./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P --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 7ecc590057ed2a75208183cfd6234616268fa2b1af2dc90ae740756ef7d3d489 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:47:05,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:47:05,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:47:06,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:47:06,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:47:06,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:47:06,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:47:06,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:47:06,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:47:06,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:47:06,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:47:06,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:47:06,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:47:06,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:47:06,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:47:06,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:47:06,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:47:06,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:47:06,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:47:06,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:47:06,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:47:06,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:47:06,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:47:06,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:47:06,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:47:06,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:47:06,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:47:06,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:47:06,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:47:06,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:47:06,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:47:06,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:47:06,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:47:06,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:47:06,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:47:06,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:47:06,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:47:06,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:47:06,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:47:06,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:47:06,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:47:06,121 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 00:47:06,147 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:47:06,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:47:06,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:47:06,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:47:06,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:47:06,149 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:47:06,149 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:47:06,149 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:47:06,150 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:47:06,150 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:47:06,150 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:47:06,150 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:47:06,151 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:47:06,151 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:47:06,151 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:47:06,151 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:47:06,152 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:47:06,152 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:47:06,153 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 00:47:06,153 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 00:47:06,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:47:06,154 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:47:06,154 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:47:06,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:47:06,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:47:06,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:47:06,155 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 00:47:06,155 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 00:47:06,155 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 00:47:06,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:47:06,156 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 00:47:06,156 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:47:06,156 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:47:06,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:47:06,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:47:06,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:47:06,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:47:06,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:47:06,158 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:47:06,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:47:06,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:47:06,159 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:47:06,159 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_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ecc590057ed2a75208183cfd6234616268fa2b1af2dc90ae740756ef7d3d489 [2021-11-21 00:47:06,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:47:06,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:47:06,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:47:06,454 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:47:06,455 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:47:06,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i [2021-11-21 00:47:06,539 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/data/a6ff6cdc1/84611b4572d24739a5c027c244bba907/FLAGcb7d67881 [2021-11-21 00:47:07,232 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:47:07,236 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i [2021-11-21 00:47:07,261 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/data/a6ff6cdc1/84611b4572d24739a5c027c244bba907/FLAGcb7d67881 [2021-11-21 00:47:07,481 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/data/a6ff6cdc1/84611b4572d24739a5c027c244bba907 [2021-11-21 00:47:07,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:47:07,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:47:07,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:47:07,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:47:07,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:47:07,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:47:07" (1/1) ... [2021-11-21 00:47:07,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@110112fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:07, skipping insertion in model container [2021-11-21 00:47:07,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:47:07" (1/1) ... [2021-11-21 00:47:07,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:47:07,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:47:08,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:47:08,107 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) [2021-11-21 00:47:08,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@14847bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:08, skipping insertion in model container [2021-11-21 00:47:08,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:47:08,109 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-21 00:47:08,112 INFO L158 Benchmark]: Toolchain (without parser) took 624.96ms. Allocated memory is still 127.9MB. Free memory was 85.0MB in the beginning and 99.2MB in the end (delta: -14.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:47:08,114 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 127.9MB. Free memory is still 102.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:47:08,116 INFO L158 Benchmark]: CACSL2BoogieTranslator took 618.24ms. Allocated memory is still 127.9MB. Free memory was 84.8MB in the beginning and 99.2MB in the end (delta: -14.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:47:08,119 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 127.9MB. Free memory is still 102.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 618.24ms. Allocated memory is still 127.9MB. Free memory was 84.8MB in the beginning and 99.2MB in the end (delta: -14.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 529]: 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_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P --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 7ecc590057ed2a75208183cfd6234616268fa2b1af2dc90ae740756ef7d3d489 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:47:10,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:47:10,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:47:10,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:47:10,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:47:10,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:47:10,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:47:10,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:47:10,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:47:10,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:47:10,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:47:10,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:47:10,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:47:10,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:47:10,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:47:10,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:47:10,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:47:10,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:47:10,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:47:10,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:47:10,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:47:10,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:47:10,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:47:10,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:47:10,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:47:10,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:47:10,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:47:10,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:47:10,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:47:10,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:47:10,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:47:10,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:47:10,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:47:10,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:47:10,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:47:10,658 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:47:10,658 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:47:10,659 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:47:10,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:47:10,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:47:10,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:47:10,664 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-21 00:47:10,704 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:47:10,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:47:10,707 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:47:10,707 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:47:10,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:47:10,708 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:47:10,709 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:47:10,709 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:47:10,709 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:47:10,709 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:47:10,711 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:47:10,711 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:47:10,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 00:47:10,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 00:47:10,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:47:10,714 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:47:10,714 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:47:10,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:47:10,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:47:10,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:47:10,715 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 00:47:10,716 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 00:47:10,716 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 00:47:10,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:47:10,717 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 00:47:10,717 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 00:47:10,717 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 00:47:10,717 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:47:10,718 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:47:10,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:47:10,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 00:47:10,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:47:10,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:47:10,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:47:10,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:47:10,720 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 00:47:10,721 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 00:47:10,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:47:10,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:47:10,721 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_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ecc590057ed2a75208183cfd6234616268fa2b1af2dc90ae740756ef7d3d489 [2021-11-21 00:47:11,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:47:11,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:47:11,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:47:11,210 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:47:11,210 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:47:11,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i [2021-11-21 00:47:11,302 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/data/1ffe40dc6/57da5bb6c9b04f91af62b2b2d386d6e8/FLAGe5cbe7c64 [2021-11-21 00:47:11,869 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:47:11,870 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i [2021-11-21 00:47:11,885 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/data/1ffe40dc6/57da5bb6c9b04f91af62b2b2d386d6e8/FLAGe5cbe7c64 [2021-11-21 00:47:12,207 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/data/1ffe40dc6/57da5bb6c9b04f91af62b2b2d386d6e8 [2021-11-21 00:47:12,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:47:12,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:47:12,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:47:12,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:47:12,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:47:12,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:47:12" (1/1) ... [2021-11-21 00:47:12,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b1a36a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:12, skipping insertion in model container [2021-11-21 00:47:12,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:47:12" (1/1) ... [2021-11-21 