./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/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_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:20:38,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:20:38,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:20:38,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:20:38,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:20:38,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:20:38,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:20:38,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:20:38,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:20:38,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:20:38,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:20:38,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:20:38,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:20:38,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:20:38,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:20:38,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:20:38,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:20:38,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:20:38,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:20:38,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:20:38,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:20:38,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:20:38,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:20:38,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:20:38,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:20:38,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:20:38,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:20:38,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:20:38,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:20:38,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:20:38,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:20:38,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:20:38,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:20:38,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:20:38,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:20:38,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:20:38,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:20:38,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:20:38,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:20:38,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:20:38,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:20:38,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-12 23:20:38,213 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:20:38,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:20:38,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:20:38,215 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:20:38,215 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:20:38,215 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:20:38,216 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:20:38,216 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:20:38,216 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:20:38,216 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:20:38,217 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:20:38,217 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:20:38,217 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:20:38,217 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:20:38,218 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:20:38,218 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:20:38,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-12 23:20:38,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-12 23:20:38,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:20:38,219 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:20:38,220 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-12 23:20:38,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:20:38,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:20:38,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:20:38,221 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-12 23:20:38,221 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-12 23:20:38,221 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-12 23:20:38,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:20:38,222 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:20:38,222 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:20:38,222 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:20:38,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:20:38,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:20:38,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:20:38,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:20:38,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:20:38,233 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:20:38,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:20:38,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:20:38,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:20:38,234 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_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e [2021-11-12 23:20:38,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:20:38,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:20:38,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:20:38,539 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:20:38,540 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:20:38,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2021-11-12 23:20:38,612 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/data/6f498e941/a69418537cb14d04b46eb8e862a97b7b/FLAG9878f93dc [2021-11-12 23:20:39,373 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:20:39,373 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2021-11-12 23:20:39,395 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/data/6f498e941/a69418537cb14d04b46eb8e862a97b7b/FLAG9878f93dc [2021-11-12 23:20:39,528 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/data/6f498e941/a69418537cb14d04b46eb8e862a97b7b [2021-11-12 23:20:39,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:20:39,532 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:20:39,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:20:39,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:20:39,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:20:39,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:20:39" (1/1) ... [2021-11-12 23:20:39,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28e9fa36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:39, skipping insertion in model container [2021-11-12 23:20:39,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:20:39" (1/1) ... [2021-11-12 23:20:39,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:20:39,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:20:40,160 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_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2021-11-12 23:20:40,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:20:40,559 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 23:20:40,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4f81e881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:40, skipping insertion in model container [2021-11-12 23:20:40,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:20:40,561 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:20:40,563 INFO L158 Benchmark]: Toolchain (without parser) took 1029.27ms. Allocated memory was 104.9MB in the beginning and 136.3MB in the end (delta: 31.5MB). Free memory was 73.9MB in the beginning and 106.0MB in the end (delta: -32.1MB). Peak memory consumption was 37.4MB. Max. memory is 16.1GB. [2021-11-12 23:20:40,564 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 104.9MB. Free memory is still 76.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:20:40,566 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1026.66ms. Allocated memory was 104.9MB in the beginning and 136.3MB in the end (delta: 31.5MB). Free memory was 73.7MB in the beginning and 106.0MB in the end (delta: -32.2MB). Peak memory consumption was 37.4MB. Max. memory is 16.1GB. [2021-11-12 23:20:40,568 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 104.9MB. Free memory is still 76.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1026.66ms. Allocated memory was 104.9MB in the beginning and 136.3MB in the end (delta: 31.5MB). Free memory was 73.7MB in the beginning and 106.0MB in the end (delta: -32.2MB). Peak memory consumption was 37.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/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_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:20:43,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:20:43,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:20:43,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:20:43,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:20:43,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:20:43,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:20:43,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:20:43,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:20:43,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:20:43,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:20:43,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:20:43,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:20:43,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:20:43,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:20:43,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:20:43,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:20:43,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:20:43,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:20:43,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:20:43,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:20:43,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:20:43,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:20:43,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:20:43,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:20:43,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:20:43,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:20:43,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:20:43,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:20:43,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:20:43,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:20:43,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:20:43,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:20:43,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:20:43,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:20:43,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:20:43,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:20:43,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:20:43,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:20:43,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:20:43,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:20:43,406 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-12 23:20:43,460 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:20:43,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:20:43,462 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:20:43,463 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:20:43,463 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:20:43,463 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:20:43,464 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:20:43,464 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:20:43,464 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:20:43,464 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:20:43,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-12 23:20:43,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-12 23:20:43,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:20:43,468 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:20:43,468 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-12 23:20:43,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:20:43,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:20:43,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:20:43,469 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-12 23:20:43,469 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-12 23:20:43,469 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-12 23:20:43,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:20:43,470 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:20:43,470 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:20:43,470 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:20:43,471 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:20:43,471 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:20:43,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:20:43,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:20:43,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:20:43,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:20:43,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:20:43,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:20:43,473 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:20:43,473 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:20:43,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:20:43,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:20:43,474 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_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e [2021-11-12 23:20:43,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:20:43,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:20:43,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:20:43,958 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:20:43,958 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:20:43,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2021-11-12 23:20:44,039 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/data/a0813adad/6767481ca8e144e7ae4cc850f39608a5/FLAGcb45fa35f [2021-11-12 23:20:44,923 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:20:44,923 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2021-11-12 23:20:44,947 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/data/a0813adad/6767481ca8e144e7ae4cc850f39608a5/FLAGcb45fa35f [2021-11-12 23:20:45,053 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/data/a0813adad/6767481ca8e144e7ae4cc850f39608a5 [2021-11-12 23:20:45,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:20:45,057 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:20:45,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:20:45,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:20:45,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:20:45,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:20:45" (1/1) ... [2021-11-12 23:20:45,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27dee617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:45, skipping insertion in model container [2021-11-12 23:20:45,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:20:45" (1/1) ... [2021-11-12 23:20:45,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:20:45,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:20:45,675 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_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2021-11-12 23:20:46,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:20:46,027 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:20:46,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:20:46,070 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_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2021-11-12 23:20:46,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:20:46,247 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:20:46,302 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_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2021-11-12 23:20:46,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:20:46,552 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:20:46,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:46 WrapperNode [2021-11-12 23:20:46,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:20:46,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:20:46,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:20:46,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:20:46,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:46" (1/1) ... [2021-11-12 23:20:46,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:46" (1/1) ... [2021-11-12 23:20:46,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:20:46,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:20:46,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:20:46,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:20:46,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:46" (1/1) ... [2021-11-12 23:20:46,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:46" (1/1) ... [2021-11-12 23:20:46,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:46" (1/1) ... [2021-11-12 23:20:46,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:46" (1/1) ... [2021-11-12 23:20:46,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:46" (1/1) ... [2021-11-12 23:20:47,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:46" (1/1) ... [2021-11-12 23:20:47,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:46" (1/1) ... [2021-11-12 23:20:47,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:20:47,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:20:47,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:20:47,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:20:47,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:46" (1/1) ... [2021-11-12 23:20:47,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:20:47,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:20:47,122 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:20:47,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:20:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:20:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-11-12 23:20:47,189 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-11-12 23:20:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:20:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:20:47,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:20:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:20:47,190 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:20:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:20:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:20:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:20:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 23:20:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:20:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:20:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:20:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:20:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:20:47,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:20:47,669 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 23:20:59,185 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:20:59,186 INFO L299 CfgBuilder]: Removed 168 assume(true) statements. [2021-11-12 23:20:59,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:20:59 BoogieIcfgContainer [2021-11-12 23:20:59,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:20:59,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:20:59,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:20:59,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:20:59,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:20:45" (1/3) ... [2021-11-12 23:20:59,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e1490e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:20:59, skipping insertion in model container [2021-11-12 23:20:59,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:46" (2/3) ... [2021-11-12 23:20:59,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e1490e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:20:59, skipping insertion in model container [2021-11-12 23:20:59,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:20:59" (3/3) ... [2021-11-12 23:20:59,212 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test10-3.i [2021-11-12 23:20:59,218 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:20:59,219 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1193 error locations. [2021-11-12 23:20:59,289 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:20:59,305 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:20:59,306 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1193 error locations. [2021-11-12 23:20:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 2437 states, 1232 states have (on average 2.2280844155844157) internal successors, (2745), 2423 states have internal predecessors, (2745), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-12 23:20:59,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-12 23:20:59,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:59,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-12 23:20:59,383 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:20:59,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2021-11-12 23:20:59,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:59,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841496276] [2021-11-12 23:20:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:59,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:59,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:59,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:59,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:20:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:59,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:20:59,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:59,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:20:59,825 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 23:20:59,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:59,864 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 23:20:59,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:59,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841496276] [2021-11-12 23:20:59,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841496276] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:59,867 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:59,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:20:59,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888207437] [2021-11-12 23:20:59,870 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:59,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:20:59,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:59,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:20:59,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:20:59,913 INFO L87 Difference]: Start difference. First operand has 2437 states, 1232 states have (on average 2.2280844155844157) internal successors, (2745), 2423 states have internal predecessors, (2745), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:05,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:05,856 INFO L93 Difference]: Finished difference Result 3281 states and 3483 transitions. [2021-11-12 23:21:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:21:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-12 23:21:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:05,898 INFO L225 Difference]: With dead ends: 3281 [2021-11-12 23:21:05,899 INFO L226 Difference]: Without dead ends: 3279 [2021-11-12 23:21:05,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 23:21:05,904 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 2318 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4835.