./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0504_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0504_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8 --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 12301886788f8094a18ed4b5591704f8f48140d7 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0504_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8 --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 12301886788f8094a18ed4b5591704f8f48140d7 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:15:25,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:15:25,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:15:25,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:15:25,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:15:25,141 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:15:25,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:15:25,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:15:25,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:15:25,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:15:25,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:15:25,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:15:25,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:15:25,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:15:25,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:15:25,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:15:25,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:15:25,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:15:25,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:15:25,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:15:25,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:15:25,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:15:25,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:15:25,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:15:25,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:15:25,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:15:25,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:15:25,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:15:25,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:15:25,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:15:25,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:15:25,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:15:25,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:15:25,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:15:25,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:15:25,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:15:25,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:15:25,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:15:25,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:15:25,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:15:25,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:15:25,242 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 07:15:25,299 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:15:25,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:15:25,302 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:15:25,302 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:15:25,302 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:15:25,303 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:15:25,303 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:15:25,303 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:15:25,303 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:15:25,303 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:15:25,303 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:15:25,304 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:15:25,304 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:15:25,304 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:15:25,304 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:15:25,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:15:25,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:15:25,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:15:25,306 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:15:25,306 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:15:25,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:15:25,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:15:25,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:15:25,307 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:15:25,307 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:15:25,308 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:15:25,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:15:25,308 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:15:25,308 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:15:25,309 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:15:25,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:15:25,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:15:25,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:15:25,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:15:25,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:15:25,310 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:15:25,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:15:25,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:15:25,311 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:15:25,311 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_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 12301886788f8094a18ed4b5591704f8f48140d7 [2021-10-13 07:15:25,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:15:25,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:15:25,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:15:25,717 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:15:25,719 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:15:25,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-ext-properties/test-0504_1.i [2021-10-13 07:15:25,839 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/data/4df9975a2/189818478187405bb07f17bb4f01cdb1/FLAGccfd84d06 [2021-10-13 07:15:26,453 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:15:26,453 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/sv-benchmarks/c/list-ext-properties/test-0504_1.i [2021-10-13 07:15:26,469 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/data/4df9975a2/189818478187405bb07f17bb4f01cdb1/FLAGccfd84d06 [2021-10-13 07:15:26,724 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/data/4df9975a2/189818478187405bb07f17bb4f01cdb1 [2021-10-13 07:15:26,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:15:26,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:15:26,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:15:26,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:15:26,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:15:26,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:26" (1/1) ... [2021-10-13 07:15:26,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@731b1758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:26, skipping insertion in model container [2021-10-13 07:15:26,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:26" (1/1) ... [2021-10-13 07:15:26,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:15:26,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:15:27,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:15:27,314 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:15:27,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:15:27,447 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:15:27,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27 WrapperNode [2021-10-13 07:15:27,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:15:27,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:15:27,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:15:27,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:15:27,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2021-10-13 07:15:27,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2021-10-13 07:15:27,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:15:27,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:15:27,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:15:27,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:15:27,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2021-10-13 07:15:27,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2021-10-13 07:15:27,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2021-10-13 07:15:27,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2021-10-13 07:15:27,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2021-10-13 07:15:27,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2021-10-13 07:15:27,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2021-10-13 07:15:27,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:15:27,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:15:27,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:15:27,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:15:27,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (1/1) ... [2021-10-13 07:15:27,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:15:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:15:27,652 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:15:27,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:15:27,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:15:27,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:15:27,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:15:27,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:15:27,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:15:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:15:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:15:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:15:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:15:27,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:15:28,442 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:15:28,442 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:15:28,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:28 BoogieIcfgContainer [2021-10-13 07:15:28,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:15:28,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:15:28,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:15:28,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:15:28,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:15:26" (1/3) ... [2021-10-13 07:15:28,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2313d926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:28, skipping insertion in model container [2021-10-13 07:15:28,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:27" (2/3) ... [2021-10-13 07:15:28,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2313d926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:28, skipping insertion in model container [2021-10-13 07:15:28,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:28" (3/3) ... [2021-10-13 07:15:28,455 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0504_1.i [2021-10-13 07:15:28,468 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:15:28,468 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 43 error locations. [2021-10-13 07:15:28,509 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:15:28,515 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, mConcurrency=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 [2021-10-13 07:15:28,515 INFO L340 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2021-10-13 07:15:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 78 states have internal predecessors, (86), 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) [2021-10-13 07:15:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:15:28,542 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:28,543 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:15:28,543 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:28,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:28,551 INFO L82 PathProgramCache]: Analyzing trace with hash 6286950, now seen corresponding path program 1 times [2021-10-13 07:15:28,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:28,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952805505] [2021-10-13 07:15:28,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:28,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:28,856 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:28,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952805505] [2021-10-13 07:15:28,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952805505] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:28,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:28,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:15:28,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881624289] [2021-10-13 07:15:28,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:28,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:28,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:28,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:28,899 INFO L87 Difference]: Start difference. First operand has 79 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 78 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-13 07:15:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:29,174 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2021-10-13 07:15:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:29,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-10-13 07:15:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:29,188 INFO L225 Difference]: With dead ends: 103 [2021-10-13 07:15:29,188 INFO L226 Difference]: Without dead ends: 101 [2021-10-13 07:15:29,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:29,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-13 07:15:29,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2021-10-13 07:15:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 35 states have (on average 2.142857142857143) internal successors, (75), 69 states have internal predecessors, (75), 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) [2021-10-13 07:15:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2021-10-13 07:15:29,232 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 4 [2021-10-13 07:15:29,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:29,233 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2021-10-13 07:15:29,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-13 07:15:29,233 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2021-10-13 07:15:29,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:15:29,234 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:29,234 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:15:29,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:15:29,235 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:29,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:29,236 INFO L82 PathProgramCache]: Analyzing trace with hash 6286951, now seen corresponding path program 1 times [2021-10-13 07:15:29,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:29,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795229718] [2021-10-13 07:15:29,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:29,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:29,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:29,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795229718] [2021-10-13 07:15:29,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795229718] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:29,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:29,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:15:29,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830159187] [2021-10-13 07:15:29,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:29,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:29,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:29,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:29,342 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-13 07:15:29,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:29,515 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2021-10-13 07:15:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:29,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-10-13 07:15:29,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:29,518 INFO L225 Difference]: With dead ends: 104 [2021-10-13 07:15:29,518 INFO L226 Difference]: Without dead ends: 104 [2021-10-13 07:15:29,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-13 07:15:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2021-10-13 07:15:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.951219512195122) internal successors, (80), 70 states have internal predecessors, (80), 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) [2021-10-13 07:15:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2021-10-13 07:15:29,541 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 4 [2021-10-13 07:15:29,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:29,541 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2021-10-13 07:15:29,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-13 07:15:29,542 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2021-10-13 07:15:29,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:15:29,543 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:29,544 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:15:29,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:15:29,549 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:29,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:29,550 INFO L82 PathProgramCache]: Analyzing trace with hash 194733002, now seen corresponding path program 1 times [2021-10-13 07:15:29,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:29,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819146869] [2021-10-13 07:15:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:29,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:29,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:29,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819146869] [2021-10-13 07:15:29,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819146869] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:29,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:29,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:15:29,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641857138] [2021-10-13 07:15:29,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:29,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:29,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:29,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:29,626 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 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) [2021-10-13 07:15:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:29,644 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-10-13 07:15:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:29,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 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 5 [2021-10-13 07:15:29,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:29,647 INFO L225 Difference]: With dead ends: 74 [2021-10-13 07:15:29,647 INFO L226 Difference]: Without dead ends: 74 [2021-10-13 07:15:29,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-13 07:15:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-13 07:15:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 73 states have internal predecessors, (84), 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) [2021-10-13 07:15:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-10-13 07:15:29,655 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 5 [2021-10-13 07:15:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:29,656 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-10-13 07:15:29,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 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) [2021-10-13 07:15:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-10-13 07:15:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:15:29,657 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:29,657 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:15:29,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:15:29,657 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:29,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:29,658 INFO L82 PathProgramCache]: Analyzing trace with hash 194735221, now seen corresponding path program 1 times [2021-10-13 07:15:29,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:29,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657338831] [2021-10-13 07:15:29,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:29,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:29,686 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:29,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657338831] [2021-10-13 07:15:29,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657338831] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:29,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:29,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:15:29,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011113119] [2021-10-13 07:15:29,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:29,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:29,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:29,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:29,690 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-10-13 07:15:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:29,759 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-10-13 07:15:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:29,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 5 [2021-10-13 07:15:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:29,762 INFO L225 Difference]: With dead ends: 75 [2021-10-13 07:15:29,762 INFO L226 Difference]: Without dead ends: 73 [2021-10-13 07:15:29,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-13 07:15:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-10-13 07:15:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 72 states have internal predecessors, (82), 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) [2021-10-13 07:15:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2021-10-13 07:15:29,788 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 5 [2021-10-13 07:15:29,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:29,789 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2021-10-13 07:15:29,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-10-13 07:15:29,790 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2021-10-13 07:15:29,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:15:29,791 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:29,791 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:29,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:15:29,792 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:29,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:29,793 INFO L82 PathProgramCache]: Analyzing trace with hash -91003113, now seen corresponding path program 1 times [2021-10-13 07:15:29,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:29,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174589721] [2021-10-13 07:15:29,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:29,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:29,953 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:29,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174589721] [2021-10-13 07:15:29,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174589721] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:29,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:29,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:15:29,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697681051] [2021-10-13 07:15:29,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:15:29,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:29,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:15:29,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:15:29,956 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-10-13 07:15:30,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:30,078 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2021-10-13 07:15:30,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:15:30,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 [2021-10-13 07:15:30,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:30,080 INFO L225 Difference]: With dead ends: 99 [2021-10-13 07:15:30,080 INFO L226 Difference]: Without dead ends: 99 [2021-10-13 07:15:30,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:15:30,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-13 07:15:30,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 64. [2021-10-13 07:15:30,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.864864864864865) internal successors, (69), 63 states have internal predecessors, (69), 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) [2021-10-13 07:15:30,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2021-10-13 07:15:30,086 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 11 [2021-10-13 07:15:30,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:30,086 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2021-10-13 07:15:30,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-10-13 07:15:30,087 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2021-10-13 07:15:30,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:15:30,087 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:30,088 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:30,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 07:15:30,088 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:30,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:30,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1473870798, now seen corresponding path program 1 times [2021-10-13 07:15:30,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:30,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796947657] [2021-10-13 07:15:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:30,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:30,138 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:30,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796947657] [2021-10-13 07:15:30,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796947657] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:30,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:30,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:15:30,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493359075] [2021-10-13 07:15:30,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:30,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:30,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:30,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:30,142 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2021-10-13 07:15:30,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:30,229 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-10-13 07:15:30,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:30,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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 12 [2021-10-13 07:15:30,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:30,231 INFO L225 Difference]: With dead ends: 60 [2021-10-13 07:15:30,231 INFO L226 Difference]: Without dead ends: 60 [2021-10-13 07:15:30,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:30,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-13 07:15:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-13 07:15:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 59 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:30,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-10-13 07:15:30,245 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 12 [2021-10-13 07:15:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:30,245 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-10-13 07:15:30,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2021-10-13 07:15:30,246 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-10-13 07:15:30,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:15:30,246 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:30,246 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:30,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 07:15:30,247 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:30,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:30,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1473870799, now seen corresponding path program 1 times [2021-10-13 07:15:30,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:30,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578293037] [2021-10-13 07:15:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:30,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:30,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:30,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578293037] [2021-10-13 07:15:30,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578293037] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:30,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:30,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:15:30,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356551646] [2021-10-13 07:15:30,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:30,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:30,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:30,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:30,357 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2021-10-13 07:15:30,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:30,408 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-10-13 07:15:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:30,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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 