00:47:12,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:47:12,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:47:12,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:47:12,658 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-21 00:47:12,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:47:12,729 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:47:12,741 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:47:12,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:47:12,846 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:47:12,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:12 WrapperNode [2021-11-21 00:47:12,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:47:12,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:47:12,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:47:12,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:47:12,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:12" (1/1) ... [2021-11-21 00:47:12,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:12" (1/1) ... [2021-11-21 00:47:12,901 INFO L137 Inliner]: procedures = 119, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2021-11-21 00:47:12,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:47:12,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:47:12,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:47:12,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:47:12,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:12" (1/1) ... [2021-11-21 00:47:12,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:12" (1/1) ... [2021-11-21 00:47:12,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:12" (1/1) ... [2021-11-21 00:47:12,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:12" (1/1) ... [2021-11-21 00:47:12,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:12" (1/1) ... [2021-11-21 00:47:12,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:12" (1/1) ... [2021-11-21 00:47:12,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:12" (1/1) ... [2021-11-21 00:47:12,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:47:12,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:47:12,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:47:12,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:47:12,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:12" (1/1) ... [2021-11-21 00:47:12,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:47:12,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:12,976 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:47:12,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:47:13,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-21 00:47:13,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:47:13,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:47:13,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 00:47:13,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:47:13,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:47:13,119 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:47:13,121 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:47:13,320 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:47:13,328 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:47:13,328 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:47:13,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:47:13 BoogieIcfgContainer [2021-11-21 00:47:13,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:47:13,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:47:13,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:47:13,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:47:13,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:47:12" (1/3) ... [2021-11-21 00:47:13,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7ed5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:47:13, skipping insertion in model container [2021-11-21 00:47:13,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:12" (2/3) ... [2021-11-21 00:47:13,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7ed5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:47:13, skipping insertion in model container [2021-11-21 00:47:13,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:47:13" (3/3) ... [2021-11-21 00:47:13,342 INFO L111 eAbstractionObserver]: Analyzing ICFG stroeder1-alloca-1.i [2021-11-21 00:47:13,348 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:47:13,349 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-21 00:47:13,475 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:47:13,490 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 [2021-11-21 00:47:13,491 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-21 00:47:13,512 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:47:13,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:13,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:47:13,522 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:47:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:13,533 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-21 00:47:13,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:13,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603843386] [2021-11-21 00:47:13,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:13,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:13,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:13,553 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:13,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 00:47:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:13,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:47:13,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:13,787 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 [2021-11-21 00:47:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:13,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:13,876 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:13,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603843386] [2021-11-21 00:47:13,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603843386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:13,878 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:47:13,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 00:47:13,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533993898] [2021-11-21 00:47:13,882 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:13,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:47:13,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:13,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:47:13,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:47:13,928 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:14,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:14,000 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-11-21 00:47:14,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:47:14,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 00:47:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:14,015 INFO L225 Difference]: With dead ends: 22 [2021-11-21 00:47:14,015 INFO L226 Difference]: Without dead ends: 20 [2021-11-21 00:47:14,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:47:14,023 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:14,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:47:14,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-21 00:47:14,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-21 00:47:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:14,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-21 00:47:14,057 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 6 [2021-11-21 00:47:14,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:14,058 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-21 00:47:14,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:14,058 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-21 00:47:14,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:47:14,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:14,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:47:14,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:14,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:47:14,271 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:47:14,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:14,275 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-21 00:47:14,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:14,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685425754] [2021-11-21 00:47:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:14,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:14,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:14,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:14,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 00:47:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:14,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:47:14,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:14,418 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 [2021-11-21 00:47:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:14,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:14,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:14,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685425754] [2021-11-21 00:47:14,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685425754] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:14,688 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:47:14,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 00:47:14,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708894570] [2021-11-21 00:47:14,689 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:14,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:47:14,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:14,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:47:14,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:47:14,692 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:15,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:15,058 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2021-11-21 00:47:15,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:47:15,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 00:47:15,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:15,061 INFO L225 Difference]: With dead ends: 54 [2021-11-21 00:47:15,062 INFO L226 Difference]: Without dead ends: 54 [2021-11-21 00:47:15,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:47:15,064 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 86 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:15,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 67 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:47:15,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-21 00:47:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 24. [2021-11-21 00:47:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-21 00:47:15,073 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 6 [2021-11-21 00:47:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:15,073 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-21 00:47:15,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:15,074 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-21 00:47:15,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:47:15,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:15,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:15,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:15,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:47:15,287 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:47:15,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:15,288 INFO L85 PathProgramCache]: Analyzing trace with hash 176742579, now seen corresponding path program 1 times [2021-11-21 00:47:15,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:15,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241086232] [2021-11-21 00:47:15,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:15,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:15,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:15,291 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:15,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 00:47:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:15,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:47:15,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:15,390 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 [2021-11-21 00:47:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:15,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:15,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:15,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241086232] [2021-11-21 00:47:15,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241086232] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:15,502 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:47:15,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 00:47:15,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543138535] [2021-11-21 00:47:15,503 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:15,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:47:15,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:15,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:47:15,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:47:15,504 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:15,623 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-11-21 00:47:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:47:15,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:47:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:15,625 INFO L225 Difference]: With dead ends: 26 [2021-11-21 00:47:15,625 INFO L226 Difference]: Without dead ends: 26 [2021-11-21 00:47:15,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:47:15,627 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:15,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 32 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:47:15,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-21 00:47:15,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-11-21 00:47:15,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-21 00:47:15,639 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2021-11-21 00:47:15,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:15,639 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-21 00:47:15,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-21 00:47:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:47:15,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:15,643 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:15,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:15,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:47:15,854 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:47:15,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:15,854 INFO L85 PathProgramCache]: Analyzing trace with hash 176742580, now seen corresponding path program 1 times [2021-11-21 00:47:15,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:15,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861460973] [2021-11-21 00:47:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:15,855 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:15,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:15,856 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:15,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 00:47:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:15,916 WARN L261 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 00:47:15,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:15,958 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 8 treesize of output 7 [2021-11-21 00:47:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:16,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:16,508 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:16,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861460973] [2021-11-21 00:47:16,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861460973] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:16,509 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:47:16,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 9 [2021-11-21 00:47:16,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242116332] [2021-11-21 00:47:16,509 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:16,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:47:16,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:16,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:47:16,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:47:16,511 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:17,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:17,335 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-11-21 00:47:17,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:47:17,336 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:47:17,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:17,337 INFO L225 Difference]: With dead ends: 33 [2021-11-21 00:47:17,337 INFO L226 Difference]: Without dead ends: 33 [2021-11-21 00:47:17,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:47:17,339 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 114 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:17,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 43 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:47:17,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-21 00:47:17,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-11-21 00:47:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-21 00:47:17,344 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2021-11-21 00:47:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:17,344 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-21 00:47:17,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:17,345 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-21 00:47:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 00:47:17,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:17,345 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:17,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:17,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:47:17,553 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:47:17,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:17,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-21 00:47:17,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:17,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710421075] [2021-11-21 00:47:17,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:17,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:17,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:17,556 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:17,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 00:47:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:17,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:47:17,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:17,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:17,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:17,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710421075] [2021-11-21 00:47:17,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710421075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:17,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1060905660] [2021-11-21 00:47:17,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:17,776 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:47:17,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:47:17,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:47:17,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-21 00:47:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:17,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:47:17,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:17,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:17,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1060905660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:17,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25492684] [2021-11-21 00:47:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:17,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:17,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:17,982 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:47:17,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:47:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:18,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:47:18,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:18,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:18,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25492684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:18,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:47:18,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-21 00:47:18,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126232474] [2021-11-21 00:47:18,135 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:47:18,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:47:18,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:18,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:47:18,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:47:18,137 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:18,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:18,207 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-11-21 00:47:18,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:47:18,209 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 00:47:18,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:18,210 INFO L225 Difference]: With dead ends: 41 [2021-11-21 00:47:18,210 INFO L226 Difference]: Without dead ends: 41 [2021-11-21 00:47:18,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:47:18,211 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:18,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 67 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:47:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-21 00:47:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2021-11-21 00:47:18,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-11-21 00:47:18,216 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 10 [2021-11-21 00:47:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:18,216 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-11-21 00:47:18,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:18,217 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-11-21 00:47:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 00:47:18,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:18,217 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:18,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-21 00:47:18,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:18,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 00:47:18,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:18,819 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:47:18,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:18,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-21 00:47:18,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:18,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499375078] [2021-11-21 00:47:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:18,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:18,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:18,822 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:18,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 00:47:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:18,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:47:18,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:18,895 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 8 treesize of output 7 [2021-11-21 00:47:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:19,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:19,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:19,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499375078] [2021-11-21 00:47:19,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499375078] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:19,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [270409255] [2021-11-21 00:47:19,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:19,783 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:47:19,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:47:19,789 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:47:19,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-21 00:47:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:19,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:47:19,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:19,955 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 8 treesize of output 7 [2021-11-21 00:47:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:20,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:20,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [270409255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:20,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782847576] [2021-11-21 00:47:20,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:20,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:20,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:20,420 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:47:20,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:47:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:20,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:47:20,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:20,508 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 8 treesize of output 7 [2021-11-21 00:47:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:20,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:20,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782847576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:20,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:47:20,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2021-11-21 00:47:20,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321867949] [2021-11-21 00:47:20,874 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:47:20,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 00:47:20,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:20,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 00:47:20,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:47:20,876 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:21,223 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-11-21 00:47:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:47:21,224 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 00:47:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:21,225 INFO L225 Difference]: With dead ends: 51 [2021-11-21 00:47:21,225 INFO L226 Difference]: Without dead ends: 51 [2021-11-21 00:47:21,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:47:21,226 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:21,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 89 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 73 Invalid, 0 Unknown, 14 Unchecked, 0.3s Time] [2021-11-21 00:47:21,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-21 00:47:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2021-11-21 00:47:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-21 00:47:21,232 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 10 [2021-11-21 00:47:21,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:21,233 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-21 00:47:21,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-21 00:47:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 00:47:21,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:21,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:21,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:21,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:21,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:21,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:21,846 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:47:21,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:21,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1604245468, now seen corresponding path program 1 times [2021-11-21 00:47:21,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:21,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271196131] [2021-11-21 00:47:21,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:21,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:21,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:21,848 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:21,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-21 00:47:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:21,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:47:21,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:21,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:22,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:22,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271196131] [2021-11-21 00:47:22,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271196131] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:22,024 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:47:22,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:47:22,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302311928] [2021-11-21 00:47:22,024 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:22,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:47:22,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:22,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:47:22,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:47:22,027 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:22,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:22,124 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-11-21 00:47:22,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:47:22,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-21 00:47:22,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:22,126 INFO L225 Difference]: With dead ends: 51 [2021-11-21 00:47:22,126 INFO L226 Difference]: Without dead ends: 51 [2021-11-21 00:47:22,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:47:22,127 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:22,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 55 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:47:22,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-21 00:47:22,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2021-11-21 00:47:22,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:22,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-11-21 00:47:22,132 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 14 [2021-11-21 00:47:22,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:22,132 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-11-21 00:47:22,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:22,133 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-11-21 00:47:22,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 00:47:22,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:22,140 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:22,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:22,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:47:22,352 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:47:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:22,352 INFO L85 PathProgramCache]: Analyzing trace with hash 262066236, now seen corresponding path program 1 times [2021-11-21 00:47:22,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:22,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573878598] [2021-11-21 00:47:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:22,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:22,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:22,353 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:22,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 00:47:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:22,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:47:22,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:22,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:22,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:22,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573878598] [2021-11-21 00:47:22,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573878598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:22,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1394345618] [2021-11-21 00:47:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:22,571 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:47:22,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:47:22,576 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:47:22,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-21 00:47:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:22,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:47:22,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:22,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:22,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1394345618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:22,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666822309] [2021-11-21 00:47:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:22,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:22,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:22,797 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:47:22,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 00:47:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:22,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:47:22,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:22,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:22,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666822309] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:22,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:47:22,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-21 00:47:22,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524212236] [2021-11-21 00:47:22,974 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:47:22,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:47:22,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:22,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:47:22,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:47:22,976 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:23,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:23,045 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-11-21 00:47:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:47:23,046 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-21 00:47:23,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:23,047 INFO L225 Difference]: With dead ends: 47 [2021-11-21 00:47:23,047 INFO L226 Difference]: Without dead ends: 47 [2021-11-21 00:47:23,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:47:23,048 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:23,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 67 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:47:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-21 00:47:23,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-11-21 00:47:23,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.175) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:23,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-11-21 00:47:23,054 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 16 [2021-11-21 00:47:23,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:23,054 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-11-21 00:47:23,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:23,055 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-11-21 00:47:23,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 00:47:23,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:23,055 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:23,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:23,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:23,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:23,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:23,667 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:47:23,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:23,668 INFO L85 PathProgramCache]: Analyzing trace with hash -749051014, now seen corresponding path program 1 times [2021-11-21 00:47:23,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:23,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280422665] [2021-11-21 00:47:23,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:23,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:23,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:23,669 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:23,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 00:47:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:23,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:47:23,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:23,750 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 8 treesize of output 7 [2021-11-21 00:47:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:24,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:24,833 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:24,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280422665] [2021-11-21 00:47:24,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280422665] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:24,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1999159924] [2021-11-21 00:47:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:24,834 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:47:24,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:47:24,837 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:47:24,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-21 00:47:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:24,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:47:24,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:25,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:25,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1999159924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:25,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516674038] [2021-11-21 00:47:25,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:25,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:25,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:25,549 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:47:25,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 00:47:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:25,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:47:25,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:25,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:25,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516674038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:25,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:47:25,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 7, 8, 7] total 23 [2021-11-21 00:47:25,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990174292] [2021-11-21 00:47:25,804 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:47:25,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 00:47:25,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:25,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 00:47:25,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-11-21 00:47:25,806 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:27,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:27,640 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2021-11-21 00:47:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 00:47:27,641 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-21 00:47:27,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:27,642 INFO L225 Difference]: With dead ends: 65 [2021-11-21 00:47:27,642 INFO L226 Difference]: Without dead ends: 65 [2021-11-21 00:47:27,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=302, Invalid=1180, Unknown=0, NotChecked=0, Total=1482 [2021-11-21 00:47:27,644 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 112 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:27,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 139 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 193 Invalid, 0 Unknown, 24 Unchecked, 0.5s Time] [2021-11-21 00:47:27,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-21 00:47:27,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-11-21 00:47:27,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-11-21 00:47:27,651 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 16 [2021-11-21 00:47:27,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:27,652 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-11-21 00:47:27,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:27,652 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-11-21 00:47:27,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 00:47:27,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:27,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:27,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:27,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:28,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-21 00:47:28,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 00:47:28,261 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:47:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:28,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1557469017, now seen corresponding path program 1 times [2021-11-21 00:47:28,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:28,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56356613] [2021-11-21 00:47:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:28,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:28,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:28,263 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:28,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-21 00:47:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:28,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:47:28,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:47:28,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:47:32,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:32,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56356613] [2021-11-21 00:47:32,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56356613] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:32,621 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:47:32,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:47:32,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76303338] [2021-11-21 00:47:32,622 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:32,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:47:32,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:32,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:47:32,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=25, Unknown=2, NotChecked=0, Total=42 [2021-11-21 00:47:32,623 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:32,656 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-11-21 00:47:32,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:47:32,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 00:47:32,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:32,657 INFO L225 Difference]: With dead ends: 50 [2021-11-21 00:47:32,657 INFO L226 Difference]: Without dead ends: 35 [2021-11-21 00:47:32,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=15, Invalid=25, Unknown=2, NotChecked=0, Total=42 [2021-11-21 00:47:32,658 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:32,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 46 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2021-11-21 00:47:32,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-21 00:47:32,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-21 00:47:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:32,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-11-21 00:47:32,669 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 18 [2021-11-21 00:47:32,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:32,670 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-11-21 00:47:32,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:32,670 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-11-21 00:47:32,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 00:47:32,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:32,671 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-21 00:47:32,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:32,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:47:32,871 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:47:32,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:32,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-11-21 00:47:32,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:32,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617908492] [2021-11-21 00:47:32,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:47:32,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:32,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:32,873 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:32,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-21 00:47:32,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:47:32,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:47:32,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:47:32,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:32,975 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 8 treesize of output 7 [2021-11-21 00:47:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:33,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:34,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:34,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617908492] [2021-11-21 00:47:34,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617908492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:34,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1506732098] [2021-11-21 00:47:34,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:47:34,791 