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2328 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.37ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5710.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:05,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2328 Valid, 2230 Invalid, 1684 Unknown, 0 Unchecked, 40.37ms Time], IncrementalHoareTripleChecker [23 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 5710.08ms Time] [2021-11-12 23:21:05,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-11-12 23:21:06,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2579. [2021-11-12 23:21:06,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 1398 states have (on average 2.067238912732475) internal successors, (2890), 2563 states have internal predecessors, (2890), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:21:06,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 2922 transitions. [2021-11-12 23:21:06,145 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 2922 transitions. Word has length 3 [2021-11-12 23:21:06,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:06,146 INFO L470 AbstractCegarLoop]: Abstraction has 2579 states and 2922 transitions. [2021-11-12 23:21:06,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:06,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 2922 transitions. [2021-11-12 23:21:06,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-12 23:21:06,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:06,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-12 23:21:06,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:06,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:06,371 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:21:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:06,373 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2021-11-12 23:21:06,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:06,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677865157] [2021-11-12 23:21:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:06,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:06,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:06,381 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:06,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:21:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:06,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:21:06,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:06,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:21:06,664 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 23:21:06,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:06,726 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 23:21:06,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:06,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677865157] [2021-11-12 23:21:06,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677865157] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:06,728 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:06,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-12 23:21:06,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766134719] [2021-11-12 23:21:06,728 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:06,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:21:06,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:06,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:21:06,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:06,731 INFO L87 Difference]: Start difference. First operand 2579 states and 2922 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:19,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:19,062 INFO L93 Difference]: Finished difference Result 4057 states and 4519 transitions. [2021-11-12 23:21:19,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:21:19,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-12 23:21:19,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:19,084 INFO L225 Difference]: With dead ends: 4057 [2021-11-12 23:21:19,084 INFO L226 Difference]: Without dead ends: 4057 [2021-11-12 23:21:19,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 23:21:19,087 INFO L933 BasicCegarLoop]: 1776 mSDtfsCounter, 3042 mSDsluCounter, 1932 mSDsCounter, 0 mSdLazyCounter, 2497 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10653.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3050 SdHoareTripleChecker+Valid, 3708 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.52ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12165.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:19,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3050 Valid, 3708 Invalid, 2520 Unknown, 0 Unchecked, 29.52ms Time], IncrementalHoareTripleChecker [23 Valid, 2497 Invalid, 0 Unknown, 0 Unchecked, 12165.33ms Time] [2021-11-12 23:21:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-11-12 23:21:19,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 2743. [2021-11-12 23:21:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2743 states, 1574 states have (on average 2.053367217280813) internal successors, (3232), 2727 states have internal predecessors, (3232), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:21:19,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2743 states to 2743 states and 3264 transitions. [2021-11-12 23:21:19,187 INFO L78 Accepts]: Start accepts. Automaton has 2743 states and 3264 transitions. Word has length 3 [2021-11-12 23:21:19,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:19,188 INFO L470 AbstractCegarLoop]: Abstraction has 2743 states and 3264 transitions. [2021-11-12 23:21:19,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2743 states and 3264 transitions. [2021-11-12 23:21:19,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:21:19,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:19,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:19,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:19,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:19,402 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:21:19,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:19,403 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2021-11-12 23:21:19,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:19,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470122567] [2021-11-12 23:21:19,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:19,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:19,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:19,407 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:19,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:21:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:19,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:21:19,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:19,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:21:19,721 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 23:21:19,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:19,752 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 23:21:19,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:19,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470122567] [2021-11-12 23:21:19,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470122567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:19,757 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:19,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:21:19,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009650532] [2021-11-12 23:21:19,758 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:19,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:21:19,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:19,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:21:19,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:21:19,759 INFO L87 Difference]: Start difference. First operand 2743 states and 3264 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:24,306 INFO L93 Difference]: Finished difference Result 3481 states and 4002 transitions. [2021-11-12 23:21:24,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:21:24,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 23:21:24,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:24,328 INFO L225 Difference]: With dead ends: 3481 [2021-11-12 23:21:24,328 INFO L226 Difference]: Without dead ends: 3481 [2021-11-12 23:21:24,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 23:21:24,330 INFO L933 BasicCegarLoop]: 2347 mSDtfsCounter, 1987 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3757.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1997 SdHoareTripleChecker+Valid, 3185 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.91ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4465.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:24,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1997 Valid, 3185 Invalid, 1679 Unknown, 0 Unchecked, 14.91ms Time], IncrementalHoareTripleChecker [102 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 4465.10ms Time] [2021-11-12 23:21:24,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2021-11-12 23:21:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 2652. [2021-11-12 23:21:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 1574 states have (on average 1.9739517153748412) internal successors, (3107), 2636 states have internal predecessors, (3107), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:21:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3139 transitions. [2021-11-12 23:21:24,419 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3139 transitions. Word has length 8 [2021-11-12 23:21:24,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:24,419 INFO L470 AbstractCegarLoop]: Abstraction has 2652 states and 3139 transitions. [2021-11-12 23:21:24,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:24,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3139 transitions. [2021-11-12 23:21:24,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:21:24,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:24,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:24,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:24,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:24,637 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:21:24,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:24,638 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2021-11-12 23:21:24,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:24,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705719384] [2021-11-12 23:21:24,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:24,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:24,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:24,640 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:24,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:21:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:24,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:21:24,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:24,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:21:24,924 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 23:21:24,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:25,006 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 23:21:25,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:25,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705719384] [2021-11-12 23:21:25,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705719384] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:25,007 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:25,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-12 23:21:25,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894672194] [2021-11-12 23:21:25,007 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:25,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:21:25,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:25,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:21:25,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:25,009 INFO L87 Difference]: Start difference. First operand 2652 states and 3139 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:36,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:36,762 INFO L93 Difference]: Finished difference Result 3607 states and 4030 transitions. [2021-11-12 23:21:36,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:21:36,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 23:21:36,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:36,781 INFO L225 Difference]: With dead ends: 3607 [2021-11-12 23:21:36,782 INFO L226 Difference]: Without dead ends: 3607 [2021-11-12 23:21:36,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 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 23:21:36,783 INFO L933 BasicCegarLoop]: 2677 mSDtfsCounter, 1441 mSDsluCounter, 2352 mSDsCounter, 0 mSdLazyCounter, 2776 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10333.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 5029 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.80ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11646.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:36,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1447 Valid, 5029 Invalid, 2803 Unknown, 0 Unchecked, 25.80ms Time], IncrementalHoareTripleChecker [27 Valid, 2776 Invalid, 0 Unknown, 0 Unchecked, 11646.08ms Time] [2021-11-12 23:21:36,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3607 states. [2021-11-12 23:21:36,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3607 to 2644. [2021-11-12 23:21:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 1576 states have (on average 1.958756345177665) internal successors, (3087), 2628 states have internal predecessors, (3087), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:21:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 3119 transitions. [2021-11-12 23:21:36,863 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 3119 transitions. Word has length 8 [2021-11-12 23:21:36,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:36,864 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 3119 transitions. [2021-11-12 23:21:36,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:36,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 3119 transitions. [2021-11-12 23:21:36,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 23:21:36,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:36,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:36,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:37,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:37,079 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:21:37,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:37,081 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2021-11-12 23:21:37,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:37,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560461194] [2021-11-12 23:21:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:37,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:37,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:37,083 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:37,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:21:37,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:37,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:21:37,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:37,352 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 23:21:37,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:37,381 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 23:21:37,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:37,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560461194] [2021-11-12 23:21:37,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560461194] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:37,382 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:37,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:21:37,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325661203] [2021-11-12 23:21:37,383 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:37,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:21:37,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:37,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:21:37,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:37,384 INFO L87 Difference]: Start difference. First operand 2644 states and 3119 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:37,473 INFO L93 Difference]: Finished difference Result 2602 states and 3076 transitions. [2021-11-12 23:21:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:21:37,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-12 23:21:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:37,492 INFO L225 Difference]: With dead ends: 2602 [2021-11-12 23:21:37,492 INFO L226 Difference]: Without dead ends: 2602 [2021-11-12 23:21:37,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 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 23:21:37,494 INFO L933 BasicCegarLoop]: 2396 mSDtfsCounter, 2384 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2388 SdHoareTripleChecker+Valid, 3606 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.77ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:37,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2388 Valid, 3606 Invalid, 17 Unknown, 0 Unchecked, 14.77ms Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 41.36ms Time] [2021-11-12 23:21:37,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-11-12 23:21:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2602. [2021-11-12 23:21:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 1558 states have (on average 1.9537869062901156) internal successors, (3044), 2586 states have internal predecessors, (3044), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:21:37,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 3076 transitions. [2021-11-12 23:21:37,561 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 3076 transitions. Word has length 11 [2021-11-12 23:21:37,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:37,562 INFO L470 AbstractCegarLoop]: Abstraction has 2602 states and 3076 transitions. [2021-11-12 23:21:37,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:37,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 3076 transitions. [2021-11-12 23:21:37,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 23:21:37,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:37,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:37,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:37,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:37,777 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:21:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:37,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2021-11-12 23:21:37,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:37,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168256172] [2021-11-12 23:21:37,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:37,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:37,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:37,779 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:37,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:21:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:38,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:21:38,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:38,058 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 23:21:38,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:38,099 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 23:21:38,103 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:38,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168256172] [2021-11-12 23:21:38,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168256172] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:38,104 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:38,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:21:38,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092386278] [2021-11-12 23:21:38,105 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:38,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:21:38,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:38,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:21:38,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:21:38,106 INFO L87 Difference]: Start difference. First operand 2602 states and 3076 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:38,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:38,243 INFO L93 Difference]: Finished difference Result 2581 states and 3048 transitions. [2021-11-12 23:21:38,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:21:38,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-12 23:21:38,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:38,259 INFO L225 Difference]: With dead ends: 2581 [2021-11-12 23:21:38,259 INFO L226 Difference]: Without dead ends: 2581 [2021-11-12 23:21:38,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 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 23:21:38,260 INFO L933 BasicCegarLoop]: 2351 mSDtfsCounter, 2316 mSDsluCounter, 3554 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2320 SdHoareTripleChecker+Valid, 5905 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.34ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:38,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2320 Valid, 5905 Invalid, 80 Unknown, 0 Unchecked, 14.34ms Time], IncrementalHoareTripleChecker [46 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 82.38ms Time] [2021-11-12 23:21:38,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2021-11-12 23:21:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 2580. [2021-11-12 23:21:38,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2580 states, 1550 states have (on average 1.9451612903225806) internal successors, (3015), 2564 states have internal predecessors, (3015), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:21:38,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2580 states to 2580 states and 3047 transitions. [2021-11-12 23:21:38,319 INFO L78 Accepts]: Start accepts. Automaton has 2580 states and 3047 transitions. Word has length 13 [2021-11-12 23:21:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:38,320 INFO L470 AbstractCegarLoop]: Abstraction has 2580 states and 3047 transitions. [2021-11-12 23:21:38,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:38,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2580 states and 3047 transitions. [2021-11-12 23:21:38,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-12 23:21:38,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:38,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:38,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:38,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:38,535 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:21:38,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:38,535 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2021-11-12 23:21:38,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:38,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871356337] [2021-11-12 23:21:38,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:38,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:38,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:38,539 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:38,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:21:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:38,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:21:38,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:38,806 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 23:21:38,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:38,840 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 23:21:38,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:38,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871356337] [2021-11-12 23:21:38,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871356337] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:38,841 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:38,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:21:38,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197070099] [2021-11-12 23:21:38,844 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:38,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:21:38,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:38,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:21:38,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:38,845 INFO L87 Difference]: Start difference. First operand 2580 states and 3047 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:38,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:38,921 INFO L93 Difference]: Finished difference Result 4234 states and 4857 transitions. [2021-11-12 23:21:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:21:38,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-12 23:21:38,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:38,945 INFO L225 Difference]: With dead ends: 4234 [2021-11-12 23:21:38,945 INFO L226 Difference]: Without dead ends: 4234 [2021-11-12 23:21:38,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 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 23:21:38,946 INFO L933 BasicCegarLoop]: 4082 mSDtfsCounter, 2277 mSDsluCounter, 3608 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2287 SdHoareTripleChecker+Valid, 7690 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.82ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:38,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2287 Valid, 7690 Invalid, 14 Unknown, 0 Unchecked, 10.82ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 23.63ms Time] [2021-11-12 23:21:38,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2021-11-12 23:21:39,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 2538. [2021-11-12 23:21:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2538 states, 1532 states have (on average 1.9399477806788512) internal successors, (2972), 2522 states have internal predecessors, (2972), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:21:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2538 states to 2538 states and 3004 transitions. [2021-11-12 23:21:39,014 INFO L78 Accepts]: Start accepts. Automaton has 2538 states and 3004 transitions. Word has length 20 [2021-11-12 23:21:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:39,014 INFO L470 AbstractCegarLoop]: Abstraction has 2538 states and 3004 transitions. [2021-11-12 23:21:39,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:39,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2538 states and 3004 transitions. [2021-11-12 23:21:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-12 23:21:39,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:39,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:39,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:39,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:39,234 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:21:39,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:39,234 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2021-11-12 23:21:39,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:39,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653644376] [2021-11-12 23:21:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:39,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:39,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:39,237 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:39,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:21:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:39,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:21:39,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:39,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:39,549 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 23:21:39,549 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:39,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653644376] [2021-11-12 23:21:39,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653644376] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:39,550 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:39,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:21:39,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458533997] [2021-11-12 23:21:39,551 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:39,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:21:39,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:39,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:21:39,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:39,553 INFO L87 Difference]: Start difference. First operand 2538 states and 3004 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:39,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:39,662 INFO L93 Difference]: Finished difference Result 4107 states and 4676 transitions. [2021-11-12 23:21:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:21:39,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-12 23:21:39,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:39,683 INFO L225 Difference]: With dead ends: 4107 [2021-11-12 23:21:39,684 INFO L226 Difference]: Without dead ends: 4107 [2021-11-12 23:21:39,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 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 23:21:39,685 INFO L933 BasicCegarLoop]: 3767 mSDtfsCounter, 4468 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4478 SdHoareTripleChecker+Valid, 5521 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.02ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:39,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4478 Valid, 5521 Invalid, 23 Unknown, 0 Unchecked, 9.02ms Time], IncrementalHoareTripleChecker [10 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 44.55ms Time] [2021-11-12 23:21:39,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2021-11-12 23:21:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 2460. [2021-11-12 23:21:39,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 1478 states have (on average 1.9235453315290933) internal successors, (2843), 2444 states have internal predecessors, (2843), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:21:39,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 2875 transitions. [2021-11-12 23:21:39,749 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 2875 transitions. Word has length 20 [2021-11-12 23:21:39,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:39,749 INFO L470 AbstractCegarLoop]: Abstraction has 2460 states and 2875 transitions. [2021-11-12 23:21:39,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:39,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 2875 transitions. [2021-11-12 23:21:39,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 23:21:39,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:39,751 INFO L514 BasicCegarLoop]: trace histogram [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 23:21:39,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:39,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:39,966 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:21:39,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:39,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2021-11-12 23:21:39,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:39,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286793745] [2021-11-12 23:21:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:39,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:39,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:39,968 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:39,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:21:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:40,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:21:40,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:40,254 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 23:21:40,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:40,305 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 23:21:40,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:40,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286793745] [2021-11-12 23:21:40,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286793745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:40,306 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:40,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:21:40,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344093183] [2021-11-12 23:21:40,306 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:40,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:21:40,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:40,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:21:40,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:21:40,307 INFO L87 Difference]: Start difference. First operand 2460 states and 2875 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:40,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:40,442 INFO L93 Difference]: Finished difference Result 4093 states and 4657 transitions. [2021-11-12 23:21:40,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:21:40,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 23:21:40,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:40,457 INFO L225 Difference]: With dead ends: 4093 [2021-11-12 23:21:40,458 INFO L226 Difference]: Without dead ends: 4093 [2021-11-12 23:21:40,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 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 23:21:40,459 INFO L933 BasicCegarLoop]: 3728 mSDtfsCounter, 4400 mSDsluCounter, 5482 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4410 SdHoareTripleChecker+Valid, 9210 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.36ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:40,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4410 Valid, 9210 Invalid, 86 Unknown, 0 Unchecked, 12.36ms Time], IncrementalHoareTripleChecker [52 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 74.62ms Time] [2021-11-12 23:21:40,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4093 states. [2021-11-12 23:21:40,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4093 to 2438. [2021-11-12 23:21:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2438 states, 1470 states have (on average 1.9142857142857144) internal successors, (2814), 2422 states have internal predecessors, (2814), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:21:40,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2846 transitions. [2021-11-12 23:21:40,538 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2846 transitions. Word has length 22 [2021-11-12 23:21:40,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:40,539 INFO L470 AbstractCegarLoop]: Abstraction has 2438 states and 2846 transitions. [2021-11-12 23:21:40,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:40,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2846 transitions. [2021-11-12 23:21:40,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 23:21:40,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:40,540 INFO L514 BasicCegarLoop]: trace histogram [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 23:21:40,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:40,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:40,754 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:21:40,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:40,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2021-11-12 23:21:40,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:40,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109514341] [2021-11-12 23:21:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:40,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:40,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:40,757 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:40,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:21:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:41,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:21:41,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:41,099 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 23:21:41,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:41,154 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 23:21:41,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:41,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109514341] [2021-11-12 23:21:41,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109514341] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:41,155 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:41,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:21:41,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894711414] [2021-11-12 23:21:41,155 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:41,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:21:41,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:41,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:21:41,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:21:41,157 INFO L87 Difference]: Start difference. First operand 2438 states and 2846 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:41,303 INFO L93 Difference]: Finished difference Result 4028 states and 4534 transitions. [2021-11-12 23:21:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:21:41,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 23:21:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:41,315 INFO L225 Difference]: With dead ends: 4028 [2021-11-12 23:21:41,316 INFO L226 Difference]: Without dead ends: 4028 [2021-11-12 23:21:41,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 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 23:21:41,317 INFO L933 BasicCegarLoop]: 3874 mSDtfsCounter, 2170 mSDsluCounter, 7305 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2180 SdHoareTripleChecker+Valid, 11179 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.11ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:41,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2180 Valid, 11179 Invalid, 67 Unknown, 0 Unchecked, 15.11ms Time], IncrementalHoareTripleChecker [32 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 70.68ms Time] [2021-11-12 23:21:41,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4028 states. [2021-11-12 23:21:41,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4028 to 2400. [2021-11-12 23:21:41,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 1446 states have (on average 1.8858921161825726) internal successors, (2727), 2384 states have internal predecessors, (2727), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:21:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 2759 transitions. [2021-11-12 23:21:41,379 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 2759 transitions. Word has length 22 [2021-11-12 23:21:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:41,379 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 2759 transitions. [2021-11-12 23:21:41,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 2759 transitions. [2021-11-12 23:21:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-12 23:21:41,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:41,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:41,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:41,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:41,600 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:21:41,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2021-11-12 23:21:41,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:41,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761517732] [2021-11-12 23:21:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:41,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:41,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:41,603 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:41,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:21:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:41,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:21:41,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:41,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:21:41,994 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 23:21:41,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:42,119 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 23:21:42,120 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:42,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761517732] [2021-11-12 23:21:42,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761517732] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:42,120 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:42,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:21:42,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691109799] [2021-11-12 23:21:42,121 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:42,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:21:42,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:42,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:21:42,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:42,123 INFO L87 Difference]: Start difference. First operand 2400 states and 2759 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:46,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:46,916 INFO L93 Difference]: Finished difference Result 3021 states and 3299 transitions. [2021-11-12 23:21:46,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:21:46,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-12 23:21:46,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:46,924 INFO L225 Difference]: With dead ends: 3021 [2021-11-12 23:21:46,924 INFO L226 Difference]: Without dead ends: 3021 [2021-11-12 23:21:46,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:21:46,926 INFO L933 BasicCegarLoop]: 1514 mSDtfsCounter, 3081 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 2065 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4015.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3087 SdHoareTripleChecker+Valid, 2791 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.88ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4717.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:46,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3087 Valid, 2791 Invalid, 2086 Unknown, 0 Unchecked, 15.88ms Time], IncrementalHoareTripleChecker [21 Valid, 2065 Invalid, 0 Unknown, 0 Unchecked, 4717.88ms Time] [2021-11-12 23:21:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3021 states. [2021-11-12 23:21:46,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3021 to 2396. [2021-11-12 23:21:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 1446 states have (on average 1.8831258644536653) internal successors, (2723), 2380 states have internal predecessors, (2723), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:21:46,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 2755 transitions. [2021-11-12 23:21:46,973 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 2755 transitions. Word has length 27 [2021-11-12 23:21:46,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:46,973 INFO L470 AbstractCegarLoop]: Abstraction has 2396 states and 2755 transitions. [2021-11-12 23:21:46,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:46,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 2755 transitions. [2021-11-12 23:21:46,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-12 23:21:46,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:46,975 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:46,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:47,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:47,188 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:21:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:47,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2021-11-12 23:21:47,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:47,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763163630] [2021-11-12 23:21:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:47,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:47,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:47,191 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:47,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:21:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:47,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:21:47,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:47,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:21:47,733 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 23:21:47,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:48,196 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 23:21:48,197 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:48,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763163630] [2021-11-12 23:21:48,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763163630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:48,197 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:48,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 23:21:48,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940196459] [2021-11-12 23:21:48,198 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:48,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:21:48,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:48,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:21:48,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:21:48,199 INFO L87 Difference]: Start difference. First operand 2396 states and 2755 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:02,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:02,638 INFO L93 Difference]: Finished difference Result 3571 states and 3924 transitions. [2021-11-12 23:22:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:22:02,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-12 23:22:02,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:02,649 INFO L225 Difference]: With dead ends: 3571 [2021-11-12 23:22:02,649 INFO L226 Difference]: Without dead ends: 3571 [2021-11-12 23:22:02,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:22:02,650 INFO L933 BasicCegarLoop]: 1575 mSDtfsCounter, 6054 mSDsluCounter, 2766 mSDsCounter, 0 mSdLazyCounter, 3237 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12499.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6054 SdHoareTripleChecker+Valid, 4341 SdHoareTripleChecker+Invalid, 3266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.09ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14245.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:02,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6054 Valid, 4341 Invalid, 3266 Unknown, 0 Unchecked, 30.09ms Time], IncrementalHoareTripleChecker [29 Valid, 3237 Invalid, 0 Unknown, 0 Unchecked, 14245.90ms Time] [2021-11-12 23:22:02,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3571 states. [2021-11-12 23:22:02,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3571 to 2429. [2021-11-12 23:22:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 1480 states have (on average 1.864864864864865) internal successors, (2760), 2413 states have internal predecessors, (2760), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:22:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 2792 transitions. [2021-11-12 23:22:02,698 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 2792 transitions. Word has length 27 [2021-11-12 23:22:02,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:02,699 INFO L470 AbstractCegarLoop]: Abstraction has 2429 states and 2792 transitions. [2021-11-12 23:22:02,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:02,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 2792 transitions. [2021-11-12 23:22:02,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-12 23:22:02,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:02,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:02,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:02,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:22:02,914 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:22:02,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:02,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2021-11-12 23:22:02,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:02,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750062135] [2021-11-12 23:22:02,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:02,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:02,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:02,917 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:02,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:22:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:03,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:22:03,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:03,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:22:03,352 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 23:22:03,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:03,481 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 23:22:03,481 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:03,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750062135] [2021-11-12 23:22:03,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750062135] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:03,482 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:03,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:22:03,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547365953] [2021-11-12 23:22:03,482 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:03,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:22:03,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:03,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:22:03,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:22:03,484 INFO L87 Difference]: Start difference. First operand 2429 states and 2792 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:10,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:10,245 INFO L93 Difference]: Finished difference Result 4682 states and 5248 transitions. [2021-11-12 23:22:10,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:22:10,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-12 23:22:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:10,256 INFO L225 Difference]: With dead ends: 4682 [2021-11-12 23:22:10,257 INFO L226 Difference]: Without dead ends: 4682 [2021-11-12 23:22:10,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:22:10,258 INFO L933 BasicCegarLoop]: 2684 mSDtfsCounter, 4263 mSDsluCounter, 2372 mSDsCounter, 0 mSdLazyCounter, 3162 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5651.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4270 SdHoareTripleChecker+Valid, 5056 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.26ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6651.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:10,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4270 Valid, 5056 Invalid, 3205 Unknown, 0 Unchecked, 23.26ms Time], IncrementalHoareTripleChecker [43 Valid, 3162 Invalid, 0 Unknown, 0 Unchecked, 6651.76ms Time] [2021-11-12 23:22:10,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4682 states. [2021-11-12 23:22:10,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4682 to 2425. [2021-11-12 23:22:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 1480 states have (on average 1.8621621621621622) internal successors, (2756), 2409 states have internal predecessors, (2756), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:22:10,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 2788 transitions. [2021-11-12 23:22:10,306 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 2788 transitions. Word has length 36 [2021-11-12 23:22:10,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:10,307 INFO L470 AbstractCegarLoop]: Abstraction has 2425 states and 2788 transitions. [2021-11-12 23:22:10,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:10,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 2788 transitions. [2021-11-12 23:22:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-12 23:22:10,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:10,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:10,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-12 23:22:10,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:22:10,523 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:22:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:10,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2021-11-12 23:22:10,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:10,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830712305] [2021-11-12 23:22:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:10,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:10,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:10,527 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:10,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:22:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:10,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:22:10,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:10,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:22:11,085 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 23:22:11,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:11,646 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 23:22:11,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:11,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830712305] [2021-11-12 23:22:11,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830712305] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:11,647 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:11,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 23:22:11,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924711976] [2021-11-12 23:22:11,648 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:11,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:22:11,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:11,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:22:11,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:22:11,649 INFO L87 Difference]: Start difference. First operand 2425 states and 2788 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:31,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:31,126 INFO L93 Difference]: Finished difference Result 4594 states and 5036 transitions. [2021-11-12 23:22:31,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:22:31,127 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-12 23:22:31,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:31,138 INFO L225 Difference]: With dead ends: 4594 [2021-11-12 23:22:31,138 INFO L226 Difference]: Without dead ends: 4594 [2021-11-12 23:22:31,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:22:31,140 INFO L933 BasicCegarLoop]: 3274 mSDtfsCounter, 4252 mSDsluCounter, 4202 mSDsCounter, 0 mSdLazyCounter, 4879 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17034.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4257 SdHoareTripleChecker+Valid, 7476 SdHoareTripleChecker+Invalid, 4908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.20ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 4879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19239.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:31,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4257 Valid, 7476 Invalid, 4908 Unknown, 0 Unchecked, 38.20ms Time], IncrementalHoareTripleChecker [29 Valid, 4879 Invalid, 0 Unknown, 0 Unchecked, 19239.53ms Time] [2021-11-12 23:22:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4594 states. [2021-11-12 23:22:31,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4594 to 2421. [2021-11-12 23:22:31,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 1480 states have (on average 1.8594594594594596) internal successors, (2752), 2405 states have internal predecessors, (2752), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:22:31,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 2784 transitions. [2021-11-12 23:22:31,188 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 2784 transitions. Word has length 36 [2021-11-12 23:22:31,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:31,189 INFO L470 AbstractCegarLoop]: Abstraction has 2421 states and 2784 transitions. [2021-11-12 23:22:31,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:31,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 2784 transitions. [2021-11-12 23:22:31,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-12 23:22:31,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:31,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:31,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:31,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:22:31,404 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:22:31,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:31,405 INFO L85 PathProgramCache]: Analyzing trace with hash -526454297, now seen corresponding path program 1 times [2021-11-12 23:22:31,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:31,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146654869] [2021-11-12 23:22:31,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:31,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:31,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:31,407 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:31,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:22:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:31,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:22:31,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:31,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:22:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:31,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:31,942 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 23:22:31,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:31,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146654869] [2021-11-12 23:22:31,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146654869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:31,942 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:31,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:22:31,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403692093] [2021-11-12 23:22:31,942 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:31,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:22:31,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:31,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:22:31,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:22:31,948 INFO L87 Difference]: Start difference. First operand 2421 states and 2784 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:39,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:39,473 INFO L93 Difference]: Finished difference Result 5038 states and 5620 transitions. [2021-11-12 23:22:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:22:39,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-12 23:22:39,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:39,479 INFO L225 Difference]: With dead ends: 5038 [2021-11-12 23:22:39,479 INFO L226 Difference]: Without dead ends: 5038 [2021-11-12 23:22:39,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:22:39,480 INFO L933 BasicCegarLoop]: 2521 mSDtfsCounter, 4829 mSDsluCounter, 2561 mSDsCounter, 0 mSdLazyCounter, 3342 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6317.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4839 SdHoareTripleChecker+Valid, 5082 SdHoareTripleChecker+Invalid, 3393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.68ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7414.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:39,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4839 Valid, 5082 Invalid, 3393 Unknown, 0 Unchecked, 23.68ms Time], IncrementalHoareTripleChecker [51 Valid, 3342 Invalid, 0 Unknown, 0 Unchecked, 7414.34ms Time] [2021-11-12 23:22:39,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5038 states. [2021-11-12 23:22:39,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5038 to 2418. [2021-11-12 23:22:39,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 1480 states have (on average 1.852027027027027) internal successors, (2741), 2402 states have internal predecessors, (2741), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:22:39,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 2773 transitions. [2021-11-12 23:22:39,566 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 2773 transitions. Word has length 36 [2021-11-12 23:22:39,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:39,566 INFO L470 AbstractCegarLoop]: Abstraction has 2418 states and 2773 transitions. [2021-11-12 23:22:39,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 2773 transitions. [2021-11-12 23:22:39,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-12 23:22:39,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:39,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:39,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:39,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:22:39,781 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:22:39,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:39,781 INFO L85 PathProgramCache]: Analyzing trace with hash -526454296, now seen corresponding path program 1 times [2021-11-12 23:22:39,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:39,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877452539] [2021-11-12 23:22:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:39,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:39,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:39,783 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:39,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:22:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:39,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:22:39,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:40,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:22:40,288 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 23:22:40,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:40,780 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 23:22:40,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:40,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877452539] [2021-11-12 23:22:40,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877452539] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:40,780 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:40,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 23:22:40,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584963507] [2021-11-12 23:22:40,780 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:40,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:22:40,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:40,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:22:40,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:22:40,782 INFO L87 Difference]: Start difference. First operand 2418 states and 2773 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:05,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:05,741 INFO L93 Difference]: Finished difference Result 5170 states and 5700 transitions. [2021-11-12 23:23:05,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:23:05,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-12 23:23:05,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:05,747 INFO L225 Difference]: With dead ends: 5170 [2021-11-12 23:23:05,747 INFO L226 Difference]: Without dead ends: 5170 [2021-11-12 23:23:05,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:23:05,748 INFO L933 BasicCegarLoop]: 2791 mSDtfsCounter, 5159 mSDsluCounter, 4960 mSDsCounter, 0 mSdLazyCounter, 5140 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22122.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5164 SdHoareTripleChecker+Valid, 7751 SdHoareTripleChecker+Invalid, 5169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.75ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 5140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24719.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:05,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5164 Valid, 7751 Invalid, 5169 Unknown, 0 Unchecked, 39.75ms Time], IncrementalHoareTripleChecker [29 Valid, 5140 Invalid, 0 Unknown, 0 Unchecked, 24719.28ms Time] [2021-11-12 23:23:05,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5170 states. [2021-11-12 23:23:05,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5170 to 2418. [2021-11-12 23:23:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 1480 states have (on average 1.8493243243243243) internal successors, (2737), 2402 states have internal predecessors, (2737), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:23:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 2769 transitions. [2021-11-12 23:23:05,799 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 2769 transitions. Word has length 36 [2021-11-12 23:23:05,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:05,799 INFO L470 AbstractCegarLoop]: Abstraction has 2418 states and 2769 transitions. [2021-11-12 23:23:05,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 2769 transitions. [2021-11-12 23:23:05,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-12 23:23:05,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:05,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:05,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:06,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:06,016 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:23:06,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:06,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1782356879, now seen corresponding path program 1 times [2021-11-12 23:23:06,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:06,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982297775] [2021-11-12 23:23:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:06,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:06,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:06,019 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:06,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:23:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:06,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:23:06,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:06,396 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 23:23:06,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:06,511 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 23:23:06,512 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:06,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982297775] [2021-11-12 23:23:06,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982297775] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:06,512 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:06,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 23:23:06,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939144781] [2021-11-12 23:23:06,513 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:06,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:23:06,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:06,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:23:06,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:23:06,514 INFO L87 Difference]: Start difference. First operand 2418 states and 2769 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:06,579 INFO L93 Difference]: Finished difference Result 2412 states and 2755 transitions. [2021-11-12 23:23:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:23:06,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-12 23:23:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:06,582 INFO L225 Difference]: With dead ends: 2412 [2021-11-12 23:23:06,582 INFO L226 Difference]: Without dead ends: 2412 [2021-11-12 23:23:06,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:23:06,583 INFO L933 BasicCegarLoop]: 2181 mSDtfsCounter, 1145 mSDsluCounter, 3204 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 5385 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.73ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:06,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 5385 Invalid, 43 Unknown, 0 Unchecked, 4.73ms Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 39.44ms Time] [2021-11-12 23:23:06,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-11-12 23:23:06,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 2412. [2021-11-12 23:23:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 1474 states have (on average 1.8473541383989145) internal successors, (2723), 2396 states have internal predecessors, (2723), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:23:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 2755 transitions. [2021-11-12 23:23:06,619 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 2755 transitions. Word has length 40 [2021-11-12 23:23:06,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:06,619 INFO L470 AbstractCegarLoop]: Abstraction has 2412 states and 2755 transitions. [2021-11-12 23:23:06,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:06,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 2755 transitions. [2021-11-12 23:23:06,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-12 23:23:06,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:06,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:06,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-12 23:23:06,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:06,834 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:23:06,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:06,835 INFO L85 PathProgramCache]: Analyzing trace with hash -263031357, now seen corresponding path program 1 times [2021-11-12 23:23:06,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:06,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614259986] [2021-11-12 23:23:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:06,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:06,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:06,837 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:06,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:23:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:07,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:23:07,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:07,382 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 23:23:07,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:07,732 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 23:23:07,733 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:07,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614259986] [2021-11-12 23:23:07,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614259986] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:07,733 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:07,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:23:07,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239749359] [2021-11-12 23:23:07,734 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:07,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:23:07,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:07,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:23:07,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:23:07,735 INFO L87 Difference]: Start difference. First operand 2412 states and 2755 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:08,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:08,071 INFO L93 Difference]: Finished difference Result 3930 states and 4407 transitions. [2021-11-12 23:23:08,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:23:08,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-12 23:23:08,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:08,075 INFO L225 Difference]: With dead ends: 3930 [2021-11-12 23:23:08,075 INFO L226 Difference]: Without dead ends: 3930 [2021-11-12 23:23:08,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 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 23:23:08,076 INFO L933 BasicCegarLoop]: 2269 mSDtfsCounter, 1564 mSDsluCounter, 2027 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 259.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1573 SdHoareTripleChecker+Valid, 4296 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.96ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 308.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:08,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1573 Valid, 4296 Invalid, 140 Unknown, 0 Unchecked, 4.96ms Time], IncrementalHoareTripleChecker [9 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 308.58ms Time] [2021-11-12 23:23:08,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2021-11-12 23:23:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3131. [2021-11-12 23:23:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 2189 states have (on average 1.814070351758794) internal successors, (3971), 3108 states have internal predecessors, (3971), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-12 23:23:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4017 transitions. [2021-11-12 23:23:08,155 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4017 transitions. Word has length 48 [2021-11-12 23:23:08,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:08,155 INFO L470 AbstractCegarLoop]: Abstraction has 3131 states and 4017 transitions. [2021-11-12 23:23:08,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:08,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4017 transitions. [2021-11-12 23:23:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-12 23:23:08,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:08,157 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:08,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:08,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:08,370 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:23:08,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:08,371 INFO L85 PathProgramCache]: Analyzing trace with hash -435335443, now seen corresponding path program 1 times [2021-11-12 23:23:08,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:08,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687624986] [2021-11-12 23:23:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:08,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:08,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:08,374 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:08,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:23:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:08,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:23:08,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:08,773 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 23:23:08,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:08,896 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 23:23:08,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:08,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687624986] [2021-11-12 23:23:08,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687624986] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:08,897 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:08,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 23:23:08,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120254199] [2021-11-12 23:23:08,897 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:08,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:23:08,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:08,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:23:08,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:23:08,899 INFO L87 Difference]: Start difference. First operand 3131 states and 4017 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:08,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:08,997 INFO L93 Difference]: Finished difference Result 4459 states and 5419 transitions. [2021-11-12 23:23:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:23:08,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-12 23:23:08,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:09,005 INFO L225 Difference]: With dead ends: 4459 [2021-11-12 23:23:09,005 INFO L226 Difference]: Without dead ends: 4459 [2021-11-12 23:23:09,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:23:09,007 INFO L933 BasicCegarLoop]: 3642 mSDtfsCounter, 2139 mSDsluCounter, 5125 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2149 SdHoareTripleChecker+Valid, 8767 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.85ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:09,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2149 Valid, 8767 Invalid, 43 Unknown, 0 Unchecked, 10.85ms Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 36.73ms Time] [2021-11-12 23:23:09,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4459 states. [2021-11-12 23:23:09,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4459 to 3107. [2021-11-12 23:23:09,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3107 states, 2165 states have (on average 1.8157043879907622) internal successors, (3931), 3084 states have internal predecessors, (3931), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-12 23:23:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3107 states to 3107 states and 3977 transitions. [2021-11-12 23:23:09,101 INFO L78 Accepts]: Start accepts. Automaton has 3107 states and 3977 transitions. Word has length 51 [2021-11-12 23:23:09,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:09,102 INFO L470 AbstractCegarLoop]: Abstraction has 3107 states and 3977 transitions. [2021-11-12 23:23:09,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:09,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3107 states and 3977 transitions. [2021-11-12 23:23:09,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-12 23:23:09,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:09,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:23:09,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-12 23:23:09,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:09,321 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:23:09,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:09,322 INFO L85 PathProgramCache]: Analyzing trace with hash -273786554, now seen corresponding path program 1 times [2021-11-12 23:23:09,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:09,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149227455] [2021-11-12 23:23:09,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:09,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:09,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:09,324 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:09,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:23:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:09,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:23:09,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:09,722 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 23:23:09,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:09,848 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 23:23:09,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:09,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149227455] [2021-11-12 23:23:09,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149227455] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:09,849 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:09,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 23:23:09,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310202956] [2021-11-12 23:23:09,849 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:09,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:23:09,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:09,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:23:09,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:23:09,851 INFO L87 Difference]: Start difference. First operand 3107 states and 3977 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:10,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:10,020 INFO L93 Difference]: Finished difference Result 4204 states and 4917 transitions. [2021-11-12 23:23:10,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:23:10,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-12 23:23:10,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:10,026 INFO L225 Difference]: With dead ends: 4204 [2021-11-12 23:23:10,026 INFO L226 Difference]: Without dead ends: 4204 [2021-11-12 23:23:10,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:23:10,028 INFO L933 BasicCegarLoop]: 3683 mSDtfsCounter, 2130 mSDsluCounter, 5216 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2140 SdHoareTripleChecker+Valid, 8899 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.73ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:10,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2140 Valid, 8899 Invalid, 43 Unknown, 0 Unchecked, 24.73ms Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 37.91ms Time] [2021-11-12 23:23:10,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4204 states. [2021-11-12 23:23:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 3095. [2021-11-12 23:23:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3095 states, 2153 states have (on average 1.8165350673478866) internal successors, (3911), 3072 states have internal predecessors, (3911), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-12 23:23:10,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3095 states to 3095 states and 3957 transitions. [2021-11-12 23:23:10,116 INFO L78 Accepts]: Start accepts. Automaton has 3095 states and 3957 transitions. Word has length 54 [2021-11-12 23:23:10,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:10,117 INFO L470 AbstractCegarLoop]: Abstraction has 3095 states and 3957 transitions. [2021-11-12 23:23:10,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3095 states and 3957 transitions. [2021-11-12 23:23:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:23:10,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:10,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:23:10,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:10,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:10,319 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:23:10,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:10,319 INFO L85 PathProgramCache]: Analyzing trace with hash -345082942, now seen corresponding path program 1 times [2021-11-12 23:23:10,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:10,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261923079] [2021-11-12 23:23:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:10,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:10,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:10,322 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:10,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:23:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:10,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:23:10,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:10,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:23:10,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:23:10,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:23:10,735 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-12 23:23:10,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-12 23:23:10,787 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-12 23:23:10,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-12 23:23:10,904 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 23:23:10,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:11,043 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 23:23:11,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:11,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261923079] [2021-11-12 23:23:11,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261923079] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:11,043 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:11,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:23:11,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897601457] [2021-11-12 23:23:11,044 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:11,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:23:11,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:11,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:23:11,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:23:11,045 INFO L87 Difference]: Start difference. First operand 3095 states and 3957 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:14,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:14,530 INFO L93 Difference]: Finished difference Result 3323 states and 4196 transitions. [2021-11-12 23:23:14,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:23:14,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-12 23:23:14,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:14,534 INFO L225 Difference]: With dead ends: 3323 [2021-11-12 23:23:14,534 INFO L226 Difference]: Without dead ends: 3323 [2021-11-12 23:23:14,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:23:14,534 INFO L933 BasicCegarLoop]: 2062 mSDtfsCounter, 1027 mSDsluCounter, 5179 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2989.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 7241 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.08ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3420.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:14,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1031 Valid, 7241 Invalid, 750 Unknown, 0 Unchecked, 12.08ms Time], IncrementalHoareTripleChecker [3 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 3420.19ms Time] [2021-11-12 23:23:14,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2021-11-12 23:23:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 3061. [2021-11-12 23:23:14,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 2119 states have (on average 1.8291647003303444) internal successors, (3876), 3038 states have internal predecessors, (3876), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-12 23:23:14,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 3922 transitions. [2021-11-12 23:23:14,564 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 3922 transitions. Word has length 57 [2021-11-12 23:23:14,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:14,564 INFO L470 AbstractCegarLoop]: Abstraction has 3061 states and 3922 transitions. [2021-11-12 23:23:14,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:14,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 3922 transitions. [2021-11-12 23:23:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 23:23:14,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:14,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:23:14,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:14,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:14,780 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:23:14,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:14,780 INFO L85 PathProgramCache]: Analyzing trace with hash 122106401, now seen corresponding path program 1 times [2021-11-12 23:23:14,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:14,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215994586] [2021-11-12 23:23:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:14,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:14,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:14,783 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:14,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:23:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:15,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:23:15,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:15,585 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 23:23:15,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:16,010 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 23:23:16,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:16,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215994586] [2021-11-12 23:23:16,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215994586] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:16,010 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:16,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:23:16,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251408221] [2021-11-12 23:23:16,011 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:16,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:23:16,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:16,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:23:16,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:23:16,012 INFO L87 Difference]: Start difference. First operand 3061 states and 3922 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:16,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:16,179 INFO L93 Difference]: Finished difference Result 4503 states and 5557 transitions. [2021-11-12 23:23:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:23:16,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-12 23:23:16,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:16,189 INFO L225 Difference]: With dead ends: 4503 [2021-11-12 23:23:16,190 INFO L226 Difference]: Without dead ends: 4503 [2021-11-12 23:23:16,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 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 23:23:16,191 INFO L933 BasicCegarLoop]: 2803 mSDtfsCounter, 1262 mSDsluCounter, 2057 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1270 SdHoareTripleChecker+Valid, 4860 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.06ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:16,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1270 Valid, 4860 Invalid, 64 Unknown, 0 Unchecked, 5.06ms Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 140.25ms Time] [2021-11-12 23:23:16,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4503 states. [2021-11-12 23:23:16,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4503 to 3784. [2021-11-12 23:23:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 2838 states have (on average 1.7924594785059902) internal successors, (5087), 3754 states have internal predecessors, (5087), 30 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-12 23:23:16,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5147 transitions. [2021-11-12 23:23:16,296 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5147 transitions. Word has length 59 [2021-11-12 23:23:16,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:16,296 INFO L470 AbstractCegarLoop]: Abstraction has 3784 states and 5147 transitions. [2021-11-12 23:23:16,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:16,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5147 transitions. [2021-11-12 23:23:16,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 23:23:16,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:16,298 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:23:16,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:16,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:16,512 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:23:16,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:16,512 INFO L85 PathProgramCache]: Analyzing trace with hash -45497454, now seen corresponding path program 1 times [2021-11-12 23:23:16,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:16,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783405390] [2021-11-12 23:23:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:16,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:16,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:16,514 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:16,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:23:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:16,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:23:16,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:16,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:23:16,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:23:17,723 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-12 23:23:17,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-12 23:23:17,731 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-12 23:23:17,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-12 23:23:17,766 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 23:23:17,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:23:22,827 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:22,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783405390] [2021-11-12 23:23:22,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783405390] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:22,828 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:22,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 23:23:22,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215004355] [2021-11-12 23:23:22,828 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:22,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:23:22,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:22,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:23:22,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-12 23:23:22,830 INFO L87 Difference]: Start difference. First operand 3784 states and 5147 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:33,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:33,191 INFO L93 Difference]: Finished difference Result 5542 states and 7453 transitions. [2021-11-12 23:23:33,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:23:33,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-12 23:23:33,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:33,202 INFO L225 Difference]: With dead ends: 5542 [2021-11-12 23:23:33,203 INFO L226 Difference]: Without dead ends: 5542 [2021-11-12 23:23:33,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-12 23:23:33,206 INFO L933 BasicCegarLoop]: 2391 mSDtfsCounter, 2433 mSDsluCounter, 2725 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8898.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2441 SdHoareTripleChecker+Valid, 5116 SdHoareTripleChecker+Invalid, 4471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.82ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2792 IncrementalHoareTripleChecker+Unchecked, 10236.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:33,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2441 Valid, 5116 Invalid, 4471 Unknown, 0 Unchecked, 26.82ms Time], IncrementalHoareTripleChecker [41 Valid, 1638 Invalid, 0 Unknown, 2792 Unchecked, 10236.25ms Time] [2021-11-12 23:23:33,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5542 states. [2021-11-12 23:23:33,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5542 to 3754. [2021-11-12 23:23:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3754 states, 2840 states have (on average 1.7693661971830985) internal successors, (5025), 3724 states have internal predecessors, (5025), 30 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-12 23:23:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3754 states to 3754 states and 5085 transitions. [2021-11-12 23:23:33,307 INFO L78 Accepts]: Start accepts. Automaton has 3754 states and 5085 transitions. Word has length 62 [2021-11-12 23:23:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:33,307 INFO L470 AbstractCegarLoop]: Abstraction has 3754 states and 5085 transitions. [2021-11-12 23:23:33,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:33,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3754 states and 5085 transitions. [2021-11-12 23:23:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 23:23:33,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:33,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:23:33,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:33,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:33,525 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr391REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:23:33,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash -272070766, now seen corresponding path program 1 times [2021-11-12 23:23:33,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:33,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644048840] [2021-11-12 23:23:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:33,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:33,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:33,528 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:33,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:23:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:34,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:23:34,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:34,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:23:34,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:23:34,851 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-12 23:23:34,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2021-11-12 23:23:34,868 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-12 23:23:34,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2021-11-12 23:23:34,933 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 23:23:34,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:39,807 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 23:23:39,808 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:39,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644048840] [2021-11-12 23:23:39,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644048840] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:39,808 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:39,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 23:23:39,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280374037] [2021-11-12 23:23:39,808 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:39,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:23:39,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:39,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:23:39,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-12 23:23:39,810 INFO L87 Difference]: Start difference. First operand 3754 states and 5085 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:46,930 INFO L93 Difference]: Finished difference Result 3808 states and 5065 transitions. [2021-11-12 23:23:46,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:23:46,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-12 23:23:46,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:46,938 INFO L225 Difference]: With dead ends: 3808 [2021-11-12 23:23:46,939 INFO L226 Difference]: Without dead ends: 3808 [2021-11-12 23:23:46,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-12 23:23:46,940 INFO L933 BasicCegarLoop]: 1614 mSDtfsCounter, 1407 mSDsluCounter, 1968 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6094.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.18ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1531 IncrementalHoareTripleChecker+Unchecked, 7045.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:46,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1414 Valid, 3582 Invalid, 2620 Unknown, 0 Unchecked, 17.18ms Time], IncrementalHoareTripleChecker [37 Valid, 1052 Invalid, 0 Unknown, 1531 Unchecked, 7045.32ms Time] [2021-11-12 23:23:46,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3808 states. [2021-11-12 23:23:46,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3808 to 3770. [2021-11-12 23:23:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3770 states, 2887 states have (on average 1.7322480083131278) internal successors, (5001), 3740 states have internal predecessors, (5001), 30 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-12 23:23:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3770 states to 3770 states and 5061 transitions. [2021-11-12 23:23:46,999 INFO L78 Accepts]: Start accepts. Automaton has 3770 states and 5061 transitions. Word has length 62 [2021-11-12 23:23:46,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:46,999 INFO L470 AbstractCegarLoop]: Abstraction has 3770 states and 5061 transitions. [2021-11-12 23:23:46,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:47,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3770 states and 5061 transitions. [2021-11-12 23:23:47,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-12 23:23:47,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:47,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:23:47,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:47,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:47,217 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr75REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:23:47,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:47,219 INFO L85 PathProgramCache]: Analyzing trace with hash -773371597, now seen corresponding path program 1 times [2021-11-12 23:23:47,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:47,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914485470] [2021-11-12 23:23:47,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:47,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:47,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:47,222 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:47,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:23:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:47,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:23:47,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:47,707 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 23:23:47,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:47,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-12 23:23:48,106 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 23:23:48,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:48,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914485470] [2021-11-12 23:23:48,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914485470] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:48,106 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:48,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 23:23:48,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837605463] [2021-11-12 23:23:48,107 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:48,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:23:48,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:48,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:23:48,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:23:48,108 INFO L87 Difference]: Start difference. First operand 3770 states and 5061 transitions. Second operand has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:51,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:51,721 INFO L93 Difference]: Finished difference Result 3768 states and 5057 transitions. [2021-11-12 23:23:51,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:23:51,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-12 23:23:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:51,728 INFO L225 Difference]: With dead ends: 3768 [2021-11-12 23:23:51,728 INFO L226 Difference]: Without dead ends: 3768 [2021-11-12 23:23:51,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:23:51,729 INFO L933 BasicCegarLoop]: 1362 mSDtfsCounter, 6498 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3050.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6508 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.89ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3555.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:51,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6508 Valid, 1801 Invalid, 863 Unknown, 0 Unchecked, 13.89ms Time], IncrementalHoareTripleChecker [67 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 3555.67ms Time] [2021-11-12 23:23:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2021-11-12 23:23:51,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3768. [2021-11-12 23:23:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3768 states, 2887 states have (on average 1.7308624870107379) internal successors, (4997), 3738 states have internal predecessors, (4997), 30 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-12 23:23:51,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3768 states to 3768 states and 5057 transitions. [2021-11-12 23:23:51,783 INFO L78 Accepts]: Start accepts. Automaton has 3768 states and 5057 transitions. Word has length 64 [2021-11-12 23:23:51,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:51,783 INFO L470 AbstractCegarLoop]: Abstraction has 3768 states and 5057 transitions. [2021-11-12 23:23:51,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3768 states and 5057 transitions. [2021-11-12 23:23:51,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-12 23:23:51,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:51,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:23:51,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:51,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:52,000 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr393REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:23:52,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:52,000 INFO L85 PathProgramCache]: Analyzing trace with hash 533035699, now seen corresponding path program 1 times [2021-11-12 23:23:52,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:52,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483192523] [2021-11-12 23:23:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:52,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:52,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:52,003 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:52,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:23:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:52,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:23:52,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:52,672 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 23:23:52,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:52,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-12 23:23:53,167 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 23:23:53,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:53,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483192523] [2021-11-12 23:23:53,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483192523] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:53,167 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:53,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 23:23:53,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753910803] [2021-11-12 23:23:53,168 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:53,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:23:53,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:53,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:23:53,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:23:53,169 INFO L87 Difference]: Start difference. First operand 3768 states and 5057 transitions. Second operand has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:59,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:59,359 INFO L93 Difference]: Finished difference Result 3767 states and 5043 transitions. [2021-11-12 23:23:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:23:59,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-12 23:23:59,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:59,366 INFO L225 Difference]: With dead ends: 3767 [2021-11-12 23:23:59,366 INFO L226 Difference]: Without dead ends: 3767 [2021-11-12 23:23:59,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:23:59,366 INFO L933 BasicCegarLoop]: 1456 mSDtfsCounter, 1673 mSDsluCounter, 1596 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5352.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1683 SdHoareTripleChecker+Valid, 3052 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.75ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6125.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:59,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1683 Valid, 3052 Invalid, 1416 Unknown, 0 Unchecked, 13.75ms Time], IncrementalHoareTripleChecker [18 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 6125.24ms Time] [2021-11-12 23:23:59,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2021-11-12 23:23:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3715. [2021-11-12 23:23:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3715 states, 2840 states have (on average 1.7376760563380282) internal successors, (4935), 3685 states have internal predecessors, (4935), 30 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-12 23:23:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3715 states to 3715 states and 4995 transitions. [2021-11-12 23:23:59,409 INFO L78 Accepts]: Start accepts. Automaton has 3715 states and 4995 transitions. Word has length 64 [2021-11-12 23:23:59,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:59,409 INFO L470 AbstractCegarLoop]: Abstraction has 3715 states and 4995 transitions. [2021-11-12 23:23:59,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:59,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3715 states and 4995 transitions. [2021-11-12 23:23:59,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:23:59,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:59,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:23:59,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:59,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:59,611 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:23:59,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:59,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391416, now seen corresponding path program 1 times [2021-11-12 23:23:59,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:59,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346929986] [2021-11-12 23:23:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:59,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:59,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:59,613 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:59,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:23:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:59,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:23:59,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:59,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:24:00,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-12 23:24:00,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-12 23:24:00,060 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 23:24:00,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:00,186 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 23:24:00,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:00,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346929986] [2021-11-12 23:24:00,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346929986] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:00,187 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:00,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 23:24:00,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981833225] [2021-11-12 23:24:00,187 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:00,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:24:00,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:00,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:24:00,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:24:00,188 INFO L87 Difference]: Start difference. First operand 3715 states and 4995 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:06,903 INFO L93 Difference]: Finished difference Result 3714 states and 4993 transitions. [2021-11-12 23:24:06,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:06,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-12 23:24:06,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:06,908 INFO L225 Difference]: With dead ends: 3714 [2021-11-12 23:24:06,908 INFO L226 Difference]: Without dead ends: 3714 [2021-11-12 23:24:06,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:06,908 INFO L933 BasicCegarLoop]: 2113 mSDtfsCounter, 4 mSDsluCounter, 3448 mSDsCounter, 0 mSdLazyCounter, 2896 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5725.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5561 SdHoareTripleChecker+Invalid, 2897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.81ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6614.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:06,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 5561 Invalid, 2897 Unknown, 0 Unchecked, 17.81ms Time], IncrementalHoareTripleChecker [1 Valid, 2896 Invalid, 0 Unknown, 0 Unchecked, 6614.06ms Time] [2021-11-12 23:24:06,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3714 states. [2021-11-12 23:24:06,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3714 to 3714. [2021-11-12 23:24:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 2840 states have (on average 1.7369718309859155) internal successors, (4933), 3684 states have internal predecessors, (4933), 30 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-12 23:24:06,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 4993 transitions. [2021-11-12 23:24:06,951 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 4993 transitions. Word has length 67 [2021-11-12 23:24:06,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:06,951 INFO L470 AbstractCegarLoop]: Abstraction has 3714 states and 4993 transitions. [2021-11-12 23:24:06,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:06,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 4993 transitions. [2021-11-12 23:24:06,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:24:06,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:06,953 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:24:06,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:07,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:07,172 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:24:07,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:07,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391415, now seen corresponding path program 1 times [2021-11-12 23:24:07,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:07,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886841905] [2021-11-12 23:24:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:07,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:07,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:07,176 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:07,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:24:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:07,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:24:07,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:07,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:24:07,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:24:07,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-12 23:24:07,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-12 23:24:07,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-12 23:24:07,698 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 23:24:07,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:08,024 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 23:24:08,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:08,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886841905] [2021-11-12 23:24:08,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886841905] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:08,025 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:08,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-12 23:24:08,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931687961] [2021-11-12 23:24:08,025 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:08,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:24:08,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:08,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:24:08,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:24:08,026 INFO L87 Difference]: Start difference. First operand 3714 states and 4993 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:32,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:32,051 INFO L93 Difference]: Finished difference Result 3713 states and 4991 transitions. [2021-11-12 23:24:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:32,052 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-12 23:24:32,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:32,087 INFO L225 Difference]: With dead ends: 3713 [2021-11-12 23:24:32,088 INFO L226 Difference]: Without dead ends: 3713 [2021-11-12 23:24:32,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:24:32,089 INFO L933 BasicCegarLoop]: 2113 mSDtfsCounter, 3 mSDsluCounter, 5779 mSDsCounter, 0 mSdLazyCounter, 4791 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21579.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7892 SdHoareTripleChecker+Invalid, 4792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.31ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23836.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:32,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 7892 Invalid, 4792 Unknown, 0 Unchecked, 32.31ms Time], IncrementalHoareTripleChecker [1 Valid, 4791 Invalid, 0 Unknown, 0 Unchecked, 23836.78ms Time] [2021-11-12 23:24:32,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2021-11-12 23:24:32,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 3713. [2021-11-12 23:24:32,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3713 states, 2838 states have (on average 1.7374911909795632) internal successors, (4931), 3683 states have internal predecessors, (4931), 30 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-12 23:24:32,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3713 states to 3713 states and 4991 transitions. [2021-11-12 23:24:32,151 INFO L78 Accepts]: Start accepts. Automaton has 3713 states and 4991 transitions. Word has length 67 [2021-11-12 23:24:32,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:32,152 INFO L470 AbstractCegarLoop]: Abstraction has 3713 states and 4991 transitions. [2021-11-12 23:24:32,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:32,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3713 states and 4991 transitions. [2021-11-12 23:24:32,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:24:32,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:32,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:24:32,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:32,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:32,368 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr396REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:24:32,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:32,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564532, now seen corresponding path program 1 times [2021-11-12 23:24:32,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:32,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428873269] [2021-11-12 23:24:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:32,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:32,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:32,372 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:32,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:24:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:32,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:24:32,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:32,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:24:32,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-12 23:24:32,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-12 23:24:32,842 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 23:24:32,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:32,964 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 23:24:32,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:32,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428873269] [2021-11-12 23:24:32,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428873269] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:32,965 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:32,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 23:24:32,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902883886] [2021-11-12 23:24:32,965 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:32,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:24:32,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:32,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:24:32,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:24:32,967 INFO L87 Difference]: Start difference. First operand 3713 states and 4991 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:39,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:39,916 INFO L93 Difference]: Finished difference Result 3712 states and 4988 transitions. [2021-11-12 23:24:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:39,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-12 23:24:39,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:39,922 INFO L225 Difference]: With dead ends: 3712 [2021-11-12 23:24:39,922 INFO L226 Difference]: Without dead ends: 3712 [2021-11-12 23:24:39,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:39,923 INFO L933 BasicCegarLoop]: 2111 mSDtfsCounter, 4 mSDsluCounter, 3445 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5908.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5556 SdHoareTripleChecker+Invalid, 2894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.14ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6845.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:39,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 5556 Invalid, 2894 Unknown, 0 Unchecked, 19.14ms Time], IncrementalHoareTripleChecker [1 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 6845.28ms Time] [2021-11-12 23:24:39,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2021-11-12 23:24:39,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3712. [2021-11-12 23:24:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3712 states, 2838 states have (on average 1.7364341085271318) internal successors, (4928), 3682 states have internal predecessors, (4928), 30 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-12 23:24:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3712 states to 3712 states and 4988 transitions. [2021-11-12 23:24:39,969 INFO L78 Accepts]: Start accepts. Automaton has 3712 states and 4988 transitions. Word has length 67 [2021-11-12 23:24:39,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:39,970 INFO L470 AbstractCegarLoop]: Abstraction has 3712 states and 4988 transitions. [2021-11-12 23:24:39,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:39,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3712 states and 4988 transitions. [2021-11-12 23:24:39,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:24:39,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:39,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:24:39,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-12 23:24:40,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:40,184 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr397REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:24:40,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:40,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564533, now seen corresponding path program 1 times [2021-11-12 23:24:40,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:40,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408849359] [2021-11-12 23:24:40,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:40,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:40,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:40,187 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:40,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:24:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:40,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:24:40,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:40,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 23:24:40,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:24:40,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-12 23:24:40,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-12 23:24:40,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-12 23:24:40,699 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 23:24:40,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:40,984 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 23:24:40,984 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:40,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408849359] [2021-11-12 23:24:40,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408849359] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:40,984 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:40,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-12 23:24:40,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743885015] [2021-11-12 23:24:40,985 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:40,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:24:40,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:40,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:24:40,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:24:40,985 INFO L87 Difference]: Start difference. First operand 3712 states and 4988 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:56,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:56,915 INFO L93 Difference]: Finished difference Result 3711 states and 4985 transitions. [2021-11-12 23:24:56,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:56,916 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-12 23:24:56,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:56,936 INFO L225 Difference]: With dead ends: 3711 [2021-11-12 23:24:56,936 INFO L226 Difference]: Without dead ends: 3711 [2021-11-12 23:24:56,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:24:56,937 INFO L933 BasicCegarLoop]: 2111 mSDtfsCounter, 4 mSDsluCounter, 3456 mSDsCounter, 0 mSdLazyCounter, 2880 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14222.