12 [2021-10-13 07:15:30,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:30,410 INFO L225 Difference]: With dead ends: 56 [2021-10-13 07:15:30,410 INFO L226 Difference]: Without dead ends: 56 [2021-10-13 07:15:30,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:30,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-13 07:15:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-13 07:15:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 55 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-10-13 07:15:30,417 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 12 [2021-10-13 07:15:30,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:30,417 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-10-13 07:15:30,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2021-10-13 07:15:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-10-13 07:15:30,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:15:30,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:30,418 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:30,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 07:15:30,419 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:30,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:30,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1558342481, now seen corresponding path program 1 times [2021-10-13 07:15:30,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:30,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196587923] [2021-10-13 07:15:30,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:30,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:30,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:30,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196587923] [2021-10-13 07:15:30,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196587923] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:30,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:30,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:15:30,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066609662] [2021-10-13 07:15:30,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:30,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:30,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:30,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:30,500 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 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) [2021-10-13 07:15:30,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:30,509 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-10-13 07:15:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:30,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 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 13 [2021-10-13 07:15:30,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:30,510 INFO L225 Difference]: With dead ends: 74 [2021-10-13 07:15:30,511 INFO L226 Difference]: Without dead ends: 74 [2021-10-13 07:15:30,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:30,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-13 07:15:30,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-10-13 07:15:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.509433962264151) internal successors, (80), 71 states have internal predecessors, (80), 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) [2021-10-13 07:15:30,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2021-10-13 07:15:30,514 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 13 [2021-10-13 07:15:30,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:30,514 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2021-10-13 07:15:30,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 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) [2021-10-13 07:15:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2021-10-13 07:15:30,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:15:30,515 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:30,515 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:30,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 07:15:30,516 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:30,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:30,516 INFO L82 PathProgramCache]: Analyzing trace with hash -949264770, now seen corresponding path program 1 times [2021-10-13 07:15:30,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:30,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567863631] [2021-10-13 07:15:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:30,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:30,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:30,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567863631] [2021-10-13 07:15:30,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567863631] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:30,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:30,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:15:30,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796214409] [2021-10-13 07:15:30,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:15:30,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:30,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:15:30,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:15:30,586 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:30,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:30,770 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2021-10-13 07:15:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:15:30,771 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 07:15:30,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:30,773 INFO L225 Difference]: With dead ends: 130 [2021-10-13 07:15:30,773 INFO L226 Difference]: Without dead ends: 130 [2021-10-13 07:15:30,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:15:30,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-13 07:15:30,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 84. [2021-10-13 07:15:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.476923076923077) internal successors, (96), 83 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2021-10-13 07:15:30,777 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 14 [2021-10-13 07:15:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:30,778 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2021-10-13 07:15:30,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2021-10-13 07:15:30,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:15:30,779 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:30,779 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:30,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 07:15:30,780 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:30,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:30,780 INFO L82 PathProgramCache]: Analyzing trace with hash -949264769, now seen corresponding path program 1 times [2021-10-13 07:15:30,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:30,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329237082] [2021-10-13 07:15:30,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:30,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:31,127 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:31,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329237082] [2021-10-13 07:15:31,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329237082] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:31,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:31,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 07:15:31,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320714093] [2021-10-13 07:15:31,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 07:15:31,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:31,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 07:15:31,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:15:31,131 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:31,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:31,701 INFO L93 Difference]: Finished difference Result 158 states and 174 transitions. [2021-10-13 07:15:31,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:15:31,702 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 07:15:31,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:31,703 INFO L225 Difference]: With dead ends: 158 [2021-10-13 07:15:31,703 INFO L226 Difference]: Without dead ends: 158 [2021-10-13 07:15:31,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:15:31,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-13 07:15:31,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 84. [2021-10-13 07:15:31,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.4461538461538461) internal successors, (94), 83 states have internal predecessors, (94), 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) [2021-10-13 07:15:31,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-10-13 07:15:31,708 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2021-10-13 07:15:31,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:31,708 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-10-13 07:15:31,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:31,709 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-10-13 07:15:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:15:31,709 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:31,710 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:31,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 07:15:31,710 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:31,726 INFO L82 PathProgramCache]: Analyzing trace with hash -278674579, now seen corresponding path program 1 times [2021-10-13 07:15:31,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:31,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218044835] [2021-10-13 07:15:31,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:31,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:31,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:31,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218044835] [2021-10-13 07:15:31,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218044835] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:31,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:31,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:15:31,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891751457] [2021-10-13 07:15:31,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:15:31,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:31,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:15:31,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:15:31,771 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2021-10-13 07:15:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:31,911 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2021-10-13 07:15:31,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:15:31,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 16 [2021-10-13 07:15:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:31,913 INFO L225 Difference]: With dead ends: 114 [2021-10-13 07:15:31,914 INFO L226 Difference]: Without dead ends: 114 [2021-10-13 07:15:31,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:15:31,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-13 07:15:31,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2021-10-13 07:15:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 67 states have (on average 1.462686567164179) internal successors, (98), 85 states have internal predecessors, (98), 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) [2021-10-13 07:15:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2021-10-13 07:15:31,919 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 16 [2021-10-13 07:15:31,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:31,919 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2021-10-13 07:15:31,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2021-10-13 07:15:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2021-10-13 07:15:31,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:15:31,921 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:31,921 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:31,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 07:15:31,921 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:31,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:31,922 INFO L82 PathProgramCache]: Analyzing trace with hash -278674578, now seen corresponding path program 1 times [2021-10-13 07:15:31,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:31,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735429133] [2021-10-13 07:15:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:31,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:32,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:32,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735429133] [2021-10-13 07:15:32,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735429133] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:32,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:32,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:15:32,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374485097] [2021-10-13 07:15:32,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:15:32,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:32,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:15:32,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:15:32,011 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2021-10-13 07:15:32,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:32,129 INFO L93 Difference]: Finished difference Result 146 states and 167 transitions. [2021-10-13 07:15:32,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:15:32,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 16 [2021-10-13 07:15:32,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:32,131 INFO L225 Difference]: With dead ends: 146 [2021-10-13 07:15:32,131 INFO L226 Difference]: Without dead ends: 146 [2021-10-13 07:15:32,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:15:32,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-13 07:15:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 105. [2021-10-13 07:15:32,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.441860465116279) internal successors, (124), 104 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) [2021-10-13 07:15:32,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2021-10-13 07:15:32,137 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 16 [2021-10-13 07:15:32,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:32,137 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2021-10-13 07:15:32,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2021-10-13 07:15:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2021-10-13 07:15:32,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:15:32,140 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:32,140 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:32,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 07:15:32,141 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:32,141 INFO L82 PathProgramCache]: Analyzing trace with hash -278672360, now seen corresponding path program 1 times [2021-10-13 07:15:32,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:32,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837135565] [2021-10-13 07:15:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:32,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:32,191 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:32,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837135565] [2021-10-13 07:15:32,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837135565] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:32,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:32,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:15:32,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798211660] [2021-10-13 07:15:32,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:15:32,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:32,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:15:32,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:15:32,195 INFO L87 Difference]: Start difference. First operand 105 states and 124 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2021-10-13 07:15:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:32,216 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2021-10-13 07:15:32,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:15:32,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 16 [2021-10-13 07:15:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:32,220 INFO L225 Difference]: With dead ends: 105 [2021-10-13 07:15:32,220 INFO L226 Difference]: Without dead ends: 105 [2021-10-13 07:15:32,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:15:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-13 07:15:32,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-10-13 07:15:32,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.4186046511627908) internal successors, (122), 104 states have internal predecessors, (122), 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) [2021-10-13 07:15:32,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2021-10-13 07:15:32,226 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 16 [2021-10-13 07:15:32,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:32,227 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2021-10-13 07:15:32,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2021-10-13 07:15:32,227 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2021-10-13 07:15:32,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:15:32,229 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:32,229 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:32,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-13 07:15:32,230 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:32,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:32,230 INFO L82 PathProgramCache]: Analyzing trace with hash -48975625, now seen corresponding path program 1 times [2021-10-13 07:15:32,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:32,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437900578] [2021-10-13 07:15:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:32,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:15:32,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:32,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437900578] [2021-10-13 07:15:32,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437900578] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:32,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:32,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:15:32,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325896114] [2021-10-13 07:15:32,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:15:32,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:32,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:15:32,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:15:32,283 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2021-10-13 07:15:32,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:32,384 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2021-10-13 07:15:32,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:15:32,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 17 [2021-10-13 07:15:32,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:32,386 INFO L225 Difference]: With dead ends: 123 [2021-10-13 07:15:32,386 INFO L226 Difference]: Without dead ends: 123 [2021-10-13 07:15:32,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:15:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-13 07:15:32,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 111. [2021-10-13 07:15:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 93 states have (on average 1.4623655913978495) internal successors, (136), 110 states have internal predecessors, (136), 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) [2021-10-13 07:15:32,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 136 transitions. [2021-10-13 07:15:32,390 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 136 transitions. Word has length 17 [2021-10-13 07:15:32,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:32,391 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 136 transitions. [2021-10-13 07:15:32,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2021-10-13 07:15:32,391 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 136 transitions. [2021-10-13 07:15:32,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:15:32,392 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:32,392 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:32,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-13 07:15:32,392 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:32,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:32,393 INFO L82 PathProgramCache]: Analyzing trace with hash -48975624, now seen corresponding path program 1 times [2021-10-13 07:15:32,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:32,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079828358] [2021-10-13 07:15:32,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:32,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:32,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:32,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079828358] [2021-10-13 07:15:32,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079828358] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:32,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:32,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:15:32,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28056413] [2021-10-13 07:15:32,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:15:32,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:32,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:15:32,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:15:32,467 INFO L87 Difference]: Start difference. First operand 111 states and 136 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:32,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:32,697 INFO L93 Difference]: Finished difference Result 186 states and 230 transitions. [2021-10-13 07:15:32,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:15:32,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 07:15:32,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:32,699 INFO L225 Difference]: With dead ends: 186 [2021-10-13 07:15:32,699 INFO L226 Difference]: Without dead ends: 186 [2021-10-13 07:15:32,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:15:32,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-10-13 07:15:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 125. [2021-10-13 07:15:32,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 107 states have (on average 1.5420560747663552) internal successors, (165), 124 states have internal predecessors, (165), 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) [2021-10-13 07:15:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 165 transitions. [2021-10-13 07:15:32,703 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 165 transitions. Word has length 17 [2021-10-13 07:15:32,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:32,704 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 165 transitions. [2021-10-13 07:15:32,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:32,704 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 165 transitions. [2021-10-13 07:15:32,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 07:15:32,705 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:32,705 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:32,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-13 07:15:32,705 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:32,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:32,706 INFO L82 PathProgramCache]: Analyzing trace with hash 179119758, now seen corresponding path program 1 times [2021-10-13 07:15:32,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:32,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426880020] [2021-10-13 07:15:32,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:32,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:32,802 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:32,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426880020] [2021-10-13 07:15:32,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426880020] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:32,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:32,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 07:15:32,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189666886] [2021-10-13 07:15:32,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:15:32,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:32,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:15:32,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:15:32,807 INFO L87 Difference]: Start difference. First operand 125 states and 165 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-10-13 07:15:32,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:32,999 INFO L93 Difference]: Finished difference Result 182 states and 235 transitions. [2021-10-13 07:15:33,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:15:33,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 19 [2021-10-13 07:15:33,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:33,001 INFO L225 Difference]: With dead ends: 182 [2021-10-13 07:15:33,001 INFO L226 Difference]: Without dead ends: 182 [2021-10-13 07:15:33,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:15:33,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-13 07:15:33,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 131. [2021-10-13 07:15:33,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 113 states have (on average 1.5221238938053097) internal successors, (172), 130 states have internal predecessors, (172), 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) [2021-10-13 07:15:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 172 transitions. [2021-10-13 07:15:33,006 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 172 transitions. Word has length 19 [2021-10-13 07:15:33,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:33,007 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 172 transitions. [2021-10-13 07:15:33,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-10-13 07:15:33,007 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 172 transitions. [2021-10-13 07:15:33,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 07:15:33,008 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:33,008 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:33,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-13 07:15:33,008 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:33,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:33,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1257795051, now seen corresponding path program 1 times [2021-10-13 07:15:33,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:33,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378317115] [2021-10-13 07:15:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:33,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:33,055 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:33,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378317115] [2021-10-13 07:15:33,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378317115] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:33,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:33,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:15:33,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417785775] [2021-10-13 07:15:33,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:15:33,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:33,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:15:33,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:15:33,057 INFO L87 Difference]: Start difference. First operand 131 states and 172 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2021-10-13 07:15:33,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:33,180 INFO L93 Difference]: Finished difference Result 157 states and 206 transitions. [2021-10-13 07:15:33,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:15:33,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 [2021-10-13 07:15:33,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:33,186 INFO L225 Difference]: With dead ends: 157 [2021-10-13 07:15:33,186 INFO L226 Difference]: Without dead ends: 157 [2021-10-13 07:15:33,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:15:33,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-10-13 07:15:33,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 147. [2021-10-13 07:15:33,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 129 states have (on average 1.5968992248062015) internal successors, (206), 146 states have internal predecessors, (206), 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) [2021-10-13 07:15:33,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 206 transitions. [2021-10-13 07:15:33,201 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 206 transitions. Word has length 20 [2021-10-13 07:15:33,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:33,202 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 206 transitions. [2021-10-13 07:15:33,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2021-10-13 07:15:33,202 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 206 transitions. [2021-10-13 07:15:33,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 07:15:33,203 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:33,203 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:33,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-13 07:15:33,204 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:33,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:33,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1879625964, now seen corresponding path program 1 times [2021-10-13 07:15:33,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:33,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935351150] [2021-10-13 07:15:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:33,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:33,239 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:15:33,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256173382] [2021-10-13 07:15:33,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:33,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:15:33,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:15:33,248 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:15:33,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:15:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:33,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:15:33,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:33,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:15:33,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 07:15:33,693 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-10-13 07:15:33,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-10-13 07:15:33,848 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:15:33,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-10-13 07:15:33,937 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 30 treesize of output 18 [2021-10-13 07:15:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:33,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:34,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:34,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935351150] [2021-10-13 07:15:34,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:15:34,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256173382] [2021-10-13 07:15:34,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256173382] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:15:34,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [65053508] [2021-10-13 07:15:34,319 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-10-13 07:15:34,319 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:15:34,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:15:34,331 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:15:34,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:15:34,380 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:34,383 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:15:34,384 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:34,384 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 07:15:34,385 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:15:34,386 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:34,386 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 07:15:34,389 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-10-13 07:15:34,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:34,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-13 07:15:34,414 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:34,414 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-13 07:15:34,415 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:34,415 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-13 07:15:34,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:15:34,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:15:34,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:34,428 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:34,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-10-13 07:15:34,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:15:34,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:107, output treesize:108 [2021-10-13 07:15:34,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:34,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-13 07:15:34,668 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_88| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:15:34,673 INFO L168 Benchmark]: Toolchain (without parser) took 7943.99 ms. Allocated memory was 127.9 MB in the beginning and 178.3 MB in the end (delta: 50.3 MB). Free memory was 85.2 MB in the beginning and 148.9 MB in the end (delta: -63.7 MB). Peak memory consumption was 91.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:34,674 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 127.9 MB. Free memory is still 103.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:15:34,674 INFO L168 Benchmark]: CACSL2BoogieTranslator took 711.27 ms. Allocated memory is still 127.9 MB. Free memory was 85.0 MB in the beginning and 92.9 MB in the end (delta: -7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:34,675 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.52 ms. Allocated memory is still 127.9 MB. Free memory was 92.9 MB in the beginning and 90.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:34,675 INFO L168 Benchmark]: Boogie Preprocessor took 72.17 ms. Allocated memory is still 127.9 MB. Free memory was 90.7 MB in the beginning and 89.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:34,676 INFO L168 Benchmark]: RCFGBuilder took 836.58 ms. Allocated memory is still 127.9 MB. Free memory was 88.6 MB in the beginning and 66.1 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:34,676 INFO L168 Benchmark]: TraceAbstraction took 6224.68 ms. Allocated memory was 127.9 MB in the beginning and 178.3 MB in the end (delta: 50.3 MB). Free memory was 65.6 MB in the beginning and 148.9 MB in the end (delta: -83.3 MB). Peak memory consumption was 74.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:34,679 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 127.9 MB. Free memory is still 103.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 711.27 ms. Allocated memory is still 127.9 MB. Free memory was 85.0 MB in the beginning and 92.9 MB in the end (delta: -7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 85.52 ms. Allocated memory is still 127.9 MB. Free memory was 92.9 MB in the beginning and 90.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 72.17 ms. Allocated memory is still 127.9 MB. Free memory was 90.7 MB in the beginning and 89.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 836.58 ms. Allocated memory is still 127.9 MB. Free memory was 88.6 MB in the beginning and 66.1 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6224.68 ms. Allocated memory was 127.9 MB in the beginning and 178.3 MB in the end (delta: 50.3 MB). Free memory was 65.6 MB in the beginning and 148.9 MB in the end (delta: -83.3 MB). Peak memory consumption was 74.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_88| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_88|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:15:34,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:15:37,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:15:37,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:15:37,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:15:37,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:15:37,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:15:37,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:15:37,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:15:37,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:15:37,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:15:37,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:15:37,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:15:37,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:15:37,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:15:37,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:15:37,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:15:37,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:15:37,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:15:37,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:15:37,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:15:37,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:15:37,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:15:37,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:15:37,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:15:37,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:15:37,717 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:15:37,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:15:37,719 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:15:37,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:15:37,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:15:37,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:15:37,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:15:37,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:15:37,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:15:37,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:15:37,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:15:37,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:15:37,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:15:37,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:15:37,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:15:37,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:15:37,745 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 07:15:37,797 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:15:37,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:15:37,799 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:15:37,799 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:15:37,800 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:15:37,800 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:15:37,800 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:15:37,801 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:15:37,801 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:15:37,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:15:37,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:15:37,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:15:37,803 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:15:37,803 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:15:37,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:15:37,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:15:37,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:15:37,804 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:15:37,805 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:15:37,805 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:15:37,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:15:37,806 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:15:37,806 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:15:37,806 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:15:37,806 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:15:37,807 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:15:37,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:15:37,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:15:37,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:15:37,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:15:37,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:15:37,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:15:37,809 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:15:37,809 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:15:37,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:15:37,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:15:37,810 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_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 12301886788f8094a18ed4b5591704f8f48140d7 [2021-10-13 07:15:38,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:15:38,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:15:38,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:15:38,372 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:15:38,373 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:15:38,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-ext-properties/test-0504_1.i [2021-10-13 07:15:38,463 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/data/b3a679eba/d95803988fd14006af985f4dca81610a/FLAG6094801eb [2021-10-13 07:15:39,280 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:15:39,281 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/sv-benchmarks/c/list-ext-properties/test-0504_1.i [2021-10-13 07:15:39,300 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/data/b3a679eba/d95803988fd14006af985f4dca81610a/FLAG6094801eb [2021-10-13 07:15:39,547 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/data/b3a679eba/d95803988fd14006af985f4dca81610a [2021-10-13 07:15:39,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:15:39,552 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:15:39,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:15:39,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:15:39,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:15:39,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:39" (1/1) ... [2021-10-13 07:15:39,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@732c1eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:39, skipping insertion in model container [2021-10-13 07:15:39,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:39" (1/1) ... [2021-10-13 07:15:39,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:15:39,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:15:40,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:15:40,106 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:15:40,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:15:40,220 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:15:40,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:40 WrapperNode [2021-10-13 07:15:40,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:15:40,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:15:40,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:15:40,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:15:40,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:40" (1/1) ... [2021-10-13 07:15:40,300 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:40" (1/1) ... [2021-10-13 07:15:40,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:15:40,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:15:40,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:15:40,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:15:40,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:40" (1/1) ... [2021-10-13 07:15:40,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:40" (1/1) ... [2021-10-13 07:15:40,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:40" (1/1) ... [2021-10-13 07:15:40,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:40" (1/1) ... [2021-10-13 07:15:40,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:40" (1/1) ... [2021-10-13 07:15:40,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:40" (1/1) ... [2021-10-13 07:15:40,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:40" (1/1) ... [2021-10-13 07:15:40,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:15:40,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:15:40,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:15:40,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:15:40,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:40" (1/1) ... [2021-10-13 07:15:40,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:15:40,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:15:40,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:15:40,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:15:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:15:40,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:15:40,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:15:40,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:15:40,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:15:40,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:15:40,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:15:40,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:15:40,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:15:40,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:15:41,506 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:15:41,507 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:15:41,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:41 BoogieIcfgContainer [2021-10-13 07:15:41,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:15:41,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:15:41,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:15:41,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:15:41,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:15:39" (1/3) ... [2021-10-13 07:15:41,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e8ba07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:41, skipping insertion in model container [2021-10-13 07:15:41,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:40" (2/3) ... [2021-10-13 07:15:41,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e8ba07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:41, skipping insertion in model container [2021-10-13 07:15:41,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:41" (3/3) ... [2021-10-13 07:15:41,519 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0504_1.i [2021-10-13 07:15:41,525 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:15:41,525 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 43 error locations. [2021-10-13 07:15:41,591 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:15:41,600 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, mConcurrency=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 [2021-10-13 07:15:41,600 INFO L340 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2021-10-13 07:15:41,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 89 states have internal predecessors, (101), 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) [2021-10-13 07:15:41,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:15:41,630 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:41,630 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:15:41,631 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:41,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:41,639 INFO L82 PathProgramCache]: Analyzing trace with hash 28700584, now seen corresponding path program 1 times [2021-10-13 07:15:41,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:15:41,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63886217] [2021-10-13 07:15:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:41,665 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:15:41,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:15:41,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:15:41,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:15:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:41,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:15:41,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:41,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:41,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:15:41,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63886217] [2021-10-13 07:15:41,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63886217] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:41,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:41,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:15:41,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312567494] [2021-10-13 07:15:41,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:15:41,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:15:42,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:15:42,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:15:42,008 INFO L87 Difference]: Start difference. First operand has 90 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 89 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-10-13 07:15:42,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:42,133 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2021-10-13 07:15:42,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:15:42,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 5 [2021-10-13 07:15:42,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:42,154 INFO L225 Difference]: With dead ends: 97 [2021-10-13 07:15:42,155 INFO L226 Difference]: Without dead ends: 93 [2021-10-13 07:15:42,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:15:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-13 07:15:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2021-10-13 07:15:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 89 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-10-13 07:15:42,218 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 5 [2021-10-13 07:15:42,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:42,219 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-10-13 07:15:42,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-10-13 07:15:42,220 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-10-13 07:15:42,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:15:42,221 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:42,221 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:15:42,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:42,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:15:42,442 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:42,443 INFO L82 PathProgramCache]: Analyzing trace with hash 28699819, now seen corresponding path program 1 times [2021-10-13 07:15:42,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:15:42,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833366832] [2021-10-13 07:15:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:42,444 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:15:42,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:15:42,449 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:15:42,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:15:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:42,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:15:42,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:42,598 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 [2021-10-13 07:15:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:42,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:42,665 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:15:42,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833366832] [2021-10-13 07:15:42,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833366832] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:42,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:42,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:15:42,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268064092] [2021-10-13 07:15:42,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:42,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:15:42,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:42,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:42,677 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2021-10-13 07:15:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:43,043 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2021-10-13 07:15:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:43,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 5 [2021-10-13 07:15:43,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:43,047 INFO L225 Difference]: With dead ends: 115 [2021-10-13 07:15:43,048 INFO L226 Difference]: Without dead ends: 115 [2021-10-13 07:15:43,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-13 07:15:43,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2021-10-13 07:15:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 47 states have (on average 1.872340425531915) internal successors, (88), 81 states have internal predecessors, (88), 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) [2021-10-13 07:15:43,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2021-10-13 07:15:43,077 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 5 [2021-10-13 07:15:43,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:43,079 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2021-10-13 07:15:43,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2021-10-13 07:15:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2021-10-13 07:15:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:15:43,083 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:43,083 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:15:43,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:43,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:15:43,297 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:43,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:43,306 INFO L82 PathProgramCache]: Analyzing trace with hash 28699820, now seen corresponding path program 1 times [2021-10-13 07:15:43,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:15:43,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105647758] [2021-10-13 07:15:43,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:43,308 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:15:43,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:15:43,315 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:15:43,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:15:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:43,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:15:43,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:43,435 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 [2021-10-13 07:15:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:43,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:43,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:15:43,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105647758] [2021-10-13 07:15:43,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105647758] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:43,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:43,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:15:43,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164020572] [2021-10-13 07:15:43,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:15:43,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:15:43,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:15:43,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:15:43,611 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-10-13 07:15:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:44,312 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2021-10-13 07:15:44,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:44,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 5 [2021-10-13 07:15:44,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:44,317 INFO L225 Difference]: With dead ends: 119 [2021-10-13 07:15:44,317 INFO L226 Difference]: Without dead ends: 119 [2021-10-13 07:15:44,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:15:44,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-13 07:15:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2021-10-13 07:15:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 81 states have internal predecessors, (92), 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) [2021-10-13 07:15:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2021-10-13 07:15:44,327 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 5 [2021-10-13 07:15:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:44,327 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2021-10-13 07:15:44,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-10-13 07:15:44,331 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2021-10-13 07:15:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:15:44,331 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:44,332 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:15:44,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:44,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:15:44,549 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:44,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:44,550 INFO L82 PathProgramCache]: Analyzing trace with hash 889717790, now seen corresponding path program 1 times [2021-10-13 07:15:44,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:15:44,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758868365] [2021-10-13 07:15:44,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:44,552 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:15:44,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:15:44,553 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:15:44,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:15:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:44,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:15:44,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:44,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:44,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:15:44,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758868365] [2021-10-13 07:15:44,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758868365] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:44,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:44,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:15:44,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082776578] [2021-10-13 07:15:44,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:44,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:15:44,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:44,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:44,686 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:44,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:44,925 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2021-10-13 07:15:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:44,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:15:44,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:44,929 INFO L225 Difference]: With dead ends: 84 [2021-10-13 07:15:44,929 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 07:15:44,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:44,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 07:15:44,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-13 07:15:44,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 80 states have internal predecessors, (90), 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) [2021-10-13 07:15:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2021-10-13 07:15:44,936 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 6 [2021-10-13 07:15:44,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:44,937 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2021-10-13 07:15:44,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2021-10-13 07:15:44,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:15:44,938 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:44,938 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:44,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:45,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:15:45,152 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:45,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:45,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1286398787, now seen corresponding path program 1 times [2021-10-13 07:15:45,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:15:45,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46791218] [2021-10-13 07:15:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:45,154 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:15:45,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:15:45,156 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:15:45,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:15:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:45,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:15:45,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:45,309 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 [2021-10-13 07:15:45,330 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 [2021-10-13 07:15:45,595 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:15:45,595 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 28 treesize of output 30 [2021-10-13 07:15:45,607 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:15:45,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-10-13 07:15:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:45,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:50,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:15:50,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46791218] [2021-10-13 07:15:50,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46791218] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:50,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:50,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 07:15:50,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339491594] [2021-10-13 07:15:50,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:15:50,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:15:50,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:15:50,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=15, Unknown=2, NotChecked=0, Total=30 [2021-10-13 07:15:50,580 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 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) [2021-10-13 07:15:58,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:58,118 INFO L93 Difference]: Finished difference Result 214 states and 230 transitions. [2021-10-13 07:15:58,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:15:58,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 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 [2021-10-13 07:15:58,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:58,121 INFO L225 Difference]: With dead ends: 214 [2021-10-13 07:15:58,121 INFO L226 Difference]: Without dead ends: 214 [2021-10-13 07:15:58,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10398.2ms TimeCoverageRelationStatistics Valid=26, Invalid=27, Unknown=3, NotChecked=0, Total=56 [2021-10-13 07:15:58,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-10-13 07:15:58,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 73. [2021-10-13 07:15:58,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 72 states have internal predecessors, (78), 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) [2021-10-13 07:15:58,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2021-10-13 07:15:58,132 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 13 [2021-10-13 07:15:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:58,133 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2021-10-13 07:15:58,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 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) [2021-10-13 07:15:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2021-10-13 07:15:58,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:15:58,134 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:58,135 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:58,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:58,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:15:58,347 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:58,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1223687433, now seen corresponding path program 1 times [2021-10-13 07:15:58,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:15:58,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275361997] [2021-10-13 07:15:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:58,350 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:15:58,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:15:58,351 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:15:58,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:15:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:58,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:15:58,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:58,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:58,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:15:58,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275361997] [2021-10-13 07:15:58,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275361997] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:58,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:58,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:15:58,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281192690] [2021-10-13 07:15:58,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:58,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:15:58,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:58,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:58,826 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:58,860 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2021-10-13 07:15:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:58,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 07:15:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:58,862 INFO L225 Difference]: With dead ends: 104 [2021-10-13 07:15:58,862 INFO L226 Difference]: Without dead ends: 104 [2021-10-13 07:15:58,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-13 07:15:58,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2021-10-13 07:15:58,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 93 states have internal predecessors, (110), 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) [2021-10-13 07:15:58,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2021-10-13 07:15:58,871 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 14 [2021-10-13 07:15:58,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:58,871 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2021-10-13 07:15:58,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:58,872 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2021-10-13 07:15:58,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:15:58,873 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:58,873 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:58,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:59,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:15:59,088 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1223656742, now seen corresponding path program 1 times [2021-10-13 07:15:59,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:15:59,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147951964] [2021-10-13 07:15:59,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:59,090 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:15:59,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:15:59,091 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:15:59,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:15:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:59,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:15:59,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:59,279 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 [2021-10-13 07:15:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:59,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:59,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:15:59,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147951964] [2021-10-13 07:15:59,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147951964] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:59,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:59,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:15:59,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782494525] [2021-10-13 07:15:59,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:59,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:15:59,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:59,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:59,374 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:59,579 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2021-10-13 07:15:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:59,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 07:15:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:59,581 INFO L225 Difference]: With dead ends: 90 [2021-10-13 07:15:59,581 INFO L226 Difference]: Without dead ends: 90 [2021-10-13 07:15:59,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:59,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-13 07:15:59,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-10-13 07:15:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 89 states have internal predecessors, (102), 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) [2021-10-13 07:15:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2021-10-13 07:15:59,588 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 14 [2021-10-13 07:15:59,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:59,589 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2021-10-13 07:15:59,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2021-10-13 07:15:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:15:59,590 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:59,590 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:59,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:59,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:15:59,805 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:15:59,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:59,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1223656741, now seen corresponding path program 1 times [2021-10-13 07:15:59,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:15:59,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442024380] [2021-10-13 07:15:59,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:59,806 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:15:59,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:15:59,808 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:15:59,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:15:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:59,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:15:59,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:59,998 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 [2021-10-13 07:16:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:00,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:00,171 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:00,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442024380] [2021-10-13 07:16:00,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442024380] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:00,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:00,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:16:00,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824714549] [2021-10-13 07:16:00,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:16:00,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:00,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:16:00,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:16:00,173 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-10-13 07:16:00,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:00,589 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-10-13 07:16:00,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:16:00,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 07:16:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:00,595 INFO L225 Difference]: With dead ends: 86 [2021-10-13 07:16:00,595 INFO L226 Difference]: Without dead ends: 86 [2021-10-13 07:16:00,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:16:00,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-13 07:16:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-10-13 07:16:00,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 67 states have (on average 1.4029850746268657) internal successors, (94), 85 states have internal predecessors, (94), 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) [2021-10-13 07:16:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-10-13 07:16:00,601 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 14 [2021-10-13 07:16:00,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:00,602 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-10-13 07:16:00,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-10-13 07:16:00,602 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-10-13 07:16:00,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:16:00,615 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:00,615 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:00,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:00,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:00,826 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:16:00,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:00,827 INFO L82 PathProgramCache]: Analyzing trace with hash 857288497, now seen corresponding path program 1 times [2021-10-13 07:16:00,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:00,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221672954] [2021-10-13 07:16:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:00,828 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:00,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:00,829 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:00,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:16:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:01,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:16:01,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:01,023 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 [2021-10-13 07:16:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:01,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:01,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:01,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221672954] [2021-10-13 07:16:01,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221672954] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:01,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:01,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:16:01,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955004337] [2021-10-13 07:16:01,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:16:01,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:01,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:16:01,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:16:01,250 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2021-10-13 07:16:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:01,740 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2021-10-13 07:16:01,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:16:01,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 16 [2021-10-13 07:16:01,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:01,742 INFO L225 Difference]: With dead ends: 120 [2021-10-13 07:16:01,742 INFO L226 Difference]: Without dead ends: 120 [2021-10-13 07:16:01,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:16:01,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-13 07:16:01,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 88. [2021-10-13 07:16:01,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 87 states have internal predecessors, (98), 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) [2021-10-13 07:16:01,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-10-13 07:16:01,748 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 16 [2021-10-13 07:16:01,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:01,748 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-10-13 07:16:01,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2021-10-13 07:16:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-10-13 07:16:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:16:01,750 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:01,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:01,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-10-13 07:16:01,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:01,963 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:16:01,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:01,963 INFO L82 PathProgramCache]: Analyzing trace with hash 857288498, now seen corresponding path program 1 times [2021-10-13 07:16:01,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:01,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852400341] [2021-10-13 07:16:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:01,965 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:01,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:01,966 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:01,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:16:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:02,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:16:02,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:02,128 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 [2021-10-13 07:16:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:02,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:02,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:02,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852400341] [2021-10-13 07:16:02,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852400341] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:02,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:02,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 07:16:02,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722706116] [2021-10-13 07:16:02,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:16:02,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:02,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:16:02,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:16:02,725 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2021-10-13 07:16:03,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:03,698 INFO L93 Difference]: Finished difference Result 157 states and 178 transitions. [2021-10-13 07:16:03,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:16:03,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 07:16:03,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:03,701 INFO L225 Difference]: With dead ends: 157 [2021-10-13 07:16:03,701 INFO L226 Difference]: Without dead ends: 157 [2021-10-13 07:16:03,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 213.9ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:16:03,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-10-13 07:16:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2021-10-13 07:16:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 91 states have (on average 1.4175824175824177) internal successors, (129), 109 states have internal predecessors, (129), 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) [2021-10-13 07:16:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2021-10-13 07:16:03,707 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 16 [2021-10-13 07:16:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:03,708 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2021-10-13 07:16:03,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2021-10-13 07:16:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2021-10-13 07:16:03,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:16:03,709 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:03,709 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:03,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:03,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:03,910 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:16:03,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:03,910 INFO L82 PathProgramCache]: Analyzing trace with hash 806139317, now seen corresponding path program 1 times [2021-10-13 07:16:03,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:03,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032114327] [2021-10-13 07:16:03,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:03,911 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:03,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:03,912 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:03,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:16:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:04,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:16:04,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:04,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:04,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:04,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032114327] [2021-10-13 07:16:04,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032114327] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:16:04,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [119338913] [2021-10-13 07:16:04,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:04,294 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:16:04,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:16:04,304 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:16:04,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 07:16:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:04,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:16:04,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:04,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:04,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [119338913] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:16:04,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53728893] [2021-10-13 07:16:04,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:04,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:16:04,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:16:04,780 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:16:04,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 07:16:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:05,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:16:05,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:05,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:05,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53728893] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:16:05,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:16:05,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-10-13 07:16:05,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204088384] [2021-10-13 07:16:05,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:16:05,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:05,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:16:05,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:16:05,192 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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) [2021-10-13 07:16:05,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:05,393 INFO L93 Difference]: Finished difference Result 146 states and 165 transitions. [2021-10-13 07:16:05,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:16:05,394 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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 17 [2021-10-13 07:16:05,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:05,396 INFO L225 Difference]: With dead ends: 146 [2021-10-13 07:16:05,396 INFO L226 Difference]: Without dead ends: 146 [2021-10-13 07:16:05,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:16:05,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-13 07:16:05,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 131. [2021-10-13 07:16:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 130 states have internal predecessors, (165), 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) [2021-10-13 07:16:05,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 165 transitions. [2021-10-13 07:16:05,403 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 165 transitions. Word has length 17 [2021-10-13 07:16:05,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:05,403 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 165 transitions. [2021-10-13 07:16:05,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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) [2021-10-13 07:16:05,403 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 165 transitions. [2021-10-13 07:16:05,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:16:05,404 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:05,404 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:05,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:05,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:05,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:06,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:16:06,006 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:16:06,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:06,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1724432386, now seen corresponding path program 1 times [2021-10-13 07:16:06,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:06,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970320450] [2021-10-13 07:16:06,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:06,008 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:06,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:06,009 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:06,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 07:16:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:06,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:16:06,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:06,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:16:06,338 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 07:16:06,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:16:06,455 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:16:06,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:16:06,701 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-10-13 07:16:06,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 39 [2021-10-13 07:16:06,850 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 07:16:06,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 22 [2021-10-13 07:16:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:06,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:07,063 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-10-13 07:16:07,064 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 32 treesize of output 31 [2021-10-13 07:16:07,103 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:07,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:16:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:07,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:07,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970320450] [2021-10-13 07:16:07,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970320450] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:07,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:07,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2021-10-13 07:16:07,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473021539] [2021-10-13 07:16:07,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 07:16:07,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:07,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 07:16:07,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:16:07,143 INFO L87 Difference]: Start difference. First operand 131 states and 165 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:08,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:08,360 INFO L93 Difference]: Finished difference Result 210 states and 263 transitions. [2021-10-13 07:16:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:16:08,361 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 07:16:08,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:08,362 INFO L225 Difference]: With dead ends: 210 [2021-10-13 07:16:08,363 INFO L226 Difference]: Without dead ends: 210 [2021-10-13 07:16:08,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:16:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-10-13 07:16:08,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 143. [2021-10-13 07:16:08,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 124 states have (on average 1.4435483870967742) internal successors, (179), 142 states have internal predecessors, (179), 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) [2021-10-13 07:16:08,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2021-10-13 07:16:08,369 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 17 [2021-10-13 07:16:08,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:08,370 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2021-10-13 07:16:08,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:08,370 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2021-10-13 07:16:08,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:16:08,371 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:08,371 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:08,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:08,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:08,575 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:16:08,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:08,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1724432387, now seen corresponding path program 1 times [2021-10-13 07:16:08,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:08,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819526447] [2021-10-13 07:16:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:08,577 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:08,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:08,578 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:08,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 07:16:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:08,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 07:16:08,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:08,926 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 [2021-10-13 07:16:08,936 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 [2021-10-13 07:16:09,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:16:09,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:16:09,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:09,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:16:09,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:09,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:16:09,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:09,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:09,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:09,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:16:09,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:09,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:09,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:09,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:16:09,439 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:16:09,440 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 12 treesize of output 18 [2021-10-13 07:16:09,505 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:16:09,506 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 17 treesize of output 17 [2021-10-13 07:16:09,893 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-13 07:16:09,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 62 [2021-10-13 07:16:09,961 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-13 07:16:09,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 58 [2021-10-13 07:16:10,181 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-13 07:16:10,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 55 [2021-10-13 07:16:10,193 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-13 07:16:10,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 23 [2021-10-13 07:16:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:10,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:13,350 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:13,352 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-10-13 07:16:13,356 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:13,357 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-13 07:16:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:21,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:21,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819526447] [2021-10-13 07:16:21,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819526447] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:21,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:21,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 14 [2021-10-13 07:16:21,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858575007] [2021-10-13 07:16:21,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 07:16:21,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:21,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 07:16:21,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=166, Unknown=1, NotChecked=0, Total=210 [2021-10-13 07:16:21,496 INFO L87 Difference]: Start difference. First operand 143 states and 179 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:34,446 WARN L207 SmtUtils]: Spent 8.18 s on a formula simplification that was a NOOP. DAG size: 39 [2021-10-13 07:16:41,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:41,168 INFO L93 Difference]: Finished difference Result 375 states and 481 transitions. [2021-10-13 07:16:41,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 07:16:41,170 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 07:16:41,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:41,172 INFO L225 Difference]: With dead ends: 375 [2021-10-13 07:16:41,172 INFO L226 Difference]: Without dead ends: 375 [2021-10-13 07:16:41,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 22232.4ms TimeCoverageRelationStatistics Valid=162, Invalid=436, Unknown=2, NotChecked=0, Total=600 [2021-10-13 07:16:41,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-10-13 07:16:41,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 143. [2021-10-13 07:16:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 124 states have (on average 1.4274193548387097) internal successors, (177), 142 states have internal predecessors, (177), 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) [2021-10-13 07:16:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 177 transitions. [2021-10-13 07:16:41,181 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 177 transitions. Word has length 17 [2021-10-13 07:16:41,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:41,182 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 177 transitions. [2021-10-13 07:16:41,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 177 transitions. [2021-10-13 07:16:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:16:41,183 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:41,183 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:41,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:41,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:41,395 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:16:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:41,396 INFO L82 PathProgramCache]: Analyzing trace with hash -779472846, now seen corresponding path program 1 times [2021-10-13 07:16:41,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:41,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977983215] [2021-10-13 07:16:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:41,396 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:41,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:41,399 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:41,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 07:16:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:41,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:16:41,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:41,692 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 [2021-10-13 07:16:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:41,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:41,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:41,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977983215] [2021-10-13 07:16:41,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977983215] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:41,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:41,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 07:16:41,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059416485] [2021-10-13 07:16:41,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:16:41,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:41,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:16:41,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:16:41,955 INFO L87 Difference]: Start difference. First operand 143 states and 177 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-10-13 07:16:43,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:43,014 INFO L93 Difference]: Finished difference Result 201 states and 246 transitions. [2021-10-13 07:16:43,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:16:43,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 07:16:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:43,017 INFO L225 Difference]: With dead ends: 201 [2021-10-13 07:16:43,017 INFO L226 Difference]: Without dead ends: 201 [2021-10-13 07:16:43,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:16:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-10-13 07:16:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 161. [2021-10-13 07:16:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 142 states have (on average 1.4859154929577465) internal successors, (211), 160 states have internal predecessors, (211), 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) [2021-10-13 07:16:43,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 211 transitions. [2021-10-13 07:16:43,024 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 211 transitions. Word has length 18 [2021-10-13 07:16:43,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:43,024 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 211 transitions. [2021-10-13 07:16:43,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-10-13 07:16:43,025 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 211 transitions. [2021-10-13 07:16:43,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:16:43,025 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:43,026 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:43,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:43,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:43,239 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:16:43,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:43,239 INFO L82 PathProgramCache]: Analyzing trace with hash -779472845, now seen corresponding path program 1 times [2021-10-13 07:16:43,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:43,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355463565] [2021-10-13 07:16:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:43,241 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:43,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:43,242 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:43,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 07:16:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:43,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:16:43,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:43,554 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 [2021-10-13 07:16:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:43,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:44,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:44,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355463565] [2021-10-13 07:16:44,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355463565] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:44,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:44,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-13 07:16:44,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57237914] [2021-10-13 07:16:44,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:16:44,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:44,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:16:44,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:16:44,270 INFO L87 Difference]: Start difference. First operand 161 states and 211 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 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) [2021-10-13 07:16:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:46,608 INFO L93 Difference]: Finished difference Result 297 states and 387 transitions. [2021-10-13 07:16:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:16:46,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 07:16:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:46,611 INFO L225 Difference]: With dead ends: 297 [2021-10-13 07:16:46,611 INFO L226 Difference]: Without dead ends: 297 [2021-10-13 07:16:46,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 697.9ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:16:46,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-10-13 07:16:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 219. [2021-10-13 07:16:46,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 200 states have (on average 1.52) internal successors, (304), 218 states have internal predecessors, (304), 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) [2021-10-13 07:16:46,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 304 transitions. [2021-10-13 07:16:46,621 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 304 transitions. Word has length 18 [2021-10-13 07:16:46,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:46,622 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 304 transitions. [2021-10-13 07:16:46,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 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) [2021-10-13 07:16:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 304 transitions. [2021-10-13 07:16:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:16:46,624 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:46,624 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:46,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:46,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:46,843 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:16:46,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:46,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1612692029, now seen corresponding path program 1 times [2021-10-13 07:16:46,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:46,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324044576] [2021-10-13 07:16:46,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:46,844 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:46,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:46,845 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:46,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 07:16:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:47,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:16:47,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:47,182 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 [2021-10-13 07:16:47,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:16:47,313 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 07:16:47,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:16:47,445 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:16:47,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:16:47,810 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 07:16:47,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-10-13 07:16:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:47,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:48,177 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:48,178 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-10-13 07:16:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:48,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:48,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324044576] [2021-10-13 07:16:48,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324044576] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:48,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:48,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 11 [2021-10-13 07:16:48,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151670810] [2021-10-13 07:16:48,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 07:16:48,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:48,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 07:16:48,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:16:48,317 INFO L87 Difference]: Start difference. First operand 219 states and 304 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 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) [2021-10-13 07:16:50,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:50,725 INFO L93 Difference]: Finished difference Result 318 states and 422 transitions. [2021-10-13 07:16:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 07:16:50,726 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 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 21 [2021-10-13 07:16:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:50,729 INFO L225 Difference]: With dead ends: 318 [2021-10-13 07:16:50,729 INFO L226 Difference]: Without dead ends: 318 [2021-10-13 07:16:50,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 889.0ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-10-13 07:16:50,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-10-13 07:16:50,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 229. [2021-10-13 07:16:50,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 210 states have (on average 1.519047619047619) internal successors, (319), 228 states have internal predecessors, (319), 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) [2021-10-13 07:16:50,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 319 transitions. [2021-10-13 07:16:50,741 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 319 transitions. Word has length 21 [2021-10-13 07:16:50,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:50,742 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 319 transitions. [2021-10-13 07:16:50,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 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) [2021-10-13 07:16:50,742 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 319 transitions. [2021-10-13 07:16:50,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:16:50,743 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:50,744 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:50,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:50,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:50,960 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:16:50,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:50,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1612692030, now seen corresponding path program 1 times [2021-10-13 07:16:50,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:50,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93278960] [2021-10-13 07:16:50,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:50,961 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:50,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:50,962 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:50,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 07:16:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:51,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:16:51,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:51,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:16:51,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:16:51,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:51,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:16:51,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:51,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:16:51,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:51,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:51,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:51,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:51,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:16:51,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:51,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:51,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:16:51,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:16:52,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:52,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 13 [2021-10-13 07:16:52,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-10-13 07:16:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:52,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:52,600 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:52,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-13 07:16:52,605 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:16:52,606 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-13 07:16:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:52,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:52,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93278960] [2021-10-13 07:16:52,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93278960] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:52,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:52,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 7] imperfect sequences [] total 14 [2021-10-13 07:16:52,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112861866] [2021-10-13 07:16:52,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:16:52,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:52,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:16:52,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:16:52,764 INFO L87 Difference]: Start difference. First operand 229 states and 319 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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) [2021-10-13 07:16:55,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:55,136 INFO L93 Difference]: Finished difference Result 291 states and 378 transitions. [2021-10-13 07:16:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 07:16:55,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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 21 [2021-10-13 07:16:55,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:55,138 INFO L225 Difference]: With dead ends: 291 [2021-10-13 07:16:55,139 INFO L226 Difference]: Without dead ends: 291 [2021-10-13 07:16:55,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1236.8ms TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-10-13 07:16:55,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-10-13 07:16:55,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 213. [2021-10-13 07:16:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 194 states have (on average 1.4639175257731958) internal successors, (284), 212 states have internal predecessors, (284), 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) [2021-10-13 07:16:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 284 transitions. [2021-10-13 07:16:55,148 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 284 transitions. Word has length 21 [2021-10-13 07:16:55,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:55,148 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 284 transitions. [2021-10-13 07:16:55,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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) [2021-10-13 07:16:55,149 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 284 transitions. [2021-10-13 07:16:55,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 07:16:55,150 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:55,150 INFO L512 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] [2021-10-13 07:16:55,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:55,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:55,364 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:16:55,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:55,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1546155751, now seen corresponding path program 1 times [2021-10-13 07:16:55,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:55,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62855223] [2021-10-13 07:16:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:55,365 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:55,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:55,366 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:55,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 07:16:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:55,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:16:55,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:55,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:56,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:56,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62855223] [2021-10-13 07:16:56,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62855223] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:56,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:56,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-10-13 07:16:56,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707341404] [2021-10-13 07:16:56,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 07:16:56,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:56,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 07:16:56,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:16:56,145 INFO L87 Difference]: Start difference. First operand 213 states and 284 transitions. Second operand has 9 states, 8 states have (on average 5.5) internal successors, (44), 9 states have internal predecessors, (44), 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) [2021-10-13 07:16:57,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:57,063 INFO L93 Difference]: Finished difference Result 242 states and 312 transitions. [2021-10-13 07:16:57,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:16:57,064 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 9 states have internal predecessors, (44), 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 [2021-10-13 07:16:57,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:57,067 INFO L225 Difference]: With dead ends: 242 [2021-10-13 07:16:57,067 INFO L226 Difference]: Without dead ends: 242 [2021-10-13 07:16:57,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 306.3ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:16:57,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-13 07:16:57,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 222. [2021-10-13 07:16:57,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 203 states have (on average 1.4926108374384237) internal successors, (303), 221 states have internal predecessors, (303), 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) [2021-10-13 07:16:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 303 transitions. [2021-10-13 07:16:57,076 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 303 transitions. Word has length 22 [2021-10-13 07:16:57,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:57,076 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 303 transitions. [2021-10-13 07:16:57,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 9 states have internal predecessors, (44), 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) [2021-10-13 07:16:57,077 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 303 transitions. [2021-10-13 07:16:57,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 07:16:57,077 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:57,078 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 07:16:57,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-13 07:16:57,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:57,293 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:16:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:57,294 INFO L82 PathProgramCache]: Analyzing trace with hash 858860942, now seen corresponding path program 1 times [2021-10-13 07:16:57,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:57,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512747329] [2021-10-13 07:16:57,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:57,295 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:57,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:57,297 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:57,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 07:16:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:57,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:16:57,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:57,722 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 [2021-10-13 07:16:57,852 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:16:57,852 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 16 treesize of output 21 [2021-10-13 07:16:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:57,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:58,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:58,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512747329] [2021-10-13 07:16:58,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512747329] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:16:58,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1741367001] [2021-10-13 07:16:58,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:58,127 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:16:58,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:16:58,139 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:16:58,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-13 07:16:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:58,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:16:58,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:58,737 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 [2021-10-13 07:16:58,825 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:16:58,825 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 16 treesize of output 21 [2021-10-13 07:16:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:58,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:59,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1741367001] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:16:59,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771183666] [2021-10-13 07:16:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:59,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:16:59,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:16:59,058 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:16:59,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 07:16:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:59,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:16:59,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:59,602 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:16:59,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-10-13 07:16:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:59,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:08,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771183666] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:08,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:17:08,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 4, 4] total 6 [2021-10-13 07:17:08,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975440998] [2021-10-13 07:17:08,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:17:08,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:08,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:17:08,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=23, Unknown=4, NotChecked=0, Total=42 [2021-10-13 07:17:08,295 INFO L87 Difference]: Start difference. First operand 222 states and 303 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 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) [2021-10-13 07:17:11,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:11,295 INFO L93 Difference]: Finished difference Result 252 states and 319 transitions. [2021-10-13 07:17:11,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:17:11,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 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 25 [2021-10-13 07:17:11,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:11,298 INFO L225 Difference]: With dead ends: 252 [2021-10-13 07:17:11,298 INFO L226 Difference]: Without dead ends: 252 [2021-10-13 07:17:11,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 132 SyntacticMatches, 8 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 10352.9ms TimeCoverageRelationStatistics Valid=29, Invalid=38, Unknown=5, NotChecked=0, Total=72 [2021-10-13 07:17:11,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-10-13 07:17:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 221. [2021-10-13 07:17:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 203 states have (on average 1.477832512315271) internal successors, (300), 220 states have internal predecessors, (300), 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) [2021-10-13 07:17:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 300 transitions. [2021-10-13 07:17:11,307 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 300 transitions. Word has length 25 [2021-10-13 07:17:11,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:11,308 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 300 transitions. [2021-10-13 07:17:11,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 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) [2021-10-13 07:17:11,308 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 300 transitions. [2021-10-13 07:17:11,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 07:17:11,309 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:11,310 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 07:17:11,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:11,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:11,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:11,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:17:11,923 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:17:11,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:11,924 INFO L82 PathProgramCache]: Analyzing trace with hash 858860943, now seen corresponding path program 1 times [2021-10-13 07:17:11,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:11,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457338520] [2021-10-13 07:17:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:11,924 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:11,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:11,925 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:11,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-13 07:17:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:12,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:17:12,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:12,342 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 [2021-10-13 07:17:12,568 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:17:12,569 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 12 treesize of output 14 [2021-10-13 07:17:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:12,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:13,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:13,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457338520] [2021-10-13 07:17:13,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457338520] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:13,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [943384119] [2021-10-13 07:17:13,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:13,498 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:17:13,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:17:13,511 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:17:13,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-10-13 07:17:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:14,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:17:14,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:14,242 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 [2021-10-13 07:17:14,251 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 [2021-10-13 07:17:14,560 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:17:14,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 07:17:14,578 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:17:14,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-10-13 07:17:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:15,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:23,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [943384119] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:23,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556658139] [2021-10-13 07:17:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:23,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:17:23,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:17:23,612 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:17:23,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-13 07:17:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:24,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:17:24,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:24,286 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 [2021-10-13 07:17:24,514 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:17:24,515 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 28 treesize of output 30 [2021-10-13 07:17:24,533 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:17:24,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-10-13 07:17:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:24,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:31,860 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 07:17:31,860 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 38 treesize of output 37 [2021-10-13 07:17:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:34,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556658139] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:34,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:17:34,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4, 4, 5, 5] total 12 [2021-10-13 07:17:34,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420223010] [2021-10-13 07:17:34,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 07:17:34,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:34,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 07:17:34,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=108, Unknown=3, NotChecked=0, Total=156 [2021-10-13 07:17:34,115 INFO L87 Difference]: Start difference. First operand 221 states and 300 transitions. Second operand has 13 states, 12 states have (on average 7.25) internal successors, (87), 13 states have internal predecessors, (87), 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) [2021-10-13 07:17:35,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:35,470 INFO L93 Difference]: Finished difference Result 325 states and 422 transitions. [2021-10-13 07:17:35,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:17:35,471 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.25) internal successors, (87), 13 states have internal predecessors, (87), 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 25 [2021-10-13 07:17:35,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:35,473 INFO L225 Difference]: With dead ends: 325 [2021-10-13 07:17:35,473 INFO L226 Difference]: Without dead ends: 325 [2021-10-13 07:17:35,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 16539.2ms TimeCoverageRelationStatistics Valid=96, Invalid=173, Unknown=3, NotChecked=0, Total=272 [2021-10-13 07:17:35,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-10-13 07:17:35,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 220. [2021-10-13 07:17:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 203 states have (on average 1.4630541871921183) internal successors, (297), 219 states have internal predecessors, (297), 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) [2021-10-13 07:17:35,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 297 transitions. [2021-10-13 07:17:35,483 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 297 transitions. Word has length 25 [2021-10-13 07:17:35,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:35,494 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 297 transitions. [2021-10-13 07:17:35,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.25) internal successors, (87), 13 states have internal predecessors, (87), 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) [2021-10-13 07:17:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 297 transitions. [2021-10-13 07:17:35,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:17:35,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:35,496 INFO L512 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] [2021-10-13 07:17:35,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:35,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:35,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:36,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:36,097 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:17:36,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:36,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1822218349, now seen corresponding path program 1 times [2021-10-13 07:17:36,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:36,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485535958] [2021-10-13 07:17:36,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:36,098 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:36,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:36,107 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:36,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-13 07:17:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:36,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:17:36,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:36,645 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-10-13 07:17:36,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-10-13 07:17:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:42,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:49,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:49,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485535958] [2021-10-13 07:17:49,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485535958] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:49,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [343981492] [2021-10-13 07:17:49,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:49,128 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:17:49,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:17:49,129 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:17:49,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-10-13 07:17:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:49,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:17:49,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:52,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:54,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [343981492] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:54,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317552066] [2021-10-13 07:17:54,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:54,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:17:54,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:17:54,456 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:17:54,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-13 07:17:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:55,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:17:55,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:55,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:01,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317552066] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:01,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:18:01,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 16 [2021-10-13 07:18:01,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157182100] [2021-10-13 07:18:01,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 07:18:01,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:18:01,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 07:18:01,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=210, Unknown=5, NotChecked=0, Total=272 [2021-10-13 07:18:01,544 INFO L87 Difference]: Start difference. First operand 220 states and 297 transitions. Second operand has 17 states, 16 states have (on average 4.8125) internal successors, (77), 17 states have internal predecessors, (77), 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) [2021-10-13 07:18:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:05,229 INFO L93 Difference]: Finished difference Result 248 states and 336 transitions. [2021-10-13 07:18:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:18:05,229 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.8125) internal successors, (77), 17 states have internal predecessors, (77), 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 26 [2021-10-13 07:18:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:05,231 INFO L225 Difference]: With dead ends: 248 [2021-10-13 07:18:05,231 INFO L226 Difference]: Without dead ends: 236 [2021-10-13 07:18:05,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 18914.7ms TimeCoverageRelationStatistics Valid=99, Invalid=316, Unknown=5, NotChecked=0, Total=420 [2021-10-13 07:18:05,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-10-13 07:18:05,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 213. [2021-10-13 07:18:05,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 196 states have (on average 1.4744897959183674) internal successors, (289), 212 states have internal predecessors, (289), 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) [2021-10-13 07:18:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 289 transitions. [2021-10-13 07:18:05,239 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 289 transitions. Word has length 26 [2021-10-13 07:18:05,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:05,239 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 289 transitions. [2021-10-13 07:18:05,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.8125) internal successors, (77), 17 states have internal predecessors, (77), 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) [2021-10-13 07:18:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 289 transitions. [2021-10-13 07:18:05,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 07:18:05,241 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:05,241 INFO L512 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] [2021-10-13 07:18:05,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:05,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:05,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:05,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:18:05,853 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:18:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:05,854 INFO L82 PathProgramCache]: Analyzing trace with hash -535670236, now seen corresponding path program 1 times [2021-10-13 07:18:05,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:18:05,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017211647] [2021-10-13 07:18:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:05,854 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:18:05,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:18:05,856 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:18:05,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-13 07:18:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:06,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:18:06,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:06,481 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 [2021-10-13 07:18:06,491 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 [2021-10-13 07:18:06,664 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:18:06,664 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 29 treesize of output 31 [2021-10-13 07:18:06,670 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:18:06,670 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 28 treesize of output 24 [2021-10-13 07:18:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:06,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:09,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:18:09,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017211647] [2021-10-13 07:18:09,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017211647] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:09,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1383475705] [2021-10-13 07:18:09,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:09,943 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:18:09,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:18:09,947 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:18:09,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-10-13 07:18:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:10,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:18:10,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:10,817 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 [2021-10-13 07:18:10,828 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 [2021-10-13 07:18:11,015 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:18:11,016 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 28 treesize of output 30 [2021-10-13 07:18:11,024 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:18:11,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-10-13 07:18:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:11,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:14,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1383475705] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:14,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021199649] [2021-10-13 07:18:14,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:14,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:18:14,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:18:14,155 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:18:14,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-13 07:18:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:15,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:18:15,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:15,040 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 [2021-10-13 07:18:15,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:18:15,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:18:15,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:15,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:18:15,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:15,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:18:15,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:15,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:15,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:15,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:18:15,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:15,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:15,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:15,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:18:15,538 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:18:15,539 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 12 treesize of output 18 [2021-10-13 07:18:15,602 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:18:15,602 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 16 treesize of output 16 [2021-10-13 07:18:15,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:15,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:15,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-10-13 07:18:15,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:15,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:15,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-10-13 07:18:16,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:16,118 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-10-13 07:18:16,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 48 [2021-10-13 07:18:16,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:18:16,129 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-10-13 07:18:16,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 21 [2021-10-13 07:18:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:16,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:27,556 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:27,556 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-10-13 07:18:27,559 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:18:27,560 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-13 07:18:32,339 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 07:18:32,340 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 47 treesize of output 46 [2021-10-13 07:18:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:36,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021199649] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:36,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:18:36,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 11, 10] total 21 [2021-10-13 07:18:36,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853446262] [2021-10-13 07:18:36,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 07:18:36,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:18:36,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 07:18:36,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=325, Unknown=8, NotChecked=0, Total=462 [2021-10-13 07:18:36,709 INFO L87 Difference]: Start difference. First operand 213 states and 289 transitions. Second operand has 22 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 22 states have internal predecessors, (83), 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) [2021-10-13 07:18:39,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:18:39,983 INFO L93 Difference]: Finished difference Result 338 states and 437 transitions. [2021-10-13 07:18:39,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 07:18:39,984 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 07:18:39,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:18:39,986 INFO L225 Difference]: With dead ends: 338 [2021-10-13 07:18:39,986 INFO L226 Difference]: Without dead ends: 338 [2021-10-13 07:18:39,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 25269.0ms TimeCoverageRelationStatistics Valid=399, Invalid=925, Unknown=8, NotChecked=0, Total=1332 [2021-10-13 07:18:39,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-10-13 07:18:39,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 229. [2021-10-13 07:18:39,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 212 states have (on average 1.4433962264150944) internal successors, (306), 228 states have internal predecessors, (306), 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) [2021-10-13 07:18:39,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 306 transitions. [2021-10-13 07:18:39,994 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 306 transitions. Word has length 28 [2021-10-13 07:18:39,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:18:39,995 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 306 transitions. [2021-10-13 07:18:39,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 22 states have internal predecessors, (83), 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) [2021-10-13 07:18:39,995 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 306 transitions. [2021-10-13 07:18:39,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 07:18:39,996 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:18:39,996 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:18:40,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:40,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-10-13 07:18:40,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-10-13 07:18:40,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:18:40,624 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:18:40,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:18:40,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1492384592, now seen corresponding path program 1 times [2021-10-13 07:18:40,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:18:40,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283357830] [2021-10-13 07:18:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:40,625 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:18:40,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:18:40,626 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:18:40,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-13 07:18:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:41,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:18:41,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:41,398 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 [2021-10-13 07:18:41,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-10-13 07:18:41,515 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-10-13 07:18:41,515 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 23 treesize of output 28 [2021-10-13 07:18:41,683 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:18:41,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 38 [2021-10-13 07:18:41,872 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:18:41,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 40 [2021-10-13 07:18:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:41,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:42,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:18:42,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283357830] [2021-10-13 07:18:42,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283357830] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:42,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1973847577] [2021-10-13 07:18:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:42,207 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:18:42,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:18:42,211 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:18:42,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-10-13 07:18:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:43,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:18:43,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:43,269 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:18:43,269 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 16 treesize of output 21 [2021-10-13 07:18:43,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-10-13 07:18:43,527 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-10-13 07:18:43,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 43 [2021-10-13 07:18:43,875 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:18:43,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 49 [2021-10-13 07:18:44,106 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:18:44,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 40 [2021-10-13 07:18:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:44,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:44,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1973847577] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:44,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30623326] [2021-10-13 