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:47:34,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:47:34,799 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:47:34,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-21 00:47:34,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:47:34,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:47:34,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 00:47:34,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:34,994 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 8 treesize of output 7 [2021-11-21 00:47:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:35,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:35,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1506732098] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:35,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731259574] [2021-11-21 00:47:35,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:47:35,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:35,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:35,873 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:47:35,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-21 00:47:35,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:47:35,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:47:35,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:47:35,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:35,967 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 8 treesize of output 7 [2021-11-21 00:47:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:36,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:37,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731259574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:37,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:47:37,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 24 [2021-11-21 00:47:37,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099327271] [2021-11-21 00:47:37,627 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:47:37,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 00:47:37,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:37,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 00:47:37,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:47:37,628 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:40,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:40,073 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2021-11-21 00:47:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:47:40,074 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 00:47:40,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:40,075 INFO L225 Difference]: With dead ends: 115 [2021-11-21 00:47:40,075 INFO L226 Difference]: Without dead ends: 115 [2021-11-21 00:47:40,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2021-11-21 00:47:40,076 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 157 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:40,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 125 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 228 Invalid, 0 Unknown, 12 Unchecked, 1.0s Time] [2021-11-21 00:47:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-21 00:47:40,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 51. [2021-11-21 00:47:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.163265306122449) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:40,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-11-21 00:47:40,083 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 18 [2021-11-21 00:47:40,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:40,084 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-11-21 00:47:40,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:40,084 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-11-21 00:47:40,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 00:47:40,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:40,085 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:40,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:40,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:40,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-21 00:47:40,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:40,688 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:47:40,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:40,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1885902333, now seen corresponding path program 2 times [2021-11-21 00:47:40,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:40,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733820532] [2021-11-21 00:47:40,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:47:40,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:40,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:40,690 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:40,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-21 00:47:40,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:47:40,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:47:40,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 00:47:40,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:40,784 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 8 treesize of output 7 [2021-11-21 00:47:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:41,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:45,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:45,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733820532] [2021-11-21 00:47:45,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733820532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:45,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1577663056] [2021-11-21 00:47:45,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:47:45,242 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:47:45,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:47:45,250 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:47:45,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-21 00:47:45,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:47:45,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:47:45,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:47:45,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:46,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:47,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1577663056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:47,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266884380] [2021-11-21 00:47:47,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:47:47,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:47,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:47,400 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:47:47,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-21 00:47:47,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:47:47,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:47:47,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:47:47,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:47,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:47:47,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266884380] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:47,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:47:47,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11, 10, 11, 10] total 41 [2021-11-21 00:47:47,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63335763] [2021-11-21 00:47:47,815 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:47:47,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-21 00:47:47,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:47,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-21 00:47:47,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:47:47,818 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 41 states, 41 states have (on average 2.341463414634146) internal successors, (96), 41 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:53,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:53,725 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2021-11-21 00:47:53,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-21 00:47:53,727 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.341463414634146) internal successors, (96), 41 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-21 00:47:53,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:53,728 INFO L225 Difference]: With dead ends: 77 [2021-11-21 00:47:53,728 INFO L226 Difference]: Without dead ends: 67 [2021-11-21 00:47:53,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=399, Invalid=2907, Unknown=0, NotChecked=0, Total=3306 [2021-11-21 00:47:53,730 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 83 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:53,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 135 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 246 Invalid, 0 Unknown, 6 Unchecked, 1.2s Time] [2021-11-21 00:47:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-21 00:47:53,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2021-11-21 00:47:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 55 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-11-21 00:47:53,736 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 28 [2021-11-21 00:47:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:53,736 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-11-21 00:47:53,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.341463414634146) internal successors, (96), 41 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:47:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-11-21 00:47:53,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 00:47:53,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:53,738 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:53,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:53,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-21 00:47:54,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-21 00:47:54,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:54,350 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:47:54,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:54,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1844565766, now seen corresponding path program 3 times [2021-11-21 00:47:54,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:54,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50914911] [2021-11-21 00:47:54,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:47:54,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:54,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:54,352 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:54,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-21 00:47:54,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:47:54,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:47:54,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 00:47:54,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:54,503 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 8 treesize of output 7 [2021-11-21 00:47:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:47:55,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:47:57,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:57,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50914911] [2021-11-21 00:47:57,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50914911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:57,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1821969162] [2021-11-21 00:47:57,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:47:57,600 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:47:57,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:47:57,600 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:47:57,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-21 00:47:57,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:47:57,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:47:57,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 00:47:57,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:57,783 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 8 treesize of output 7 [2021-11-21 00:47:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:47:58,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:47:59,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1821969162] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:59,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849610562] [2021-11-21 00:47:59,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:47:59,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:59,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:59,328 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:47:59,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-21 00:47:59,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:47:59,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:47:59,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 00:47:59,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:48:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:48:00,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:48:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:48:01,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849610562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:48:01,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:48:01,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 12] total 40 [2021-11-21 00:48:01,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3178914] [2021-11-21 00:48:01,511 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:48:01,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-21 00:48:01,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:48:01,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-21 00:48:01,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 00:48:01,513 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 40 states, 40 states have (on average 2.6) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:10,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:48:10,777 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-11-21 00:48:10,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-21 00:48:10,778 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.6) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-21 00:48:10,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:48:10,779 INFO L225 Difference]: With dead ends: 98 [2021-11-21 00:48:10,779 INFO L226 Difference]: Without dead ends: 84 [2021-11-21 00:48:10,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=756, Invalid=3800, Unknown=0, NotChecked=0, Total=4556 [2021-11-21 00:48:10,782 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 200 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:48:10,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 204 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 546 Invalid, 0 Unknown, 14 Unchecked, 2.8s Time] [2021-11-21 00:48:10,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-21 00:48:10,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2021-11-21 00:48:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 66 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:10,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2021-11-21 00:48:10,787 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 32 [2021-11-21 00:48:10,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:48:10,788 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2021-11-21 