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5567 SdHoareTripleChecker+Invalid, 2882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.11ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15800.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:56,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 5567 Invalid, 2882 Unknown, 0 Unchecked, 20.11ms Time], IncrementalHoareTripleChecker [2 Valid, 2880 Invalid, 0 Unknown, 0 Unchecked, 15800.13ms Time] [2021-11-12 23:24:56,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2021-11-12 23:24:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 3711. [2021-11-12 23:24:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3711 states, 2835 states have (on average 1.7372134038800706) internal successors, (4925), 3681 states have internal predecessors, (4925), 30 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-12 23:24:56,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3711 states to 3711 states and 4985 transitions. [2021-11-12 23:24:56,965 INFO L78 Accepts]: Start accepts. Automaton has 3711 states and 4985 transitions. Word has length 67 [2021-11-12 23:24:56,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:56,965 INFO L470 AbstractCegarLoop]: Abstraction has 3711 states and 4985 transitions. [2021-11-12 23:24:56,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:56,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3711 states and 4985 transitions. [2021-11-12 23:24:56,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 23:24:56,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:56,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1] [2021-11-12 23:24:56,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:57,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:57,180 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:24:57,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:57,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1243544783, now seen corresponding path program 1 times [2021-11-12 23:24:57,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:57,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337432990] [2021-11-12 23:24:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:57,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:57,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:57,182 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:57,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 23:24:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:57,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:57,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:57,690 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 23:24:57,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:57,863 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 23:24:57,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:57,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337432990] [2021-11-12 23:24:57,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337432990] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:57,864 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:57,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:24:57,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694217020] [2021-11-12 23:24:57,864 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:57,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:24:57,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:57,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:24:57,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:57,865 INFO L87 Difference]: Start difference. First operand 3711 states and 4985 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:24:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:58,037 INFO L93 Difference]: Finished difference Result 3721 states and 5001 transitions. [2021-11-12 23:24:58,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:58,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 75 [2021-11-12 23:24:58,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:58,057 INFO L225 Difference]: With dead ends: 3721 [2021-11-12 23:24:58,057 INFO L226 Difference]: Without dead ends: 3721 [2021-11-12 23:24:58,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:24:58,059 INFO L933 BasicCegarLoop]: 2109 mSDtfsCounter, 9 mSDsluCounter, 4211 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 6320 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.65ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:58,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 6320 Invalid, 51 Unknown, 0 Unchecked, 5.65ms Time], IncrementalHoareTripleChecker [14 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 114.12ms Time] [2021-11-12 23:24:58,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2021-11-12 23:24:58,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3721. [2021-11-12 23:24:58,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 2843 states have (on average 1.736545902215969) internal successors, (4937), 3690 states have internal predecessors, (4937), 30 states have call successors, (30), 4 states have call predecessors, (30), 5 states have return successors, (34), 27 states have call predecessors, (34), 30 states have call successors, (34) [2021-11-12 23:24:58,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 5001 transitions. [2021-11-12 23:24:58,110 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 5001 transitions. Word has length 75 [2021-11-12 23:24:58,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:58,110 INFO L470 AbstractCegarLoop]: Abstraction has 3721 states and 5001 transitions. [2021-11-12 23:24:58,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:24:58,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 5001 transitions. [2021-11-12 23:24:58,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-12 23:24:58,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:58,112 INFO L514 BasicCegarLoop]: trace histogram [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, 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 23:24:58,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:58,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:58,326 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:24:58,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:58,326 INFO L85 PathProgramCache]: Analyzing trace with hash 520759535, now seen corresponding path program 1 times [2021-11-12 23:24:58,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:58,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606373814] [2021-11-12 23:24:58,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:58,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:58,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:58,327 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:58,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:24:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:58,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:24:58,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:58,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:58,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:58,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606373814] [2021-11-12 23:24:58,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606373814] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:58,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1147883505] [2021-11-12 23:24:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:58,970 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:24:58,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:24:58,975 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:24:58,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-12 23:24:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:59,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:24:59,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:59,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:59,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1147883505] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:59,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067689798] [2021-11-12 23:24:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:59,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:24:59,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:24:59,621 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:24:59,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-12 23:24:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:59,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:24:59,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:00,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:00,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067689798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:00,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:25:00,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2021-11-12 23:25:00,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019267800] [2021-11-12 23:25:00,317 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:25:00,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:25:00,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:00,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:25:00,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:25:00,318 INFO L87 Difference]: Start difference. First operand 3721 states and 5001 transitions. Second operand has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 23:25:00,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:00,868 INFO L93 Difference]: Finished difference Result 3735 states and 5021 transitions. [2021-11-12 23:25:00,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:25:00,869 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 77 [2021-11-12 23:25:00,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:00,876 INFO L225 Difference]: With dead ends: 3735 [2021-11-12 23:25:00,876 INFO L226 Difference]: Without dead ends: 3729 [2021-11-12 23:25:00,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:25:00,877 INFO L933 BasicCegarLoop]: 2109 mSDtfsCounter, 56 mSDsluCounter, 6319 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 233.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 8428 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.18ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 266.20ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:00,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 8428 Invalid, 175 Unknown, 0 Unchecked, 7.18ms Time], IncrementalHoareTripleChecker [54 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 266.20ms Time] [2021-11-12 23:25:00,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2021-11-12 23:25:00,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3727. [2021-11-12 23:25:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 2849 states have (on average 1.7353457353457353) internal successors, (4944), 3696 states have internal predecessors, (4944), 30 states have call successors, (30), 4 states have call predecessors, (30), 5 states have return successors, (34), 27 states have call predecessors, (34), 30 states have call successors, (34) [2021-11-12 23:25:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 5008 transitions. [2021-11-12 23:25:00,962 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 5008 transitions. Word has length 77 [2021-11-12 23:25:00,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:00,963 INFO L470 AbstractCegarLoop]: Abstraction has 3727 states and 5008 transitions. [2021-11-12 23:25:00,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 23:25:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 5008 transitions. [2021-11-12 23:25:00,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 23:25:00,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:00,965 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 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 23:25:00,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:01,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:01,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:01,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:25:01,580 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:25:01,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:01,581 INFO L85 PathProgramCache]: Analyzing trace with hash 991095087, now seen corresponding path program 2 times [2021-11-12 23:25:01,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:01,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063018138] [2021-11-12 23:25:01,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:25:01,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:01,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:01,583 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:01,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 23:25:01,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:25:01,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:02,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:25:02,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:02,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:02,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:02,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063018138] [2021-11-12 23:25:02,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063018138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:02,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [489848883] [2021-11-12 23:25:02,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:25:02,724 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:02,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:25:02,724 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:25:02,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-12 23:25:03,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:25:03,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:03,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:25:03,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:03,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:04,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [489848883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:04,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141399130] [2021-11-12 23:25:04,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:25:04,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:25:04,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:25:04,019 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:25:04,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-12 23:25:22,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:25:22,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:25:22,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:22,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:23,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141399130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:23,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:25:23,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 26 [2021-11-12 23:25:23,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328969834] [2021-11-12 23:25:23,207 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:25:23,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-12 23:25:23,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:23,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-12 23:25:23,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:25:23,209 INFO L87 Difference]: Start difference. First operand 3727 states and 5008 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 23:25:25,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:25,035 INFO L93 Difference]: Finished difference Result 3753 states and 5055 transitions. [2021-11-12 23:25:25,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-12 23:25:25,037 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 81 [2021-11-12 23:25:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:25,045 INFO L225 Difference]: With dead ends: 3753 [2021-11-12 23:25:25,045 INFO L226 Difference]: Without dead ends: 3747 [2021-11-12 23:25:25,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=706, Invalid=1364, Unknown=0, NotChecked=0, Total=2070 [2021-11-12 23:25:25,047 INFO L933 BasicCegarLoop]: 2112 mSDtfsCounter, 85 mSDsluCounter, 18953 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 657.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 21065 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.93ms SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 738.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:25,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 21065 Invalid, 489 Unknown, 0 Unchecked, 14.93ms Time], IncrementalHoareTripleChecker [86 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 738.58ms Time] [2021-11-12 23:25:25,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2021-11-12 23:25:25,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 3739. [2021-11-12 23:25:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 2861 states have (on average 1.7333100314575323) internal successors, (4959), 3708 states have internal predecessors, (4959), 30 states have call successors, (30), 4 states have call predecessors, (30), 5 states have return successors, (34), 27 states have call predecessors, (34), 30 states have call successors, (34) [2021-11-12 23:25:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 5023 transitions. [2021-11-12 23:25:25,123 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 5023 transitions. Word has length 81 [2021-11-12 23:25:25,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:25,124 INFO L470 AbstractCegarLoop]: Abstraction has 3739 states and 5023 transitions. [2021-11-12 23:25:25,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 23:25:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 5023 transitions. [2021-11-12 23:25:25,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 23:25:25,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:25,125 INFO L514 BasicCegarLoop]: trace histogram [14, 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, 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 23:25:25,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:25,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:25,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:25,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:25:25,740 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-11-12 23:25:25,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:25,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1599731281, now seen corresponding path program 3 times [2021-11-12 23:25:25,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:25,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005669962] [2021-11-12 23:25:25,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:25:25,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:25,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:25,742 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:25,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-12 23:25:26,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-12 23:25:26,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:26,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:25:26,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:26,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:28,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:28,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005669962] [2021-11-12 23:25:28,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005669962] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:28,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [402402674] [2021-11-12 23:25:28,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:25:28,317 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:28,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:25:28,318 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:25:28,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-12 23:25:30,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-12 23:25:30,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:30,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:25:30,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:30,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:30,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [402402674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:30,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667579024] [2021-11-12 23:25:30,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:25:30,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:25:30,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:25:30,843 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:25:30,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2febd3f0-29da-4b65-bcf4-ebf3f0c9834a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process