (int *)ldv_malloc(sizeof(int)) [L763] a->p [L763] COND FALSE !(a->p) [L765] return - -3; [L777] RET, EXPR f19(a) [L777] ret = f19(a) [L778] COND TRUE \read(ret) [L788] EXPR a->q [L788] free(a->q) [L788] free(a->q) [L788] free(a->q) [L790] return ret; [L798] RET, EXPR probe_unsafe_19(&a19) [L798] int ret = probe_unsafe_19(&a19); [L799] COND FALSE !(ret==0) [L804] RET entry_point() - UnprovableResult [Line: 775]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 775]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 776]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 776]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 762]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 762]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 763]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 763]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 793]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 793]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 793]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 793]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 793]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 768]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 768]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 768]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 768]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 768]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 70 locations, 24 error locations. Started 1 CEGAR loops. OverallTime: 431.2s, OverallIterations: 31, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 36.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2801 SdHoareTripleChecker+Valid, 8.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2766 mSDsluCounter, 9779 SdHoareTripleChecker+Invalid, 7.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1745 IncrementalHoareTripleChecker+Unchecked, 7921 mSDsCounter, 278 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3281 IncrementalHoareTripleChecker+Invalid, 5304 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 278 mSolverCounterUnsat, 1858 mSDtfsCounter, 3281 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2206 GetRequests, 1713 SyntacticMatches, 101 SemanticMatches, 392 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 357.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=11, InterpolantAutomatonStates: 285, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 30 MinimizatonAttempts, 519 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 380.4s InterpolantComputationTime, 1133 NumberOfCodeBlocks, 1133 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 2147 ConstructedInterpolants, 303 QuantifiedInterpolants, 23316 SizeOfPredicates, 501 NumberOfNonLiveVariables, 4450 ConjunctsInSsa, 626 ConjunctsInUnsatCore, 87 InterpolantComputations, 47 PerfectInterpolantSequences, 222/308 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-23 03:33:01,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf1aa07-0498-4632-811f-e01ec14e3347/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN