./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 417a96bf424eb15cdf3ae2ce282b015c547ba383 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 417a96bf424eb15cdf3ae2ce282b015c547ba383 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:19:52,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:19:52,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:19:52,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:19:52,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:19:52,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:19:52,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:19:52,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:19:52,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:19:52,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:19:52,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:19:52,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:19:52,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:19:52,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:19:52,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:19:52,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:19:52,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:19:52,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:19:52,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:19:52,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:19:52,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:19:52,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:19:52,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:19:52,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:19:52,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:19:52,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:19:52,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:19:52,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:19:52,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:19:52,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:19:52,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:19:52,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:19:52,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:19:52,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:19:52,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:19:52,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:19:52,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:19:52,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:19:52,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:19:52,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:19:52,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:19:52,492 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:19:52,546 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:19:52,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:19:52,548 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:19:52,548 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:19:52,549 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:19:52,549 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:19:52,549 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:19:52,549 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:19:52,556 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:19:52,556 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:19:52,557 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:19:52,558 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:19:52,558 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:19:52,558 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:19:52,558 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:19:52,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:19:52,560 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:19:52,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:19:52,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:19:52,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:19:52,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:19:52,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:19:52,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:19:52,561 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:19:52,562 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:19:52,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:19:52,562 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:19:52,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:19:52,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:19:52,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:19:52,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:19:52,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:19:52,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:19:52,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:19:52,573 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:19:52,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:19:52,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:19:52,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:19:52,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:19:52,574 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_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 417a96bf424eb15cdf3ae2ce282b015c547ba383 [2021-10-16 02:19:52,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:19:52,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:19:52,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:19:52,929 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:19:52,930 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:19:52,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/verifythis/duplets.c [2021-10-16 02:19:53,001 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/data/4aff2c81b/0e0383e4e7b84630afac2ef3a942a3e9/FLAG8e62c097d [2021-10-16 02:19:53,590 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:19:53,592 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/sv-benchmarks/c/verifythis/duplets.c [2021-10-16 02:19:53,622 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/data/4aff2c81b/0e0383e4e7b84630afac2ef3a942a3e9/FLAG8e62c097d [2021-10-16 02:19:53,903 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/data/4aff2c81b/0e0383e4e7b84630afac2ef3a942a3e9 [2021-10-16 02:19:53,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:19:53,910 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:19:53,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:19:53,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:19:53,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:19:53,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:19:53" (1/1) ... [2021-10-16 02:19:53,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74f01167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:53, skipping insertion in model container [2021-10-16 02:19:53,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:19:53" (1/1) ... [2021-10-16 02:19:53,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:19:53,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:19:54,085 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/sv-benchmarks/c/verifythis/duplets.c[485,498] [2021-10-16 02:19:54,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:19:54,122 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:19:54,134 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/sv-benchmarks/c/verifythis/duplets.c[485,498] [2021-10-16 02:19:54,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:19:54,161 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:19:54,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:54 WrapperNode [2021-10-16 02:19:54,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:19:54,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:19:54,164 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:19:54,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:19:54,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:54" (1/1) ... [2021-10-16 02:19:54,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:54" (1/1) ... [2021-10-16 02:19:54,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:19:54,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:19:54,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:19:54,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:19:54,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:54" (1/1) ... [2021-10-16 02:19:54,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:54" (1/1) ... [2021-10-16 02:19:54,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:54" (1/1) ... [2021-10-16 02:19:54,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:54" (1/1) ... [2021-10-16 02:19:54,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:54" (1/1) ... [2021-10-16 02:19:54,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:54" (1/1) ... [2021-10-16 02:19:54,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:54" (1/1) ... [2021-10-16 02:19:54,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:19:54,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:19:54,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:19:54,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:19:54,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:54" (1/1) ... [2021-10-16 