07:18:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:18:44,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:18:44,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:18:44,285 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:18:44,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-13 07:18:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:18:45,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:18:45,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:45,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-10-13 07:18:45,139 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-10-13 07:18:45,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 41 [2021-10-13 07:18:45,474 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:18:45,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 43 [2021-10-13 07:18:45,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2021-10-13 07:18:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:45,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:06,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30623326] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:06,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:19:06,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8, 6, 7, 7] total 21 [2021-10-13 07:19:06,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841580819] [2021-10-13 07:19:06,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 07:19:06,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:19:06,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 07:19:06,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=369, Unknown=5, NotChecked=0, Total=462 [2021-10-13 07:19:06,357 INFO L87 Difference]: Start difference. First operand 229 states and 306 transitions. Second operand has 22 states, 21 states have (on average 3.619047619047619) internal successors, (76), 22 states have internal predecessors, (76), 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) [2021-10-13 07:19:15,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:15,230 INFO L93 Difference]: Finished difference Result 248 states and 323 transitions. [2021-10-13 07:19:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 07:19:15,231 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.619047619047619) internal successors, (76), 22 states have internal predecessors, (76), 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 29 [2021-10-13 07:19:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:15,233 INFO L225 Difference]: With dead ends: 248 [2021-10-13 07:19:15,233 INFO L226 Difference]: Without dead ends: 248 [2021-10-13 07:19:15,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 141 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 22826.1ms TimeCoverageRelationStatistics Valid=222, Invalid=643, Unknown=5, NotChecked=0, Total=870 [2021-10-13 07:19:15,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-10-13 07:19:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 228. [2021-10-13 07:19:15,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 212 states have (on average 1.4339622641509433) internal successors, (304), 227 states have internal predecessors, (304), 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) [2021-10-13 07:19:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 304 transitions. [2021-10-13 07:19:15,240 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 304 transitions. Word has length 29 [2021-10-13 07:19:15,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:15,240 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 304 transitions. [2021-10-13 07:19:15,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.619047619047619) internal successors, (76), 22 states have internal predecessors, (76), 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) [2021-10-13 07:19:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 304 transitions. [2021-10-13 07:19:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 07:19:15,242 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:15,242 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:19:15,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:15,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:15,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-10-13 07:19:15,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:19:15,847 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:19:15,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:15,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1492384593, now seen corresponding path program 1 times [2021-10-13 07:19:15,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:19:15,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369911150] [2021-10-13 07:19:15,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:15,848 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:19:15,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:19:15,848 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:19:15,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-13 07:19:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:16,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:19:16,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:16,715 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 [2021-10-13 07:19:16,724 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 [2021-10-13 07:19:16,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:19:16,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-13 07:19:16,964 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 07:19:16,964 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 16 treesize of output 18 [2021-10-13 07:19:16,997 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:19:16,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-10-13 07:19:17,178 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:19:17,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-13 07:19:17,210 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:19:17,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 42 [2021-10-13 07:19:17,345 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:19:17,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 46 [2021-10-13 07:19:17,351 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:19:17,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-10-13 07:19:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:17,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:21,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:19:21,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369911150] [2021-10-13 07:19:21,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369911150] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:21,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [824024403] [2021-10-13 07:19:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:21,559 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:19:21,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:19:21,567 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:19:21,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-10-13 07:19:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:22,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:19:22,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:22,788 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 [2021-10-13 07:19:22,798 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 [2021-10-13 07:19:22,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:19:22,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-13 07:19:22,997 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 07:19:22,997 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 16 treesize of output 18 [2021-10-13 07:19:23,028 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:19:23,028 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 23 treesize of output 23 [2021-10-13 07:19:23,176 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:19:23,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-13 07:19:23,212 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:19:23,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 38 [2021-10-13 07:19:23,341 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:19:23,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 46 [2021-10-13 07:19:23,347 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:19:23,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-10-13 07:19:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:23,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:26,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [824024403] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:26,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171017257] [2021-10-13 07:19:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:26,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:19:26,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:19:26,467 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:19:26,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-13 07:19:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:27,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:19:27,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:27,334 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 [2021-10-13 07:19:27,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-13 07:19:27,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:19:27,671 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:19:27,671 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 23 treesize of output 23 [2021-10-13 07:19:27,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 07:19:27,846 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:19:27,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-13 07:19:27,894 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:19:27,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 38 [2021-10-13 07:19:28,056 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:19:28,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 46 [2021-10-13 07:19:28,065 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:19:28,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-10-13 07:19:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:28,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:31,047 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 07:19:31,047 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 37 treesize of output 36 [2021-10-13 07:19:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:33,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171017257] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:33,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:19:33,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 15 [2021-10-13 07:19:33,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950433981] [2021-10-13 07:19:33,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 07:19:33,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:19:33,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 07:19:33,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=197, Unknown=2, NotChecked=0, Total=240 [2021-10-13 07:19:33,389 INFO L87 Difference]: Start difference. First operand 228 states and 304 transitions. Second operand has 16 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 16 states have internal predecessors, (56), 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) [2021-10-13 07:19:43,832 WARN L207 SmtUtils]: Spent 8.45 s on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-10-13 07:19:56,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:56,083 INFO L93 Difference]: Finished difference Result 287 states and 348 transitions. [2021-10-13 07:19:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 07:19:56,084 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 16 states have internal predecessors, (56), 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 29 [2021-10-13 07:19:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:56,085 INFO L225 Difference]: With dead ends: 287 [2021-10-13 07:19:56,085 INFO L226 Difference]: Without dead ends: 287 [2021-10-13 07:19:56,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 150 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 30538.9ms TimeCoverageRelationStatistics Valid=189, Invalid=564, Unknown=3, NotChecked=0, Total=756 [2021-10-13 07:19:56,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-13 07:19:56,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 214. [2021-10-13 07:19:56,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 199 states have (on average 1.4472361809045227) internal successors, (288), 213 states have internal predecessors, (288), 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) [2021-10-13 07:19:56,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 288 transitions. [2021-10-13 07:19:56,091 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 288 transitions. Word has length 29 [2021-10-13 07:19:56,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:56,091 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 288 transitions. [2021-10-13 07:19:56,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 16 states have internal predecessors, (56), 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) [2021-10-13 07:19:56,092 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 288 transitions. [2021-10-13 07:19:56,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 07:19:56,092 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:56,093 INFO L512 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] [2021-10-13 07:19:56,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:56,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:56,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-10-13 07:19:56,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:19:56,706 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:19:56,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:56,706 INFO L82 PathProgramCache]: Analyzing trace with hash -2004836766, now seen corresponding path program 1 times [2021-10-13 07:19:56,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:19:56,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754515943] [2021-10-13 07:19:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:56,707 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:19:56,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:19:56,708 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:19:56,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-10-13 07:19:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:57,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:19:57,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:57,513 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 [2021-10-13 07:19:57,569 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:19:57,570 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 17 treesize of output 17 [2021-10-13 07:19:57,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 07:19:57,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-10-13 07:19:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:57,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:57,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:19:57,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754515943] [2021-10-13 07:19:57,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754515943] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:19:57,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1535349185] [2021-10-13 07:19:57,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:57,963 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:19:57,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:19:57,971 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:19:57,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-10-13 07:19:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:59,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:19:59,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:19:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:19:59,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:19:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:19:59,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1535349185] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:59,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 07:19:59,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 9] total 12 [2021-10-13 07:19:59,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848477437] [2021-10-13 07:19:59,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:19:59,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:19:59,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:19:59,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:19:59,355 INFO L87 Difference]: Start difference. First operand 214 states and 288 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-10-13 07:19:59,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:59,625 INFO L93 Difference]: Finished difference Result 223 states and 284 transitions. [2021-10-13 07:19:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:19:59,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 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 33 [2021-10-13 07:19:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:59,627 INFO L225 Difference]: With dead ends: 223 [2021-10-13 07:19:59,627 INFO L226 Difference]: Without dead ends: 223 [2021-10-13 07:19:59,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:19:59,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-10-13 07:19:59,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 196. [2021-10-13 07:19:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 181 states have (on average 1.3867403314917126) internal successors, (251), 195 states have internal predecessors, (251), 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) [2021-10-13 07:19:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 251 transitions. [2021-10-13 07:19:59,633 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 251 transitions. Word has length 33 [2021-10-13 07:19:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:59,633 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 251 transitions. [2021-10-13 07:19:59,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-10-13 07:19:59,633 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 251 transitions. [2021-10-13 07:19:59,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 07:19:59,634 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:59,634 INFO L512 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] [2021-10-13 07:19:59,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2021-10-13 07:19:59,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-10-13 07:20:00,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:20:00,065 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:20:00,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:20:00,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2004836725, now seen corresponding path program 1 times [2021-10-13 07:20:00,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:20:00,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015146466] [2021-10-13 07:20:00,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:20:00,066 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:20:00,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:20:00,067 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:20:00,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-13 07:20:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:20:00,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:20:00,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:20:00,923 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 [2021-10-13 07:20:00,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-10-13 07:20:01,075 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 17 [2021-10-13 07:20:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:20:01,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:20:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:20:01,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:20:01,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015146466] [2021-10-13 07:20:01,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015146466] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:20:01,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:20:01,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-10-13 07:20:01,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033230819] [2021-10-13 07:20:01,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:20:01,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:20:01,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:20:01,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:20:01,326 INFO L87 Difference]: Start difference. First operand 196 states and 251 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 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) [2021-10-13 07:20:02,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:20:02,468 INFO L93 Difference]: Finished difference Result 227 states and 273 transitions. [2021-10-13 07:20:02,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 07:20:02,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 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 33 [2021-10-13 07:20:02,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:20:02,470 INFO L225 Difference]: With dead ends: 227 [2021-10-13 07:20:02,470 INFO L226 Difference]: Without dead ends: 227 [2021-10-13 07:20:02,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 324.7ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:20:02,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-10-13 07:20:02,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 198. [2021-10-13 07:20:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 183 states have (on average 1.3934426229508197) internal successors, (255), 197 states have internal predecessors, (255), 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) [2021-10-13 07:20:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 255 transitions. [2021-10-13 07:20:02,475 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 255 transitions. Word has length 33 [2021-10-13 07:20:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:20:02,476 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 255 transitions. [2021-10-13 07:20:02,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 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) [2021-10-13 07:20:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 255 transitions. [2021-10-13 07:20:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 07:20:02,480 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:20:02,480 INFO L512 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] [2021-10-13 07:20:02,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-10-13 07:20:02,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:20:02,694 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:20:02,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:20:02,694 INFO L82 PathProgramCache]: Analyzing trace with hash -2004836724, now seen corresponding path program 1 times [2021-10-13 07:20:02,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:20:02,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27958062] [2021-10-13 07:20:02,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:20:02,695 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:20:02,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:20:02,696 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:20:02,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-13 07:20:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:20:03,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:20:03,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:20:03,576 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 [2021-10-13 07:20:03,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:20:03,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 07:20:03,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-10-13 07:20:03,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-10-13 07:20:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:20:03,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:20:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:20:04,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:20:04,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27958062] [2021-10-13 07:20:04,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27958062] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:20:04,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:20:04,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-10-13 07:20:04,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424662054] [2021-10-13 07:20:04,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:20:04,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:20:04,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:20:04,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:20:04,755 INFO L87 Difference]: Start difference. First operand 198 states and 255 transitions. Second operand has 14 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 14 states have internal predecessors, (56), 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) [2021-10-13 07:20:08,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:20:08,349 INFO L93 Difference]: Finished difference Result 227 states and 274 transitions. [2021-10-13 07:20:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 07:20:08,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 14 states have internal predecessors, (56), 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 33 [2021-10-13 07:20:08,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:20:08,352 INFO L225 Difference]: With dead ends: 227 [2021-10-13 07:20:08,352 INFO L226 Difference]: Without dead ends: 227 [2021-10-13 07:20:08,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1237.0ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-10-13 07:20:08,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-10-13 07:20:08,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 198. [2021-10-13 07:20:08,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 183 states have (on average 1.3879781420765027) internal successors, (254), 197 states have internal predecessors, (254), 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) [2021-10-13 07:20:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 254 transitions. [2021-10-13 07:20:08,357 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 254 transitions. Word has length 33 [2021-10-13 07:20:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:20:08,358 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 254 transitions. [2021-10-13 07:20:08,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 14 states have internal predecessors, (56), 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) [2021-10-13 07:20:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 254 transitions. [2021-10-13 07:20:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 07:20:08,359 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:20:08,359 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:20:08,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-10-13 07:20:08,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:20:08,581 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 07:20:08,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:20:08,581 INFO L82 PathProgramCache]: Analyzing trace with hash -161860525, now seen corresponding path program 1 times [2021-10-13 07:20:08,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:20:08,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435219655] [2021-10-13 07:20:08,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:20:08,582 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:20:08,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:20:08,582 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:20:08,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-13 07:20:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:20:09,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 07:20:09,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:20:09,549 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 [2021-10-13 07:20:09,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:20:09,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:09,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:20:09,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:09,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:09,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:09,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:20:09,895 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:20:09,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-13 07:20:10,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:10,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 07:20:10,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:10,165 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 07:20:10,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2021-10-13 07:20:10,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:10,341 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-10-13 07:20:10,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 54 [2021-10-13 07:20:10,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:10,571 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-10-13 07:20:10,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 66 [2021-10-13 07:20:10,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:20:10,816 INFO L354 Elim1Store]: treesize reduction 188, result has 15.7 percent of original size [2021-10-13 07:20:10,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 69 [2021-10-13 07:20:11,186 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-13 