00:48:10,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.6) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:10,788 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2021-11-21 00:48:10,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 00:48:10,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:48:10,790 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-21 00:48:10,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-21 00:48:10,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-21 00:48:11,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-21 00:48:11,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:48:11,394 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:48:11,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:48:11,394 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-11-21 00:48:11,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:48:11,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165248055] [2021-11-21 00:48:11,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:48:11,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:48:11,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:48:11,395 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:48:11,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-21 00:48:11,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 00:48:11,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:48:11,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:48:11,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:48:11,534 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 8 treesize of output 7 [2021-11-21 00:48:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:48:12,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:48:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:48:16,421 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:48:16,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165248055] [2021-11-21 00:48:16,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165248055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:48:16,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1702149802] [2021-11-21 00:48:16,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:48:16,421 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:48:16,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:48:16,422 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:48:16,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-21 00:48:16,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 00:48:16,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:48:16,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 00:48:16,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:48:16,887 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 8 treesize of output 7 [2021-11-21 00:48:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:48:17,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:48:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:48:27,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1702149802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:48:27,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398309786] [2021-11-21 00:48:27,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:48:27,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:48:27,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:48:27,177 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:48:27,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-21 00:48:27,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 00:48:27,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:48:27,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:48:27,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:48:27,769 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 8 treesize of output 7 [2021-11-21 00:48:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:48:28,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:48:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:48:35,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398309786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:48:35,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:48:35,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 15, 15, 14, 14] total 51 [2021-11-21 00:48:35,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403172487] [2021-11-21 00:48:35,260 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:48:35,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-21 00:48:35,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:48:35,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-21 00:48:35,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=1919, Unknown=0, NotChecked=0, Total=2652 [2021-11-21 00:48:35,262 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 52 states, 51 states have (on average 2.9019607843137254) internal successors, (148), 52 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:48:39,992 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:48:42,507 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:48:44,552 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:48:53,685 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:48:55,688 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:48:57,781 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:04,681 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:06,463 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:18,040 INFO L93 Difference]: Finished difference Result 419 states and 431 transitions. [2021-11-21 00:49:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-21 00:49:18,041 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.9019607843137254) internal successors, (148), 52 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-21 00:49:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:18,043 INFO L225 Difference]: With dead ends: 419 [2021-11-21 00:49:18,043 INFO L226 Difference]: Without dead ends: 419 [2021-11-21 00:49:18,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2311 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=1532, Invalid=3724, Unknown=0, NotChecked=0, Total=5256 [2021-11-21 00:49:18,046 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 659 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 82 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:18,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 470 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 909 Invalid, 7 Unknown, 25 Unchecked, 20.7s Time] [2021-11-21 00:49:18,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-11-21 00:49:18,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 99. [2021-11-21 00:49:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 98 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:49:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2021-11-21 00:49:18,057 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 34 [2021-11-21 00:49:18,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:18,057 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2021-11-21 00:49:18,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.9019607843137254) internal successors, (148), 52 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:49:18,058 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2021-11-21 00:49:18,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 00:49:18,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:18,060 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:18,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-21 00:49:18,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-21 00:49:18,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:18,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:49:18,672 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:49:18,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:18,673 INFO L85 PathProgramCache]: Analyzing trace with hash -953948523, now seen corresponding path program 4 times [2021-11-21 00:49:18,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:49:18,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038003764] [2021-11-21 00:49:18,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:49:18,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:49:18,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:49:18,675 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:49:18,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-21 00:49:18,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:49:18,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:49:18,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-21 00:49:18,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:18,848 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 8 treesize of output 7 [2021-11-21 00:49:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 26 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:20,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:28,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:49:28,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038003764] [2021-11-21 00:49:28,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038003764] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:28,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [920052559] [2021-11-21 00:49:28,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:49:28,032 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:49:28,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:49:28,032 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:49:28,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-21 00:49:28,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:49:28,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:49:28,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 00:49:28,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:49:30,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:49:33,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [920052559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:33,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922350187] [2021-11-21 00:49:33,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:49:33,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:49:33,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:49:33,048 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:49:33,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-21 00:49:33,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:49:33,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:49:33,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-21 00:49:33,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:33,142 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 8 treesize of output 7 [2021-11-21 00:49:35,335 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 22 treesize of output 16 [2021-11-21 00:49:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:49:35,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:49:41,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922350187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:41,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:49:41,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 15, 14, 18, 17] total 82 [2021-11-21 00:49:41,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410548444] [2021-11-21 00:49:41,312 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:49:41,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-21 00:49:41,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:49:41,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-21 00:49:41,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=5996, Unknown=0, NotChecked=0, Total=6642 [2021-11-21 00:49:41,317 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 82 states, 82 states have (on average 2.8048780487804876) internal successors, (230), 82 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:50:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:25,062 INFO L93 Difference]: Finished difference Result 185 states and 196 transitions. [2021-11-21 00:50:25,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-21 00:50:25,065 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.8048780487804876) internal successors, (230), 82 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-21 00:50:25,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:25,068 INFO L225 Difference]: With dead ends: 185 [2021-11-21 00:50:25,068 INFO L226 Difference]: Without dead ends: 167 [2021-11-21 00:50:25,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 229 SyntacticMatches, 3 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 53.1s TimeCoverageRelationStatistics Valid=2124, Invalid=13128, Unknown=0, NotChecked=0, Total=15252 [2021-11-21 00:50:25,073 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 451 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:25,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 501 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1348 Invalid, 0 Unknown, 115 Unchecked, 7.7s Time] [2021-11-21 00:50:25,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-21 00:50:25,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 104. [2021-11-21 00:50:25,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 102 states have (on average 1.1274509803921569) internal successors, (115), 103 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:50:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2021-11-21 00:50:25,098 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 52 [2021-11-21 00:50:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:25,099 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2021-11-21 00:50:25,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.8048780487804876) internal successors, (230), 82 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:50:25,099 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2021-11-21 00:50:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-21 00:50:25,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:25,102 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:25,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-21 00:50:25,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-21 00:50:25,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-21 00:50:25,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:50:25,703 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:50:25,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:25,703 INFO L85 PathProgramCache]: Analyzing trace with hash -494970789, now seen corresponding path program 5 times [2021-11-21 00:50:25,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:50:25,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830591242] [2021-11-21 00:50:25,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 00:50:25,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:50:25,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:50:25,705 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:50:25,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-21 00:50:25,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-21 00:50:25,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:50:25,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-21 00:50:25,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:50:25,957 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 8 treesize of output 7 [2021-11-21 00:50:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 66 proven. 