02:19:54,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:19:54,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:19:54,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:19:54,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:19:54,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:19:54,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:19:54,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 02:19:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:19:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:19:54,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:19:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:19:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:19:55,343 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:19:55,344 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-16 02:19:55,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:19:55 BoogieIcfgContainer [2021-10-16 02:19:55,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:19:55,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:19:55,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:19:55,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:19:55,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:19:53" (1/3) ... [2021-10-16 02:19:55,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6208e497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:19:55, skipping insertion in model container [2021-10-16 02:19:55,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:54" (2/3) ... [2021-10-16 02:19:55,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6208e497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:19:55, skipping insertion in model container [2021-10-16 02:19:55,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:19:55" (3/3) ... [2021-10-16 02:19:55,365 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.c [2021-10-16 02:19:55,372 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:19:55,373 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-10-16 02:19:55,442 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:19:55,453 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:19:55,454 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-16 02:19:55,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.65) internal successors, (33), 25 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) [2021-10-16 02:19:55,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:19:55,489 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:19:55,490 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:19:55,491 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 02:19:55,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:19:55,507 INFO L82 PathProgramCache]: Analyzing trace with hash 174671679, now seen corresponding path program 1 times [2021-10-16 02:19:55,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:19:55,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690232082] [2021-10-16 02:19:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:19:55,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:19:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:19:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:19:55,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:19:55,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690232082] [2021-10-16 02:19:55,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690232082] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:19:55,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:19:55,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:19:55,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777777547] [2021-10-16 02:19:55,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:19:55,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:19:55,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:19:55,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:19:55,873 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.65) internal successors, (33), 25 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) 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) [2021-10-16 02:19:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:19:55,922 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2021-10-16 02:19:55,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:19:55,926 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 [2021-10-16 02:19:55,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:19:55,936 INFO L225 Difference]: With dead ends: 73 [2021-10-16 02:19:55,936 INFO L226 Difference]: Without dead ends: 47 [2021-10-16 02:19:55,941 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 [2021-10-16 02:19:55,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-16 02:19:55,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 25. [2021-10-16 02:19:55,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:19:55,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-10-16 02:19:55,987 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 5 [2021-10-16 02:19:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:19:55,987 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-10-16 02:19:55,988 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) [2021-10-16 02:19:55,988 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-10-16 02:19:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:19:55,989 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:19:55,990 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:19:55,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:19:55,990 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 02:19:55,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:19:55,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1342165999, now seen corresponding path program 1 times [2021-10-16 02:19:55,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:19:55,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548211821] [2021-10-16 02:19:55,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:19:55,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:19:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:19:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:19:56,127 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:19:56,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548211821] [2021-10-16 02:19:56,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548211821] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:19:56,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:19:56,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:19:56,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261822954] [2021-10-16 02:19:56,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:19:56,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:19:56,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:19:56,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:19:56,134 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:19:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:19:56,190 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-10-16 02:19:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:19:56,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-10-16 02:19:56,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:19:56,193 INFO L225 Difference]: With dead ends: 45 [2021-10-16 02:19:56,193 INFO L226 Difference]: Without dead ends: 43 [2021-10-16 02:19:56,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:19:56,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-16 02:19:56,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2021-10-16 02:19:56,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:19:56,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-10-16 02:19:56,200 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 7 [2021-10-16 02:19:56,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:19:56,201 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-10-16 02:19:56,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:19:56,202 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-10-16 02:19:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:19:56,202 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:19:56,203 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:19:56,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:19:56,203 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 02:19:56,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:19:56,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1442233968, now seen corresponding path program 1 times [2021-10-16 02:19:56,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:19:56,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327869100] [2021-10-16 02:19:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:19:56,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:19:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:19:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:19:56,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:19:56,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327869100] [2021-10-16 02:19:56,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327869100] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:19:56,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:19:56,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:19:56,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643549565] [2021-10-16 02:19:56,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:19:56,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:19:56,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:19:56,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:19:56,375 