07:20:11,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 74 [2021-10-13 07:20:11,527 INFO L354 Elim1Store]: treesize reduction 384, result has 10.9 percent of original size [2021-10-13 07:20:11,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 102 treesize of output 81 [2021-10-13 07:20:12,056 INFO L354 Elim1Store]: treesize reduction 228, result has 0.4 percent of original size [2021-10-13 07:20:12,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 97 treesize of output 38 [2021-10-13 07:20:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:20:12,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:20:12,447 INFO L354 Elim1Store]: treesize reduction 5, result has 88.1 percent of original size [2021-10-13 07:20:12,447 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 56 treesize of output 55 [2021-10-13 07:20:12,608 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:20:12,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-10-13 07:21:07,346 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0.offset_67 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_74 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_74)))) (= c_ULTIMATE.start_main_~x~0.base (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~x~0.base_74 (store (store (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv12 32) v_ULTIMATE.start_main_~x~0.offset_67) (_ bv0 32)) v_ULTIMATE.start_main_~x~0.offset_67 v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_67) v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv8 32) v_ULTIMATE.start_main_~x~0.offset_67) v_DerPreprocessor_9)))) (store .cse1 c_ULTIMATE.start_main_~x~0.base (store (select .cse1 c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv12 32) c_ULTIMATE.start_main_~x~0.offset) v_ULTIMATE.start_main_~x~0.base_74))))) (store .cse0 v_ULTIMATE.start_main_~x~0.base_74 (store (select .cse0 v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv16 32) v_ULTIMATE.start_main_~x~0.offset_67) c_ULTIMATE.start_main_~x~0.base))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset)))) is different from false [2021-10-13 07:21:07,557 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:21:07,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 217 [2021-10-13 07:21:09,702 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0.offset_67 (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_74 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_74)))) (= c_ULTIMATE.start_main_~x~0.base (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~x~0.offset) v_DerPreprocessor_10)))) (store .cse2 v_ULTIMATE.start_main_~x~0.base_74 (store (store (store (store (select .cse2 v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv12 32) v_ULTIMATE.start_main_~x~0.offset_67) (_ bv0 32)) v_ULTIMATE.start_main_~x~0.offset_67 v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_67) v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv8 32) v_ULTIMATE.start_main_~x~0.offset_67) v_DerPreprocessor_9))))) (store .cse1 c_ULTIMATE.start_main_~x~0.base (store (select .cse1 c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv12 32) c_ULTIMATE.start_main_~x~0.offset) v_ULTIMATE.start_main_~x~0.base_74))))) (store .cse0 v_ULTIMATE.start_main_~x~0.base_74 (store (select .cse0 v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv16 32) v_ULTIMATE.start_main_~x~0.offset_67) c_ULTIMATE.start_main_~x~0.base))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset)))) is different from false [2021-10-13 07:21:11,939 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0.offset_67 (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_74 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_74)))) (= (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~x~0.offset) v_DerPreprocessor_10)))) (store .cse2 v_ULTIMATE.start_main_~x~0.base_74 (store (store (store (store (select .cse2 v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv12 32) v_ULTIMATE.start_main_~x~0.offset_67) (_ bv0 32)) v_ULTIMATE.start_main_~x~0.offset_67 v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_67) v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv8 32) v_ULTIMATE.start_main_~x~0.offset_67) v_DerPreprocessor_9))))) (store .cse1 c_ULTIMATE.start_main_~x~0.base (store (select .cse1 c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv12 32) c_ULTIMATE.start_main_~x~0.offset) v_ULTIMATE.start_main_~x~0.base_74))))) (store .cse0 v_ULTIMATE.start_main_~x~0.base_74 (store (select .cse0 v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv16 32) v_ULTIMATE.start_main_~x~0.offset_67) c_ULTIMATE.start_main_~x~0.base))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) c_ULTIMATE.start_main_~x~0.base))) is different from false [2021-10-13 07:21:15,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:21:15,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435219655] [2021-10-13 07:21:15,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:21:15,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [564845170] [2021-10-13 07:21:15,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:15,048 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:21:15,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:21:15,049 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:21:15,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-10-13 07:21:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:16,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 07:21:16,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:21:16,496 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 [2021-10-13 07:21:16,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:21:16,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:21:16,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:16,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:21:16,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:16,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:21:16,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:16,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:16,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:16,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:21:16,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:16,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:16,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:16,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:21:17,336 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:21:17,336 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 16 treesize of output 16 [2021-10-13 07:21:17,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:17,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 07:21:17,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:17,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 07:21:17,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:17,862 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 07:21:17,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2021-10-13 07:21:17,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:17,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:17,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-10-13 07:21:18,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:18,225 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-10-13 07:21:18,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 54 [2021-10-13 07:21:18,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:18,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:18,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:18,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:18,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2021-10-13 07:21:18,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:18,638 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-10-13 07:21:18,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 66 [2021-10-13 07:21:18,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:18,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:18,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:18,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:18,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:18,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:18,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:18,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2021-10-13 07:21:19,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,144 INFO L354 Elim1Store]: treesize reduction 188, result has 15.7 percent of original size [2021-10-13 07:21:19,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 69 [2021-10-13 07:21:19,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 69 [2021-10-13 07:21:19,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,865 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-13 07:21:19,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 78 [2021-10-13 07:21:19,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:19,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 78 [2021-10-13 07:21:20,757 INFO L354 Elim1Store]: treesize reduction 564, result has 9.5 percent of original size [2021-10-13 07:21:20,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 235 treesize of output 186 [2021-10-13 07:21:20,979 INFO L354 Elim1Store]: treesize reduction 396, result has 12.2 percent of original size [2021-10-13 07:21:20,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 27 case distinctions, treesize of input 210 treesize of output 182 [2021-10-13 07:21:22,221 INFO L354 Elim1Store]: treesize reduction 305, result has 1.0 percent of original size [2021-10-13 07:21:22,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 199 treesize of output 130 [2021-10-13 07:21:22,261 INFO L354 Elim1Store]: treesize reduction 283, result has 1.0 percent of original size [2021-10-13 07:21:22,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 35 [2021-10-13 07:21:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:22,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:21:24,533 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:21:24,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-10-13 07:21:24,538 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:21:24,540 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 155 [2021-10-13 07:23:32,486 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0.base_75 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_75)))))) (and (forall ((v_subst_2 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32))) (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~x~0.base_75 (store (store (store (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_main_~x~0.base_75) (bvadd (_ bv12 32) v_subst_2) (_ bv0 32)) v_subst_2 v_subst_2) (bvadd (_ bv4 32) v_subst_2) v_subst_2) (bvadd (_ bv8 32) v_subst_2) v_DerPreprocessor_11)))) (store .cse1 c_ULTIMATE.start_main_~x~0.base (store (select .cse1 c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv12 32) c_ULTIMATE.start_main_~x~0.offset) v_subst_2))))) (store .cse0 v_ULTIMATE.start_main_~x~0.base_75 (store (select .cse0 v_ULTIMATE.start_main_~x~0.base_75) (bvadd (_ bv16 32) v_subst_2) c_ULTIMATE.start_main_~x~0.offset))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) c_ULTIMATE.start_main_~x~0.offset)) (forall ((v_subst_1 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (= c_ULTIMATE.start_main_~x~0.base (select (select (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~x~0.base_75 (store (store (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~x~0.base_75) (bvadd (_ bv12 32) v_subst_1) (_ bv0 32)) v_subst_1 v_ULTIMATE.start_main_~x~0.base_75) (bvadd (_ bv4 32) v_subst_1) v_ULTIMATE.start_main_~x~0.base_75) (bvadd (_ bv8 32) v_subst_1) v_DerPreprocessor_12)))) (store .cse3 c_ULTIMATE.start_main_~x~0.base (store (select .cse3 c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv12 32) c_ULTIMATE.start_main_~x~0.offset) v_ULTIMATE.start_main_~x~0.base_75))))) (store .cse2 v_ULTIMATE.start_main_~x~0.base_75 (store (select .cse2 v_ULTIMATE.start_main_~x~0.base_75) (bvadd (_ bv16 32) v_subst_1) c_ULTIMATE.start_main_~x~0.base))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset)))))) is different from false [2021-10-13 07:23:32,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:32,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 369 [2021-10-13 07:23:32,975 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:32,983 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 429 [2021-10-13 07:23:33,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_subst_2 [2021-10-13 07:23:33,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495911585] [2021-10-13 07:23:33,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:33,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:23:33,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:23:33,391 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:23:33,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-13 07:23:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:34,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 07:23:34,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:34,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:23:34,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:23:34,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:23:34,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:23:34,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:23:34,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:23:34,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:23:35,102 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:23:35,103 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 16 treesize of output 16 [2021-10-13 07:23:35,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:23:35,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 07:23:35,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:23:35,274 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 07:23:35,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2021-10-13 07:23:35,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:23:35,364 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-10-13 07:23:35,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 54 [2021-10-13 07:23:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:23:35,507 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-10-13 07:23:35,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 66 [2021-10-13 07:23:35,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:23:35,689 INFO L354 Elim1Store]: treesize reduction 188, result has 15.7 percent of original size [2021-10-13 07:23:35,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 69 [2021-10-13 07:23:36,084 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-13 07:23:36,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 74 [2021-10-13 07:23:36,324 INFO L354 Elim1Store]: treesize reduction 384, result has 10.9 percent of original size [2021-10-13 07:23:36,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 102 treesize of output 81 [2021-10-13 07:23:36,697 INFO L354 Elim1Store]: treesize reduction 228, result has 0.4 percent of original size [2021-10-13 07:23:36,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 97 treesize of output 38 [2021-10-13 07:23:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:36,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:36,847 INFO L354 Elim1Store]: treesize reduction 5, result has 88.1 percent of original size [2021-10-13 07:23:36,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 55 [2021-10-13 07:23:36,903 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:36,904 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-10-13 07:24:10,644 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0.offset_70 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_74 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32))) (or (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~x~0.base_74 (store (store (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv12 32) v_ULTIMATE.start_main_~x~0.offset_70) (_ bv0 32)) v_ULTIMATE.start_main_~x~0.offset_70 v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_70) v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv8 32) v_ULTIMATE.start_main_~x~0.offset_70) v_DerPreprocessor_9)))) (store .cse1 c_ULTIMATE.start_main_~x~0.base (store (select .cse1 c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv12 32) c_ULTIMATE.start_main_~x~0.offset) v_ULTIMATE.start_main_~x~0.base_74))))) (store .cse0 v_ULTIMATE.start_main_~x~0.base_74 (store (select .cse0 v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv16 32) v_ULTIMATE.start_main_~x~0.offset_70) c_ULTIMATE.start_main_~x~0.base))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) c_ULTIMATE.start_main_~x~0.base) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_74)))))) is different from false [2021-10-13 07:24:10,867 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:24:10,868 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 217 [2021-10-13 07:24:13,058 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0.offset_70 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_74 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_74)))) (= (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~x~0.offset) v_DerPreprocessor_16)))) (store .cse2 v_ULTIMATE.start_main_~x~0.base_74 (store (store (store (store (select .cse2 v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv12 32) v_ULTIMATE.start_main_~x~0.offset_70) (_ bv0 32)) v_ULTIMATE.start_main_~x~0.offset_70 v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_70) v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv8 32) v_ULTIMATE.start_main_~x~0.offset_70) v_DerPreprocessor_9))))) (store .cse1 c_ULTIMATE.start_main_~x~0.base (store (select .cse1 c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv12 32) c_ULTIMATE.start_main_~x~0.offset) v_ULTIMATE.start_main_~x~0.base_74))))) (store .cse0 v_ULTIMATE.start_main_~x~0.base_74 (store (select .cse0 v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv16 32) v_ULTIMATE.start_main_~x~0.offset_70) c_ULTIMATE.start_main_~x~0.base))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) c_ULTIMATE.start_main_~x~0.base))) is different from false [2021-10-13 07:24:15,266 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0.offset_70 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_74 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_74)))) (= c_ULTIMATE.start_main_~x~0.base (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~x~0.offset) v_DerPreprocessor_16)))) (store .cse2 v_ULTIMATE.start_main_~x~0.base_74 (store (store (store (store (select .cse2 v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv12 32) v_ULTIMATE.start_main_~x~0.offset_70) (_ bv0 32)) v_ULTIMATE.start_main_~x~0.offset_70 v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_70) v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv8 32) v_ULTIMATE.start_main_~x~0.offset_70) v_DerPreprocessor_9))))) (store .cse1 c_ULTIMATE.start_main_~x~0.base (store (select .cse1 c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv12 32) c_ULTIMATE.start_main_~x~0.offset) v_ULTIMATE.start_main_~x~0.base_74))))) (store .cse0 v_ULTIMATE.start_main_~x~0.base_74 (store (select .cse0 v_ULTIMATE.start_main_~x~0.base_74) (bvadd (_ bv16 32) v_ULTIMATE.start_main_~x~0.offset_70) c_ULTIMATE.start_main_~x~0.base))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset)))) is different from false [2021-10-13 07:24:39,446 WARN L207 SmtUtils]: Spent 24.15 s on a formula simplification. DAG size of input: 587 DAG size of output: 583 [2021-10-13 07:24:39,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:24:39,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:39,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 07:24:39,450 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 07:24:39,450 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 07:24:39,457 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION [2021-10-13 07:24:39,459 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 07:24:39,459 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 07:24:39,459 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 07:24:39,459 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 07:24:39,459 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 07:24:39,460 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 07:24:39,460 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 07:24:39,460 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 07:24:39,460 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 07:24:39,460 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 07:24:39,461 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 07:24:39,461 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 07:24:39,461 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 07:24:39,461 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 07:24:39,461 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 07:24:39,461 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 07:24:39,462 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-13 07:24:39,462 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-13 07:24:39,462 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-13 07:24:39,462 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-13 07:24:39,462 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION [2021-10-13 07:24:39,463 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION [2021-10-13 07:24:39,463 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION [2021-10-13 07:24:39,463 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION [2021-10-13 07:24:39,463 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION [2021-10-13 07:24:39,463 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION [2021-10-13 07:24:39,463 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION [2021-10-13 07:24:39,464 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION [2021-10-13 07:24:39,464 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION [2021-10-13 07:24:39,464 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION [2021-10-13 07:24:39,464 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION [2021-10-13 07:24:39,464 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION [2021-10-13 07:24:39,464 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION [2021-10-13 07:24:39,465 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATION [2021-10-13 07:24:39,465 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATION [2021-10-13 07:24:39,465 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:24:39,465 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:24:39,465 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:24:39,466 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:24:39,466 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:24:39,466 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:24:39,466 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:24:39,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:39,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:39,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:40,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:24:40,089 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:24:40,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:24:40 BoogieIcfgContainer [2021-10-13 07:24:40,104 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:24:40,105 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:24:40,105 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:24:40,105 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:24:40,105 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:41" (3/4) ... [2021-10-13 07:24:40,107 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:24:40,107 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:24:40,108 INFO L168 Benchmark]: Toolchain (without parser) took 540555.74 ms. Allocated memory was 58.7 MB in the beginning and 547.4 MB in the end (delta: 488.6 MB). Free memory was 35.6 MB in the beginning and 153.2 MB in the end (delta: -117.7 MB). Peak memory consumption was 371.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:40,108 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 58.7 MB. Free memory is still 40.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:24:40,109 INFO L168 Benchmark]: CACSL2BoogieTranslator took 667.73 ms. Allocated memory is still 58.7 MB. Free memory was 35.4 MB in the beginning and 34.9 MB in the end (delta: 586.0 kB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:40,109 INFO L168 Benchmark]: Boogie Procedure Inliner took 128.36 ms. Allocated memory is still 58.7 MB. Free memory was 34.7 MB in the beginning and 32.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:40,109 INFO L168 Benchmark]: Boogie Preprocessor took 91.78 ms. Allocated memory is still 58.7 MB. Free memory was 32.6 MB in the beginning and 30.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:40,110 INFO L168 Benchmark]: RCFGBuilder took 1063.85 ms. Allocated memory was 58.7 MB in the beginning and 83.9 MB in the end (delta: 25.2 MB). Free memory was 30.8 MB in the beginning and 52.0 MB in the end (delta: -21.2 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:40,110 INFO L168 Benchmark]: TraceAbstraction took 538592.83 ms. Allocated memory was 83.9 MB in the beginning and 547.4 MB in the end (delta: 463.5 MB). Free memory was 51.3 MB in the beginning and 154.3 MB in the end (delta: -102.9 MB). Peak memory consumption was 399.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:40,111 INFO L168 Benchmark]: Witness Printer took 2.63 ms. Allocated memory is still 547.4 MB. Free memory was 154.3 MB in the beginning and 153.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:24:40,112 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 58.7 MB. Free memory is still 40.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 667.73 ms. Allocated memory is still 58.7 MB. Free memory was 35.4 MB in the beginning and 34.9 MB in the end (delta: 586.0 kB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 128.36 ms. Allocated memory is still 58.7 MB. Free memory was 34.7 MB in the beginning and 32.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 91.78 ms. Allocated memory is still 58.7 MB. Free memory was 32.6 MB in the beginning and 30.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1063.85 ms. Allocated memory was 58.7 MB in the beginning and 83.9 MB in the end (delta: 25.2 MB). Free memory was 30.8 MB in the beginning and 52.0 MB in the end (delta: -21.2 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 538592.83 ms. Allocated memory was 83.9 MB in the beginning and 547.4 MB in the end (delta: 463.5 MB). Free memory was 51.3 MB in the beginning and 154.3 MB in the end (delta: -102.9 MB). Peak memory consumption was 399.6 MB. Max. memory is 16.1 GB. * Witness Printer took 2.63 ms. Allocated memory is still 547.4 MB. Free memory was 154.3 MB in the beginning and 153.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L535] struct T2* first = ((void *)0); [L536] struct T2* last = ((void *)0); [L537] int c1 = 0; [L538] int c2 = 0; [L539] COND TRUE c1 < 5 && __VERIFIER_nondet_int() [L540] c1++ [L541] struct T2* x = malloc(sizeof(struct T2)); [L542] COND FALSE !(!x) [L544] x->next = ((void *)0) [L545] x->prev = ((void *)0) [L546] x->head.next = &x->head [L547] x->head.prev = &x->head [L548] x->head.data = c1 * 2 [L549] struct T* y = ((void *)0); [L550] COND FALSE !(c2 < 3 && __VERIFIER_nondet_int()) [L562] c2 = 0 [L563] COND TRUE !first [L564] first = x [L565] last = x [L539] COND TRUE c1 < 5 && __VERIFIER_nondet_int() [L540] c1++ [L541] struct T2* x = malloc(sizeof(struct T2)); [L542] COND FALSE !(!x) [L544] x->next = ((void *)0) [L545] x->prev = ((void *)0) [L546] x->head.next = &x->head [L547] x->head.prev = &x->head [L548] x->head.data = c1 * 2 [L549] struct T* y = ((void *)0); [L550] COND FALSE !(c2 < 3 && __VERIFIER_nondet_int()) [L562] c2 = 0 [L563] COND FALSE !(!first) [L567] last->next = x [L568] x->prev = last [L569] last = x [L539] COND FALSE !(c1 < 5 && __VERIFIER_nondet_int()) [L572] COND TRUE c1 > 0 [L573] c1-- [L574] struct T2* x = first; [L575] EXPR first->next [L575] first = first->next [L576] EXPR x->head.next [L576] struct T* y = x->head.next; [L577] COND TRUE y != &x->head [L578] struct T* z = y; [L579] y->next - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 575]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 575]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 584]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 584]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 584]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 90 locations, 43 error locations. Started 1 CEGAR loops. OverallTime: 538498.5ms, OverallIterations: 28, TraceHistogramMax: 2, EmptinessCheckTime: 49.7ms, AutomataDifference: 89335.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1433 SDtfs, 4575 SDslu, 4222 SDs, 0 SdLazy, 5500 SolverSat, 369 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 39523.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1858 GetRequests, 1497 SyntacticMatches, 48 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 163074.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=229occurred in iteration=16, InterpolantAutomatonStates: 240, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 246.8ms AutomataMinimizationTime, 27 MinimizatonAttempts, 1368 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 471.9ms SsaConstructionTime, 3386.9ms SatisfiabilityAnalysisTime, 148213.7ms InterpolantComputationTime, 911 NumberOfCodeBlocks, 911 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 1738 ConstructedInterpolants, 276 QuantifiedInterpolants, 21145 SizeOfPredicates, 195 NumberOfNonLiveVariables, 4805 ConjunctsInSsa, 307 ConjunctsInUnsatCore, 84 InterpolantComputations, 40 PerfectInterpolantSequences, 83/276 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:24:40,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7a6934-33da-4075-98c5-1f661514763a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...