./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2dcad53e9f7fd6e0b6384d19db4719ec6aa2601fd94c6ce0d3c746f1ec6b3601 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:53:17,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:53:17,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:53:17,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:53:17,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:53:17,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:53:17,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:53:17,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:53:17,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:53:17,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:53:17,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:53:17,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:53:17,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:53:17,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:53:17,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:53:17,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:53:17,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:53:17,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:53:17,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:53:17,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:53:17,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:53:17,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:53:17,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:53:17,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:53:17,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:53:17,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:53:17,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:53:17,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:53:17,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:53:17,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:53:17,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:53:17,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:53:17,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:53:17,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:53:17,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:53:17,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:53:17,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:53:17,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:53:17,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:53:17,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:53:17,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:53:17,172 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:53:17,205 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:53:17,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:53:17,207 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:53:17,207 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:53:17,208 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:53:17,208 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:53:17,209 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:53:17,209 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:53:17,210 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:53:17,210 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:53:17,210 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:53:17,211 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:53:17,211 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:53:17,212 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:53:17,212 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:53:17,212 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:53:17,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:53:17,214 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:53:17,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:53:17,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:53:17,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:53:17,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:53:17,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:53:17,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:53:17,217 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:53:17,217 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:53:17,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:53:17,218 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:53:17,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:53:17,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:53:17,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:53:17,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:53:17,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:53:17,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:53:17,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:53:17,221 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:53:17,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:53:17,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:53:17,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:53:17,223 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:53:17,223 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_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2dcad53e9f7fd6e0b6384d19db4719ec6aa2601fd94c6ce0d3c746f1ec6b3601 [2021-11-12 22:53:17,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:53:17,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:53:17,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:53:17,514 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:53:17,515 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:53:17,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i [2021-11-12 22:53:17,587 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/data/ac8398609/3276d51f51fa4d68abb2bd70054c13f5/FLAG9cea87680 [2021-11-12 22:53:18,277 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:53:18,283 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i [2021-11-12 22:53:18,310 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/data/ac8398609/3276d51f51fa4d68abb2bd70054c13f5/FLAG9cea87680 [2021-11-12 22:53:18,444 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/data/ac8398609/3276d51f51fa4d68abb2bd70054c13f5 [2021-11-12 22:53:18,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:53:18,448 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:53:18,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:18,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:53:18,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:53:18,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:18" (1/1) ... [2021-11-12 22:53:18,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@97a3885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:18, skipping insertion in model container [2021-11-12 22:53:18,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:18" (1/1) ... [2021-11-12 22:53:18,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:53:18,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:53:18,965 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i[33021,33034] [2021-11-12 22:53:19,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:19,126 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) [2021-11-12 22:53:19,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7a54415a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:19, skipping insertion in model container [2021-11-12 22:53:19,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:19,136 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:53:19,139 INFO L158 Benchmark]: Toolchain (without parser) took 688.56ms. Allocated memory was 113.2MB in the beginning and 151.0MB in the end (delta: 37.7MB). Free memory was 80.3MB in the beginning and 112.3MB in the end (delta: -32.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:53:19,140 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 113.2MB. Free memory is still 66.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:53:19,142 INFO L158 Benchmark]: CACSL2BoogieTranslator took 685.65ms. Allocated memory was 113.2MB in the beginning and 151.0MB in the end (delta: 37.7MB). Free memory was 80.0MB in the beginning and 112.3MB in the end (delta: -32.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:53:19,144 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 113.2MB. Free memory is still 66.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 685.65ms. Allocated memory was 113.2MB in the beginning and 151.0MB in the end (delta: 37.7MB). Free memory was 80.0MB in the beginning and 112.3MB in the end (delta: -32.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: 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_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2dcad53e9f7fd6e0b6384d19db4719ec6aa2601fd94c6ce0d3c746f1ec6b3601 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:53:21,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:53:21,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:53:21,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:53:21,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:53:21,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:53:21,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:53:21,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:53:21,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:53:21,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:53:21,592 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:53:21,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:53:21,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:53:21,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:53:21,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:53:21,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:53:21,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:53:21,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:53:21,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:53:21,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:53:21,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:53:21,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:53:21,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:53:21,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:53:21,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:53:21,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:53:21,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:53:21,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:53:21,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:53:21,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:53:21,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:53:21,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:53:21,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:53:21,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:53:21,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:53:21,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:53:21,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:53:21,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:53:21,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:53:21,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:53:21,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:53:21,660 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:53:21,708 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:53:21,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:53:21,709 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:53:21,709 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:53:21,709 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:53:21,709 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:53:21,710 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:53:21,710 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:53:21,710 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:53:21,710 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:53:21,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:53:21,711 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:53:21,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:53:21,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:53:21,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:53:21,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:53:21,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:53:21,712 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:53:21,712 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:53:21,713 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:53:21,713 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:53:21,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:53:21,713 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:53:21,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:53:21,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:53:21,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:53:21,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:53:21,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:53:21,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:53:21,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:53:21,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:53:21,714 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:53:21,715 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:21,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:53:21,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:53:21,715 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:53:21,715 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_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2dcad53e9f7fd6e0b6384d19db4719ec6aa2601fd94c6ce0d3c746f1ec6b3601 [2021-11-12 22:53:22,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:53:22,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:53:22,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:53:22,176 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:53:22,177 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:53:22,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i [2021-11-12 22:53:22,263 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/data/b85deb769/281e06952ce345ceb5eca35e05f8f0c6/FLAG739d4cf68 [2021-11-12 22:53:22,983 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:53:22,983 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i [2021-11-12 22:53:23,014 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/data/b85deb769/281e06952ce345ceb5eca35e05f8f0c6/FLAG739d4cf68 [2021-11-12 22:53:23,202 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/data/b85deb769/281e06952ce345ceb5eca35e05f8f0c6 [2021-11-12 22:53:23,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:53:23,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:53:23,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:23,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:53:23,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:53:23,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:23" (1/1) ... [2021-11-12 22:53:23,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32a267b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:23, skipping insertion in model container [2021-11-12 22:53:23,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:23" (1/1) ... [2021-11-12 22:53:23,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:53:23,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:53:23,867 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i[33021,33034] [2021-11-12 22:53:24,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:24,107 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:53:24,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:53:24,140 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i[33021,33034] [2021-11-12 22:53:24,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:24,229 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:53:24,273 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-3.i[33021,33034] [2021-11-12 22:53:24,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:24,398 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:53:24,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:24 WrapperNode [2021-11-12 22:53:24,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:24,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:53:24,400 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:53:24,400 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:53:24,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:24" (1/1) ... [2021-11-12 22:53:24,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:24" (1/1) ... [2021-11-12 22:53:24,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:53:24,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:53:24,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:53:24,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:53:24,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:24" (1/1) ... [2021-11-12 22:53:24,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:24" (1/1) ... [2021-11-12 22:53:24,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:24" (1/1) ... [2021-11-12 22:53:24,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:24" (1/1) ... [2021-11-12 22:53:24,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:24" (1/1) ... [2021-11-12 22:53:24,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:24" (1/1) ... [2021-11-12 22:53:24,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:24" (1/1) ... [2021-11-12 22:53:24,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:53:24,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:53:24,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:53:24,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:53:24,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:24" (1/1) ... [2021-11-12 22:53:24,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:53:24,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:53:24,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:53:24,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:53:24,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:53:24,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:53:24,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:53:24,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:53:24,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 22:53:24,792 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 22:53:24,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:53:24,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:53:24,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:53:24,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:53:24,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:53:24,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:53:24,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:53:24,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:53:24,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:53:36,137 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:53:36,138 INFO L299 CfgBuilder]: Removed 77 assume(true) statements. [2021-11-12 22:53:36,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:53:36 BoogieIcfgContainer [2021-11-12 22:53:36,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:53:36,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:53:36,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:53:36,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:53:36,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:53:23" (1/3) ... [2021-11-12 22:53:36,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1303c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:53:36, skipping insertion in model container [2021-11-12 22:53:36,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:24" (2/3) ... [2021-11-12 22:53:36,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1303c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:53:36, skipping insertion in model container [2021-11-12 22:53:36,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:53:36" (3/3) ... [2021-11-12 22:53:36,150 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test4-3.i [2021-11-12 22:53:36,155 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:53:36,155 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:53:36,205 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:53:36,212 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-11-12 22:53:36,212 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:53:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 261 states, 241 states have (on average 1.6887966804979253) internal successors, (407), 252 states have internal predecessors, (407), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 22:53:36,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-12 22:53:36,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:36,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:36,268 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:36,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:36,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1523630084, now seen corresponding path program 1 times [2021-11-12 22:53:36,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:36,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279734522] [2021-11-12 22:53:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:36,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:36,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:36,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:36,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:53:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:36,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:53:36,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:36,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:36,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:36,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279734522] [2021-11-12 22:53:36,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279734522] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:36,761 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:36,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:53:36,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410771762] [2021-11-12 22:53:36,763 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:36,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:53:36,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:36,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:53:36,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:53:36,813 INFO L87 Difference]: Start difference. First operand has 261 states, 241 states have (on average 1.6887966804979253) internal successors, (407), 252 states have internal predecessors, (407), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:37,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:37,194 INFO L93 Difference]: Finished difference Result 691 states and 1180 transitions. [2021-11-12 22:53:37,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:53:37,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-12 22:53:37,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:37,212 INFO L225 Difference]: With dead ends: 691 [2021-11-12 22:53:37,212 INFO L226 Difference]: Without dead ends: 378 [2021-11-12 22:53:37,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:53:37,221 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 601 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 254.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.03ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 280.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:37,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 732 Invalid, 22 Unknown, 0 Unchecked, 13.03ms Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 280.43ms Time] [2021-11-12 22:53:37,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-12 22:53:37,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-11-12 22:53:37,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 353 states have (on average 1.3087818696883853) internal successors, (462), 363 states have internal predecessors, (462), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-12 22:53:37,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 506 transitions. [2021-11-12 22:53:37,302 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 506 transitions. Word has length 10 [2021-11-12 22:53:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:37,302 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 506 transitions. [2021-11-12 22:53:37,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 506 transitions. [2021-11-12 22:53:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-12 22:53:37,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:37,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:37,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:37,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:37,533 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:37,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:37,534 INFO L85 PathProgramCache]: Analyzing trace with hash 930997070, now seen corresponding path program 1 times [2021-11-12 22:53:37,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:37,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523149002] [2021-11-12 22:53:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:37,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:37,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:37,542 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:37,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:53:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:38,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:38,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:53:38,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:53:39,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:39,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523149002] [2021-11-12 22:53:39,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523149002] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:39,396 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:39,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:53:39,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905083774] [2021-11-12 22:53:39,397 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:39,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:39,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:39,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:39,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:53:39,400 INFO L87 Difference]: Start difference. First operand 378 states and 506 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:39,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:39,542 INFO L93 Difference]: Finished difference Result 756 states and 1018 transitions. [2021-11-12 22:53:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:53:39,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-12 22:53:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:39,555 INFO L225 Difference]: With dead ends: 756 [2021-11-12 22:53:39,555 INFO L226 Difference]: Without dead ends: 386 [2021-11-12 22:53:39,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:53:39,562 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 225 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.82ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.97ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:39,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 567 Invalid, 69 Unknown, 0 Unchecked, 4.82ms Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 93.97ms Time] [2021-11-12 22:53:39,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-12 22:53:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 384. [2021-11-12 22:53:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 359 states have (on average 1.2590529247910864) internal successors, (452), 369 states have internal predecessors, (452), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-12 22:53:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 496 transitions. [2021-11-12 22:53:39,638 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 496 transitions. Word has length 206 [2021-11-12 22:53:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:39,639 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 496 transitions. [2021-11-12 22:53:39,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 496 transitions. [2021-11-12 22:53:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-12 22:53:39,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:39,651 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:39,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:39,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:39,871 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:39,872 INFO L85 PathProgramCache]: Analyzing trace with hash 2112529974, now seen corresponding path program 1 times [2021-11-12 22:53:39,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:39,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371231233] [2021-11-12 22:53:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:39,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:39,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:39,877 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:39,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:53:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:40,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:40,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 22:53:41,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 22:53:41,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:41,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371231233] [2021-11-12 22:53:41,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371231233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:41,919 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:41,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:53:41,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863489959] [2021-11-12 22:53:41,920 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:41,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:53:41,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:41,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:53:41,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:53:41,922 INFO L87 Difference]: Start difference. First operand 384 states and 496 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:42,426 INFO L93 Difference]: Finished difference Result 713 states and 930 transitions. [2021-11-12 22:53:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:42,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-12 22:53:42,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:42,438 INFO L225 Difference]: With dead ends: 713 [2021-11-12 22:53:42,438 INFO L226 Difference]: Without dead ends: 382 [2021-11-12 22:53:42,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:53:42,440 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 11 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 473.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 483.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:42,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 523 Invalid, 8 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 483.75ms Time] [2021-11-12 22:53:42,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-12 22:53:42,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2021-11-12 22:53:42,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 357 states have (on average 1.257703081232493) internal successors, (449), 367 states have internal predecessors, (449), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-12 22:53:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 493 transitions. [2021-11-12 22:53:42,461 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 493 transitions. Word has length 206 [2021-11-12 22:53:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:42,461 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 493 transitions. [2021-11-12 22:53:42,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 493 transitions. [2021-11-12 22:53:42,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-12 22:53:42,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:42,466 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:42,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 22:53:42,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:42,688 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:42,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:42,688 INFO L85 PathProgramCache]: Analyzing trace with hash 2039357527, now seen corresponding path program 1 times [2021-11-12 22:53:42,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:42,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821281099] [2021-11-12 22:53:42,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:42,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:42,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:42,692 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:42,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:53:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:43,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:43,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-12 22:53:43,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 22:53:44,446 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:44,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821281099] [2021-11-12 22:53:44,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821281099] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:53:44,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:53:44,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:53:44,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296203995] [2021-11-12 22:53:44,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:44,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:53:44,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:44,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:53:44,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:53:44,449 INFO L87 Difference]: Start difference. First operand 382 states and 493 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:53:44,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:44,548 INFO L93 Difference]: Finished difference Result 720 states and 949 transitions. [2021-11-12 22:53:44,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:53:44,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 221 [2021-11-12 22:53:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:44,556 INFO L225 Difference]: With dead ends: 720 [2021-11-12 22:53:44,556 INFO L226 Difference]: Without dead ends: 385 [2021-11-12 22:53:44,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:53:44,569 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 2 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.97ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.56ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:44,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 791 Invalid, 21 Unknown, 0 Unchecked, 2.97ms Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 66.56ms Time] [2021-11-12 22:53:44,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-12 22:53:44,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2021-11-12 22:53:44,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 359 states have (on average 1.2590529247910864) internal successors, (452), 370 states have internal predecessors, (452), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-12 22:53:44,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 500 transitions. [2021-11-12 22:53:44,608 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 500 transitions. Word has length 221 [2021-11-12 22:53:44,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:44,608 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 500 transitions. [2021-11-12 22:53:44,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:53:44,612 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 500 transitions. [2021-11-12 22:53:44,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-12 22:53:44,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:44,618 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:44,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:44,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:44,832 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:44,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:44,832 INFO L85 PathProgramCache]: Analyzing trace with hash -428528199, now seen corresponding path program 1 times [2021-11-12 22:53:44,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:44,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931535487] [2021-11-12 22:53:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:44,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:44,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:44,835 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:44,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:53:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:45,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:45,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 22:53:45,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 22:53:46,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:46,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931535487] [2021-11-12 22:53:46,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931535487] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:46,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1727065347] [2021-11-12 22:53:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:46,553 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:46,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:46,556 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:46,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-12 22:53:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:47,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:53:47,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:53:47,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:53:48,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1727065347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:48,638 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:48,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 10] imperfect sequences [5, 5] total 16 [2021-11-12 22:53:48,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158145001] [2021-11-12 22:53:48,638 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:48,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:53:48,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:48,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:53:48,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:53:48,642 INFO L87 Difference]: Start difference. First operand 385 states and 500 transitions. Second operand has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:53:48,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:48,901 INFO L93 Difference]: Finished difference Result 716 states and 946 transitions. [2021-11-12 22:53:48,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:53:48,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 223 [2021-11-12 22:53:48,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:48,906 INFO L225 Difference]: With dead ends: 716 [2021-11-12 22:53:48,906 INFO L226 Difference]: Without dead ends: 431 [2021-11-12 22:53:48,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 874 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:53:48,908 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 44 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 167.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.17ms SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 231.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:48,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 939 Invalid, 186 Unknown, 0 Unchecked, 4.17ms Time], IncrementalHoareTripleChecker [86 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 231.21ms Time] [2021-11-12 22:53:48,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-11-12 22:53:48,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 425. [2021-11-12 22:53:48,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 399 states have (on average 1.2330827067669172) internal successors, (492), 410 states have internal predecessors, (492), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-12 22:53:48,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 540 transitions. [2021-11-12 22:53:48,929 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 540 transitions. Word has length 223 [2021-11-12 22:53:48,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:48,930 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 540 transitions. [2021-11-12 22:53:48,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:53:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 540 transitions. [2021-11-12 22:53:48,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-12 22:53:48,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:48,949 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:48,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:49,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-12 22:53:49,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:49,372 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:49,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:49,373 INFO L85 PathProgramCache]: Analyzing trace with hash 188730933, now seen corresponding path program 1 times [2021-11-12 22:53:49,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:49,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408789328] [2021-11-12 22:53:49,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:49,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:49,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:49,375 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:49,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:53:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:49,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:49,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 22:53:50,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 22:53:50,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:50,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408789328] [2021-11-12 22:53:50,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408789328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:50,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1447395786] [2021-11-12 22:53:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:50,919 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:50,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:50,920 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:50,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 22:53:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:51,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:51,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:53:52,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 22:53:54,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1447395786] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:54,307 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:54,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 22:53:54,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124461363] [2021-11-12 22:53:54,308 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:54,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:53:54,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:54,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:53:54,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:54,310 INFO L87 Difference]: Start difference. First operand 425 states and 540 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:53:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:54,674 INFO L93 Difference]: Finished difference Result 694 states and 890 transitions. [2021-11-12 22:53:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:54,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 223 [2021-11-12 22:53:54,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:54,679 INFO L225 Difference]: With dead ends: 694 [2021-11-12 22:53:54,679 INFO L226 Difference]: Without dead ends: 423 [2021-11-12 22:53:54,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 881 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:54,681 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 60 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 328.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.93ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 345.56ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:54,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 525 Invalid, 9 Unknown, 0 Unchecked, 1.93ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 345.56ms Time] [2021-11-12 22:53:54,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-12 22:53:54,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2021-11-12 22:53:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 397 states have (on average 1.2317380352644836) internal successors, (489), 408 states have internal predecessors, (489), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-12 22:53:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 537 transitions. [2021-11-12 22:53:54,700 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 537 transitions. Word has length 223 [2021-11-12 22:53:54,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:54,701 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 537 transitions. [2021-11-12 22:53:54,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:53:54,702 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 537 transitions. [2021-11-12 22:53:54,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-12 22:53:54,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:54,706 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:54,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:54,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:55,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:55,120 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:55,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:55,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1944112150, now seen corresponding path program 1 times [2021-11-12 22:53:55,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:55,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90206411] [2021-11-12 22:53:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:55,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:55,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:55,123 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:55,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:53:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:55,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:55,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 22:53:56,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 22:53:56,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:56,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90206411] [2021-11-12 22:53:56,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90206411] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:56,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [893959876] [2021-11-12 22:53:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:56,726 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:56,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:56,733 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:56,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 22:53:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:57,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:53:57,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-12 22:53:57,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 22:53:58,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [893959876] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:58,187 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:58,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-12 22:53:58,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206748865] [2021-11-12 22:53:58,188 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:58,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:53:58,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:58,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:53:58,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:53:58,190 INFO L87 Difference]: Start difference. First operand 423 states and 537 transitions. Second operand has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 22:53:58,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:58,383 INFO L93 Difference]: Finished difference Result 722 states and 931 transitions. [2021-11-12 22:53:58,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:53:58,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 240 [2021-11-12 22:53:58,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:58,387 INFO L225 Difference]: With dead ends: 722 [2021-11-12 22:53:58,387 INFO L226 Difference]: Without dead ends: 391 [2021-11-12 22:53:58,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 945 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:53:58,389 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 411 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.59ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 168.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:58,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 1113 Invalid, 118 Unknown, 0 Unchecked, 4.59ms Time], IncrementalHoareTripleChecker [50 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 168.12ms Time] [2021-11-12 22:53:58,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-12 22:53:58,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 389. [2021-11-12 22:53:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 363 states have (on average 1.1928374655647382) internal successors, (433), 374 states have internal predecessors, (433), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-12 22:53:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 481 transitions. [2021-11-12 22:53:58,410 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 481 transitions. Word has length 240 [2021-11-12 22:53:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:58,410 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 481 transitions. [2021-11-12 22:53:58,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 22:53:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 481 transitions. [2021-11-12 22:53:58,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-12 22:53:58,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:58,415 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:58,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:58,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:58,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:58,828 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:58,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:58,828 INFO L85 PathProgramCache]: Analyzing trace with hash 678967446, now seen corresponding path program 1 times [2021-11-12 22:53:58,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:58,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469652979] [2021-11-12 22:53:58,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:58,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:58,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:58,830 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:58,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:53:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:59,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:59,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 22:53:59,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 22:54:00,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:00,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469652979] [2021-11-12 22:54:00,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469652979] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:00,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [983730124] [2021-11-12 22:54:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:00,269 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:00,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:54:00,270 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:54:00,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 22:54:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:01,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:54:01,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 22:54:01,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 22:54:02,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [983730124] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:02,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626631916] [2021-11-12 22:54:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:02,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:54:02,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:54:02,038 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:54:02,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-12 22:54:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:02,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:54:02,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 22:54:03,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 22:54:04,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626631916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:04,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:54:04,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-12 22:54:04,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196149786] [2021-11-12 22:54:04,201 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:54:04,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:54:04,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:04,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:54:04,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:54:04,204 INFO L87 Difference]: Start difference. First operand 389 states and 481 transitions. Second operand has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:54:07,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:07,097 INFO L93 Difference]: Finished difference Result 1446 states and 1829 transitions. [2021-11-12 22:54:07,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:54:07,098 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 240 [2021-11-12 22:54:07,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:07,106 INFO L225 Difference]: With dead ends: 1446 [2021-11-12 22:54:07,106 INFO L226 Difference]: Without dead ends: 1104 [2021-11-12 22:54:07,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1443 GetRequests, 1424 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:54:07,108 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 1477 mSDsluCounter, 5027 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2381.