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:19:56,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:19:56,451 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2021-10-16 02:19:56,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:19:56,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-10-16 02:19:56,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:19:56,456 INFO L225 Difference]: With dead ends: 73 [2021-10-16 02:19:56,456 INFO L226 Difference]: Without dead ends: 48 [2021-10-16 02:19:56,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:19:56,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-16 02:19:56,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 28. [2021-10-16 02:19:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 27 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) [2021-10-16 02:19:56,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-16 02:19:56,469 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 7 [2021-10-16 02:19:56,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:19:56,469 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-16 02:19:56,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:19:56,470 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-16 02:19:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:19:56,470 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:19:56,470 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:19:56,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:19:56,471 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 02:19:56,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:19:56,472 INFO L82 PathProgramCache]: Analyzing trace with hash -675326368, now seen corresponding path program 1 times [2021-10-16 02:19:56,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:19:56,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942494385] [2021-10-16 02:19:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:19:56,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:19:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:19:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:19:56,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:19:56,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942494385] [2021-10-16 02:19:56,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942494385] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:19:56,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262336771] [2021-10-16 02:19:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:19:56,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:19:56,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:19:56,582 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:19:56,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:19:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:19:56,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:19:56,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:19:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:19:56,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:19:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:19:56,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262336771] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:19:56,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1327442470] [2021-10-16 02:19:56,872 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-16 02:19:56,873 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:19:56,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:19:56,890 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:19:56,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:19:56,978 INFO L180 QuantifierPusher]: treesize reduction 18, result has 95.7 percent of original size [2021-10-16 02:19:56,989 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:19:56,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:19:56,994 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-16 02:19:56,996 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:19:57,001 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:19:57,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-10-16 02:19:57,004 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:19:57,005 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:19:57,006 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-10-16 02:19:57,037 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 402 [2021-10-16 02:19:57,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:19:57,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:19:57,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:19:57,121 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:19:57,122 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:19:57,123 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:19:57,123 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:19:57,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:19:57,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:19:57,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:19:57,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:19:57,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:19:57,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:19:57,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:19:57,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:19:57,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:19:57,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:19:57,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:19:57,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:19:57,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:19:57,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:19:57,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:19:57,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:19:57,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:19:57,526 INFO L354 Elim1Store]: treesize reduction 244, result has 7.9 percent of original size [2021-10-16 02:19:57,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 case distinctions, treesize of input 95 treesize of output 94 [2021-10-16 02:19:57,552 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:19:57,568 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-10-16 02:19:57,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:19:57,572 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-10-16 02:19:57,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-16 02:19:57,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:19:57,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:19:57,689 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:19:57,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 346 [2021-10-16 02:19:57,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:19:57,706 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:776, output treesize:346 [2021-10-16 02:19:57,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:19:57,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:19:57,934 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_54| 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) [2021-10-16 02:19:57,938 INFO L168 Benchmark]: Toolchain (without parser) took 4027.10 ms. Allocated memory was 117.4 MB in the beginning and 159.4 MB in the end (delta: 41.9 MB). Free memory was 95.2 MB in the beginning and 113.2 MB in the end (delta: -17.9 MB). Peak memory consumption was 55.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:19:57,939 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 83.9 MB. Free memory was 58.3 MB in the beginning and 58.3 MB in the end (delta: 41.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:19:57,940 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.00 ms. Allocated memory is still 117.4 MB. Free memory was 95.0 MB in the beginning and 84.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:19:57,940 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.08 ms. Allocated memory is still 117.4 MB. Free memory was 84.7 MB in the beginning and 82.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:19:57,941 INFO L168 Benchmark]: Boogie Preprocessor took 48.98 ms. Allocated memory is still 117.4 MB. Free memory was 82.7 MB in the beginning and 81.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:19:57,942 INFO L168 Benchmark]: RCFGBuilder took 1075.14 ms. Allocated memory is still 117.4 MB. Free memory was 81.1 MB in the beginning and 80.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:19:57,950 INFO L168 Benchmark]: TraceAbstraction took 2584.27 ms. Allocated memory was 117.4 MB in the beginning and 159.4 MB in the end (delta: 41.9 MB). Free memory was 79.4 MB in the beginning and 113.2 MB in the end (delta: -33.7 MB). Peak memory consumption was 42.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:19:57,954 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 83.9 MB. Free memory was 58.3 MB in the beginning and 58.3 MB in the end (delta: 41.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 250.00 ms. Allocated memory is still 117.4 MB. Free memory was 95.0 MB in the beginning and 84.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.08 ms. Allocated memory is still 117.4 MB. Free memory was 84.7 MB in the beginning and 82.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.98 ms. Allocated memory is still 117.4 MB. Free memory was 82.7 MB in the beginning and 81.