95 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:50:27,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:50:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:50:45,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:50:45,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830591242] [2021-11-21 00:50:45,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830591242] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:50:45,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1207389707] [2021-11-21 00:50:45,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 00:50:45,160 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:50:45,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:50:45,161 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:50:45,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-21 00:50:49,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-21 00:50:49,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:50:49,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:50:49,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:50:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 68 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:50:53,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:50:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 68 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:50:58,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1207389707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:50:58,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991591441] [2021-11-21 00:50:58,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 00:50:58,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:58,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:50:58,718 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:50:58,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-21 00:51:05,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-21 00:51:05,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:51:05,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 00:51:05,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:51:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 68 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:51:10,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:51:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 68 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:51:12,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991591441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:51:12,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:51:12,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28, 17, 16, 18, 16] total 97 [2021-11-21 00:51:12,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17549110] [2021-11-21 00:51:12,738 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:51:12,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-21 00:51:12,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:51:12,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-21 00:51:12,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=8615, Unknown=0, NotChecked=0, Total=9312 [2021-11-21 00:51:12,742 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand has 97 states, 97 states have (on average 2.7010309278350517) internal successors, (262), 97 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:51:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:28,788 INFO L93 Difference]: Finished difference Result 194 states and 204 transitions. [2021-11-21 00:51:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-21 00:51:28,790 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.7010309278350517) internal successors, (262), 97 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-21 00:51:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:28,791 INFO L225 Difference]: With dead ends: 194 [2021-11-21 00:51:28,791 INFO L226 Difference]: Without dead ends: 172 [2021-11-21 00:51:28,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4610 ImplicationChecksByTransitivity, 42.3s TimeCoverageRelationStatistics Valid=1264, Invalid=13988, Unknown=0, NotChecked=0, Total=15252 [2021-11-21 00:51:28,795 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 189 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:28,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 629 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 830 Invalid, 0 Unknown, 56 Unchecked, 3.3s Time] [2021-11-21 00:51:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-21 00:51:28,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 140. [2021-11-21 00:51:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 138 states have (on average 1.0942028985507246) internal successors, (151), 139 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:51:28,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 151 transitions. [2021-11-21 00:51:28,801 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 151 transitions. Word has length 60 [2021-11-21 00:51:28,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:28,802 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 151 transitions. [2021-11-21 00:51:28,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.7010309278350517) internal successors, (262), 97 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:51:28,802 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 151 transitions. [2021-11-21 00:51:28,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 00:51:28,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:28,804 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:28,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-21 00:51:29,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-21 00:51:29,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-21 00:51:29,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:51:29,418 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:51:29,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:29,418 INFO L85 PathProgramCache]: Analyzing trace with hash -749046242, now seen corresponding path program 6 times [2021-11-21 00:51:29,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:51:29,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531177888] [2021-11-21 00:51:29,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-21 00:51:29,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:51:29,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:51:29,419 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:51:29,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-21 00:51:29,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-21 00:51:29,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:51:29,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-21 00:51:29,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:51:29,743 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 8 treesize of output 7 [2021-11-21 00:51:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-21 00:51:31,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:51:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-21 00:51:41,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:51:41,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531177888] [2021-11-21 00:51:41,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531177888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:51:41,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1292062484] [2021-11-21 00:51:41,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-21 00:51:41,396 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:51:41,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:51:41,397 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:51:41,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-21 00:51:42,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-21 00:51:42,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:51:42,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-21 00:51:42,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:51:42,504 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 8 treesize of output 7 [2021-11-21 00:51:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-21 00:51:44,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:52:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-21 00:52:02,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1292062484] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:52:02,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118011166] [2021-11-21 00:52:02,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-21 00:52:02,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:52:02,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:52:02,252 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:52:02,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-21 00:52:04,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-21 00:52:04,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:52:04,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-21 00:52:04,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:52:04,225 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 8 treesize of output 7 [2021-11-21 00:52:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 7 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:52:10,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:52:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:52:33,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118011166] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:52:33,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:52:33,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 22, 22, 24, 27] total 94 [2021-11-21 00:52:33,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445467044] [2021-11-21 00:52:33,468 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:52:33,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-21 00:52:33,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:52:33,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-21 00:52:33,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1495, Invalid=7247, Unknown=0, NotChecked=0, Total=8742 [2021-11-21 00:52:33,470 INFO L87 Difference]: Start difference. First operand 140 states and 151 transitions. Second operand has 94 states, 94 states have (on average 2.425531914893617) internal successors, (228), 94 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:52:55,100 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:57,000 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:59,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:01,049 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:03,109 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:05,186 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:06,406 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:08,418 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:10,421 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:12,454 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:14,457 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:16,504 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:18,508 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:28,104 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:30,976 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:32,980 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:35,234 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:37,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:39,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:41,370 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:52,908 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:54,157 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:56,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:58,209 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:00,270 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:02,338 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:05,118 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:07,122 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:09,170 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:11,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:13,243 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:15,247 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:38,163 INFO L93 Difference]: Finished difference Result 229 states and 238 transitions. [2021-11-21 00:54:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-21 00:54:38,163 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.425531914893617) internal successors, (228), 94 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-21 00:54:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:38,165 INFO L225 Difference]: With dead ends: 229 [2021-11-21 00:54:38,165 INFO L226 Difference]: Without dead ends: 199 [2021-11-21 00:54:38,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 284 SyntacticMatches, 3 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8205 ImplicationChecksByTransitivity, 87.2s TimeCoverageRelationStatistics Valid=5184, Invalid=18996, Unknown=0, NotChecked=0, Total=24180 [2021-11-21 00:54:38,167 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 909 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 675 mSolverCounterUnsat, 29 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 3032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 29 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 79.