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 5669 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.66ms SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2619.98ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:07,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1513 Valid, 5669 Invalid, 664 Unknown, 0 Unchecked, 20.66ms Time], IncrementalHoareTripleChecker [124 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 2619.98ms Time] [2021-11-12 22:54:07,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-11-12 22:54:07,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1102. [2021-11-12 22:54:07,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1051 states have (on average 1.1826831588962892) internal successors, (1243), 1062 states have internal predecessors, (1243), 46 states have call successors, (46), 3 states have call predecessors, (46), 4 states have return successors, (58), 37 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-12 22:54:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1347 transitions. [2021-11-12 22:54:07,154 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1347 transitions. Word has length 240 [2021-11-12 22:54:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:07,154 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1347 transitions. [2021-11-12 22:54:07,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:54:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1347 transitions. [2021-11-12 22:54:07,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-11-12 22:54:07,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:07,176 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:07,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:07,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:07,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-12 22:54:07,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:07,796 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:07,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:07,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1071950454, now seen corresponding path program 2 times [2021-11-12 22:54:07,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:07,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751704602] [2021-11-12 22:54:07,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:54:07,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:07,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:07,801 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:07,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:54:09,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:54:09,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:54:09,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:54:09,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-12 22:54:10,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-12 22:54:11,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:11,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751704602] [2021-11-12 22:54:11,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751704602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:11,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [92318909] [2021-11-12 22:54:11,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:54:11,735 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:11,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:54:11,735 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:54:11,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 22:54:13,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:54:13,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:54:13,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:54:13,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-12 22:54:14,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-12 22:54:15,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [92318909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:15,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270298396] [2021-11-12 22:54:15,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:54:15,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:54:15,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:54:15,976 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:54:15,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-12 22:54:16,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:54:16,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:54:17,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:54:17,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 274 proven. 3 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2021-11-12 22:54:18,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 198 proven. 31 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-12 22:54:19,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270298396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:19,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:54:19,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-12 22:54:19,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175873709] [2021-11-12 22:54:19,434 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:54:19,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:54:19,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:19,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:54:19,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:54:19,438 INFO L87 Difference]: Start difference. First operand 1102 states and 1347 transitions. Second operand has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:20,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:20,959 INFO L93 Difference]: Finished difference Result 2183 states and 2805 transitions. [2021-11-12 22:54:20,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-12 22:54:20,960 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 640 [2021-11-12 22:54:20,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:20,967 INFO L225 Difference]: With dead ends: 2183 [2021-11-12 22:54:20,967 INFO L226 Difference]: Without dead ends: 1122 [2021-11-12 22:54:20,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3859 GetRequests, 3816 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 22:54:20,971 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 144 mSDsluCounter, 2233 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 566.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 2489 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.33ms SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 638.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:20,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 2489 Invalid, 426 Unknown, 0 Unchecked, 6.33ms Time], IncrementalHoareTripleChecker [111 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 638.58ms Time] [2021-11-12 22:54:20,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-11-12 22:54:21,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1114. [2021-11-12 22:54:21,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1063 states have (on average 1.1843838193791156) internal successors, (1259), 1074 states have internal predecessors, (1259), 46 states have call successors, (46), 3 states have call predecessors, (46), 4 states have return successors, (58), 37 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-12 22:54:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1363 transitions. [2021-11-12 22:54:21,018 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1363 transitions. Word has length 640 [2021-11-12 22:54:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:21,018 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1363 transitions. [2021-11-12 22:54:21,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:21,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1363 transitions. [2021-11-12 22:54:21,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2021-11-12 22:54:21,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:21,027 INFO L514 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:21,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:21,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-12 22:54:21,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-12 22:54:21,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:21,652 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:21,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:21,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1097680246, now seen corresponding path program 3 times [2021-11-12 22:54:21,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:21,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572322323] [2021-11-12 22:54:21,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:54:21,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:21,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:21,656 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:21,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80568e9c-c1d7-4791-9796-b83f0a71b242/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process