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1075.14 ms. Allocated memory is still 117.4 MB. Free memory was 81.1 MB in the beginning and 80.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2584.27 ms. Allocated memory was 117.4 MB in the beginning and 159.4 MB in the end (delta: 41.9 MB). Free memory was 79.4 MB in the beginning and 113.2 MB in the end (delta: -33.7 MB). Peak memory consumption was 42.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_54| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_54|: 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. [2021-10-16 02:19:58,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:20:00,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:20:00,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:20:00,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:20:00,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:20:00,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:20:00,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:20:00,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:20:00,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:20:00,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:20:00,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:20:00,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:20:00,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:20:00,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:20:00,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:20:00,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:20:00,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:20:00,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:20:00,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:20:00,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:20:00,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:20:00,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:20:00,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:20:00,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:20:00,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:20:00,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:20:00,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:20:00,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:20:00,737 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:20:00,738 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:20:00,738 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:20:00,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:20:00,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:20:00,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:20:00,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:20:00,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:20:00,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:20:00,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:20:00,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:20:00,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:20:00,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:20:00,749 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:20:00,784 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:20:00,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:20:00,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:20:00,786 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:20:00,786 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:20:00,787 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:20:00,787 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:20:00,787 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:20:00,787 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:20:00,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:20:00,788 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:20:00,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:20:00,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:20:00,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:20:00,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:20:00,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:20:00,790 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:20:00,790 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:20:00,790 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:20:00,791 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:20:00,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:20:00,791 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:20:00,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:20:00,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:20:00,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:20:00,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:20:00,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:20:00,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:20:00,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:20:00,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:20:00,793 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:20:00,793 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:20:00,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:20:00,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:20:00,794 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:20:00,794 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_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 417a96bf424eb15cdf3ae2ce282b015c547ba383 [2021-10-16 02:20:01,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:20:01,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:20:01,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:20:01,291 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:20:01,292 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:20:01,295 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/verifythis/duplets.c [2021-10-16 02:20:01,393 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/data/34d7642cb/c51462e548e14e38b83e5021ef7c795f/FLAG0170034f6 [2021-10-16 02:20:01,988 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:20:01,988 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/sv-benchmarks/c/verifythis/duplets.c [2021-10-16 02:20:01,997 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/data/34d7642cb/c51462e548e14e38b83e5021ef7c795f/FLAG0170034f6 [2021-10-16 02:20:02,345 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/data/34d7642cb/c51462e548e14e38b83e5021ef7c795f [2021-10-16 02:20:02,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:20:02,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:20:02,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:20:02,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:20:02,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:20:02,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:20:02" (1/1) ... [2021-10-16 02:20:02,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@98c8347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:02, skipping insertion in model container [2021-10-16 02:20:02,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:20:02" (1/1) ... [2021-10-16 02:20:02,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:20:02,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:20:02,510 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/sv-benchmarks/c/verifythis/duplets.c[485,498] [2021-10-16 02:20:02,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:20:02,549 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:20:02,576 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/sv-benchmarks/c/verifythis/duplets.c[485,498] [2021-10-16 02:20:02,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:20:02,636 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:20:02,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:02 WrapperNode [2021-10-16 02:20:02,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:20:02,639 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:20:02,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:20:02,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:20:02,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:02" (1/1) ... [2021-10-16 02:20:02,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:02" (1/1) ... [2021-10-16 02:20:02,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:20:02,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:20:02,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:20:02,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:20:02,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:02" (1/1) ... [2021-10-16 02:20:02,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:02" (1/1) ... [2021-10-16 02:20:02,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:02" (1/1) ... [2021-10-16 02:20:02,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:02" (1/1) ... [2021-10-16 02:20:02,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:02" (1/1) ... [2021-10-16 02:20:02,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:02" (1/1) ... [2021-10-16 02:20:02,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:02" (1/1) ... [2021-10-16 02:20:02,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:20:02,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:20:02,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:20:02,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:20:02,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:02" (1/1) ... [2021-10-16 