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:38,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 767 Invalid, 3032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 2252 Invalid, 29 Unknown, 76 Unchecked, 79.0s Time] [2021-11-21 00:54:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-21 00:54:38,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 131. [2021-11-21 00:54:38,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 129 states have (on average 1.0852713178294573) internal successors, (140), 130 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:54:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 140 transitions. [2021-11-21 00:54:38,173 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 140 transitions. Word has length 64 [2021-11-21 00:54:38,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:38,173 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 140 transitions. [2021-11-21 00:54:38,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.425531914893617) internal successors, (228), 94 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:54:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 140 transitions. [2021-11-21 00:54:38,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 00:54:38,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:38,175 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2021-11-21 00:54:38,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-21 00:54:38,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-21 00:54:38,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2021-11-21 00:54:38,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 00:54:38,790 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:54:38,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:38,790 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2021-11-21 00:54:38,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:54:38,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747023193] [2021-11-21 00:54:38,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:54:38,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:54:38,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:54:38,792 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:54:38,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-21 00:54:38,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:54:38,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:54:38,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 00:54:38,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:54:38,956 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 8 treesize of output 7 [2021-11-21 00:54:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:54:41,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:54:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:54:54,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:54:54,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747023193] [2021-11-21 00:54:54,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747023193] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:54:54,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1217324370] [2021-11-21 00:54:54,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:54:54,132 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:54:54,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:54:54,132 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:54:54,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-21 00:54:54,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:54:54,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:54:54,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 00:54:54,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:54:54,368 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 8 treesize of output 7 [2021-11-21 00:54:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:54:55,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:55:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:55:07,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1217324370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:55:07,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457687245] [2021-11-21 00:55:07,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:55:07,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:07,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:55:07,423 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:55:07,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-21 00:55:07,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:55:07,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:55:07,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-21 00:55:07,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:55:07,529 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 8 treesize of output 7 [2021-11-21 00:55:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:55:10,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:55:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:55:32,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457687245] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:55:32,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:55:32,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 19, 19, 26, 26] total 105 [2021-11-21 00:55:32,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712962997] [2021-11-21 00:55:32,805 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:55:32,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-21 00:55:32,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:55:32,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-21 00:55:32,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2920, Invalid=8210, Unknown=0, NotChecked=0, Total=11130 [2021-11-21 00:55:32,808 INFO L87 Difference]: Start difference. First operand 131 states and 140 transitions. Second operand has 106 states, 105 states have (on average 3.104761904761905) internal successors, (326), 106 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:41,649 WARN L227 SmtUtils]: Spent 5.32s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:55:43,702 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:55:45,705 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:55:47,785 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:55:49,788 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:55:51,797 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:55:53,799 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:55:55,802 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:55:57,805 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:56:03,256 WARN L227 SmtUtils]: Spent 5.04s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:56:09,590 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:56:11,671 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:56:13,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:56:15,711 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:56:17,718 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:56:19,723 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:56:21,726 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:56:23,728 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:56:35,688 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:56:37,887 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:56:39,890 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:56:41,893 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:56:43,896 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:56:45,898 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:56:47,901 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:56:53,785 WARN L227 SmtUtils]: Spent 5.27s on a formula simplification that was a NOOP. DAG size: 134 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:56:59,244 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:01,357 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:03,359 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:05,362 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:07,402 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:09,405 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:11,412 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:22,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:24,843 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:26,847 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:28,851 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:30,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:32,895 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:41,226 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:43,229 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:45,232 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:47,234 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:49,291 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:51,294 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:57:58,508 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:00,625 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:02,629 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:04,664 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:06,667 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:13,458 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:15,461 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:17,118 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:19,122 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:24,992 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:26,996 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:28,998 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:34,852 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:36,377 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:38,380 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:43,717 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:45,720 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:50,767 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:58:57,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:58:57,585 INFO L93 Difference]: Finished difference Result 1667 states and 1692 transitions. [2021-11-21 00:58:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-21 00:58:57,587 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 3.104761904761905) internal successors, (326), 106 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-21 00:58:57,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:58:57,595 INFO L225 Difference]: With dead ends: 1667 [2021-11-21 00:58:57,596 INFO L226 Difference]: Without dead ends: 1667 [2021-11-21 00:58:57,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 116.3s TimeCoverageRelationStatistics Valid=5451, Invalid=14289, Unknown=0, NotChecked=0, Total=19740 [2021-11-21 00:58:57,598 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 2696 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 2710 mSolverCounterSat, 219 mSolverCounterUnsat, 56 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 126.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2696 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 2710 IncrementalHoareTripleChecker+Invalid, 56 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 127.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:58:57,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2696 Valid, 1392 Invalid, 3047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 2710 Invalid, 56 Unknown, 62 Unchecked, 127.1s Time] [2021-11-21 00:58:57,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2021-11-21 00:58:57,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 195. [2021-11-21 00:58:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 193 states have (on average 1.1398963730569949) internal successors, (220), 194 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:58:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 220 transitions. [2021-11-21 00:58:57,614 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 220 transitions. Word has length 66 [2021-11-21 00:58:57,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:58:57,614 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 220 transitions. [2021-11-21 00:58:57,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 3.104761904761905) internal successors, (326), 106 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:58:57,615 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 220 transitions. [2021-11-21 00:58:57,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-21 00:58:57,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:58:57,617 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:58:57,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-21 00:58:57,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-21 00:58:58,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-21 00:58:58,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 00:58:58,230 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-11-21 00:58:58,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:58:58,230 INFO L85 PathProgramCache]: Analyzing trace with hash 870591795, now seen corresponding path program 7 times [2021-11-21 00:58:58,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:58:58,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336251950] [2021-11-21 00:58:58,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:58:58,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:58:58,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:58:58,232 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:58:58,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-21 00:58:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:58:58,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-21 00:58:58,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:58:58,483 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 8 treesize of output 7 [2021-11-21 00:59:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 238 proven. 194 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-21 00:59:00,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:59:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:59:17,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:59:17,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336251950] [2021-11-21 00:59:17,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336251950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:59:17,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [627334633] [2021-11-21 00:59:17,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:59:17,480 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:59:17,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:59:17,481 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:59:17,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-21 00:59:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:17,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 00:59:17,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:59:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 231 proven. 132 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-21 00:59:22,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:59:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 231 proven. 132 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-21 00:59:28,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [627334633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:59:28,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311513824] [2021-11-21 00:59:28,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:59:28,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:28,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:28,396 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:28,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1fd8e0-9cdf-4602-bdb8-62ffbac6ec53/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-21 00:59:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:28,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-21 00:59:28,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:59:28,525 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 8 treesize of output 7 [2021-11-21 00:59:33,926 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 17 treesize of output 13 [2021-11-21 00:59:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 231 proven. 132 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-21 00:59:34,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:59:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 231 proven. 132 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-21 00:59:50,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311513824] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:59:50,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:59:50,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29, 20, 18, 24, 23] total 116 [2021-11-21 00:59:50,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32083970] [2021-11-21 00:59:50,614 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:59:50,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-21 00:59:50,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:59:50,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-21 00:59:50,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1033, Invalid=12307, Unknown=0, NotChecked=0, Total=13340 [2021-11-21 00:59:50,617 INFO L87 Difference]: Start difference. First operand 195 states and 220 transitions. Second operand has 116 states, 116 states have (on average 3.0086206896551726) internal successors, (349), 116 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)