02:20:02,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:20:02,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:20:02,764 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:20:02,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:20:02,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:20:02,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:20:02,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:20:02,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:20:02,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:20:02,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:20:02,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:20:02,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:20:03,298 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:20:03,299 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-16 02:20:03,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:20:03 BoogieIcfgContainer [2021-10-16 02:20:03,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:20:03,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:20:03,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:20:03,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:20:03,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:20:02" (1/3) ... [2021-10-16 02:20:03,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db2f8dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:20:03, skipping insertion in model container [2021-10-16 02:20:03,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:20:02" (2/3) ... [2021-10-16 02:20:03,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db2f8dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:20:03, skipping insertion in model container [2021-10-16 02:20:03,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:20:03" (3/3) ... [2021-10-16 02:20:03,310 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.c [2021-10-16 02:20:03,315 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:20:03,316 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-10-16 02:20:03,364 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:20:03,371 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:20:03,372 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-16 02:20:03,387 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 40 states have (on average 1.525) internal successors, (61), 45 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) [2021-10-16 02:20:03,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 02:20:03,392 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:03,393 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:03,394 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 02:20:03,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:03,400 INFO L82 PathProgramCache]: Analyzing trace with hash 655320983, now seen corresponding path program 1 times [2021-10-16 02:20:03,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:03,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483969937] [2021-10-16 02:20:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:03,414 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:03,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:03,417 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:03,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:20:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:03,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:20:03,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:03,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:03,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:03,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483969937] [2021-10-16 02:20:03,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483969937] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:03,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:03,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:20:03,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951871815] [2021-10-16 02:20:03,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:20:03,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:03,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:20:03,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:20:03,784 INFO L87 Difference]: Start difference. First operand has 46 states, 40 states have (on average 1.525) internal successors, (61), 45 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) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 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) [2021-10-16 02:20:03,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:03,803 INFO L93 Difference]: Finished difference Result 89 states and 118 transitions. [2021-10-16 02:20:03,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:20:03,805 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 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 [2021-10-16 02:20:03,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:03,814 INFO L225 Difference]: With dead ends: 89 [2021-10-16 02:20:03,814 INFO L226 Difference]: Without dead ends: 42 [2021-10-16 02:20:03,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:20:03,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-16 02:20:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-16 02:20:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:03,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-10-16 02:20:03,853 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 17 [2021-10-16 02:20:03,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:03,853 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-10-16 02:20:03,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 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) [2021-10-16 02:20:03,854 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-10-16 02:20:03,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 02:20:03,855 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:03,855 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:03,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:04,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:04,068 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 02:20:04,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:04,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1826916331, now seen corresponding path program 1 times [2021-10-16 02:20:04,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:04,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80887605] [2021-10-16 02:20:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:04,081 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:04,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:04,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:04,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:20:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:04,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-16 02:20:04,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:05,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:06,067 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:06,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80887605] [2021-10-16 02:20:06,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80887605] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:06,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:06,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 9] imperfect sequences [] total 18 [2021-10-16 02:20:06,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983669832] [2021-10-16 02:20:06,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-16 02:20:06,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:06,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-16 02:20:06,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-16 02:20:06,081 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:07,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:07,550 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2021-10-16 02:20:07,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 02:20:07,552 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-16 02:20:07,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:07,558 INFO L225 Difference]: With dead ends: 121 [2021-10-16 02:20:07,559 INFO L226 Difference]: Without dead ends: 96 [2021-10-16 02:20:07,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1731.5ms TimeCoverageRelationStatistics Valid=209, Invalid=441, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:20:07,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-16 02:20:07,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 48. [2021-10-16 02:20:07,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.255813953488372) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-10-16 02:20:07,592 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 17 [2021-10-16 02:20:07,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:07,593 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-10-16 02:20:07,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:07,593 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-10-16 02:20:07,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:20:07,594 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:07,594 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:07,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:07,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:07,807 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 02:20:07,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:07,808 INFO L82 PathProgramCache]: Analyzing trace with hash -756845843, now seen corresponding path program 1 times [2021-10-16 02:20:07,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:07,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305962174] [2021-10-16 02:20:07,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:07,810 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:07,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:07,813 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:07,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:20:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:07,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:20:07,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:07,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:08,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:08,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305962174] [2021-10-16 02:20:08,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305962174] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:08,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:08,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:20:08,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713518692] [2021-10-16 02:20:08,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:20:08,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:08,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:20:08,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:20:08,037 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:08,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:08,114 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2021-10-16 02:20:08,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:20:08,114 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2021-10-16 02:20:08,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:08,115 INFO L225 Difference]: With dead ends: 72 [2021-10-16 02:20:08,115 INFO L226 Difference]: Without dead ends: 70 [2021-10-16 02:20:08,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:20:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-16 02:20:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2021-10-16 02:20:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 49 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) [2021-10-16 02:20:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-10-16 02:20:08,125 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 18 [2021-10-16 02:20:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:08,125 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-10-16 02:20:08,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-10-16 02:20:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:20:08,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:08,127 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] [2021-10-16 02:20:08,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-16 02:20:08,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:08,348 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 02:20:08,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:08,349 INFO L82 PathProgramCache]: Analyzing trace with hash 69607633, now seen corresponding path program 1 times [2021-10-16 02:20:08,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:08,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403578153] [2021-10-16 02:20:08,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:08,349 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:08,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:08,350 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:08,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:20:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:08,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:20:08,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:08,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-10-16 02:20:08,679 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 02:20:08,679 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 1 case distinctions, treesize of input 32 treesize of output 19 [2021-10-16 02:20:08,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-10-16 02:20:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:08,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:08,798 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 70 treesize of output 66 [2021-10-16 02:20:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:09,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:09,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403578153] [2021-10-16 02:20:09,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403578153] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:09,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:09,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-16 02:20:09,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005000414] [2021-10-16 02:20:09,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:20:09,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:09,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:20:09,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:20:09,028 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:09,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:09,296 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2021-10-16 02:20:09,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:20:09,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:20:09,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:09,298 INFO L225 Difference]: With dead ends: 116 [2021-10-16 02:20:09,298 INFO L226 Difference]: Without dead ends: 98 [2021-10-16 02:20:09,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:20:09,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-16 02:20:09,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2021-10-16 02:20:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.25) internal successors, (65), 56 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) [2021-10-16 02:20:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2021-10-16 02:20:09,309 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 22 [2021-10-16 02:20:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:09,310 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2021-10-16 02:20:09,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:09,310 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2021-10-16 02:20:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:20:09,311 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:09,311 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] [2021-10-16 02:20:09,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-16 02:20:09,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:09,524 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 02:20:09,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:09,524 INFO L82 PathProgramCache]: Analyzing trace with hash 69548051, now seen corresponding path program 1 times [2021-10-16 02:20:09,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:09,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21148025] [2021-10-16 02:20:09,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:09,525 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:09,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:09,527 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:09,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:20:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:09,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-16 02:20:09,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:09,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-10-16 02:20:10,126 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 02:20:10,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 32 treesize of output 19 [2021-10-16 02:20:10,357 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:20:10,358 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 46 treesize of output 30 [2021-10-16 02:20:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:10,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:10,502 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 70 treesize of output 66 [2021-10-16 02:20:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:11,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:11,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21148025] [2021-10-16 02:20:11,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21148025] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:11,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:11,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 8] imperfect sequences [] total 15 [2021-10-16 02:20:11,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236000358] [2021-10-16 02:20:11,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-16 02:20:11,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:11,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-16 02:20:11,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:20:11,072 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:14,692 INFO L93 Difference]: Finished difference Result 148 states and 163 transitions. [2021-10-16 02:20:14,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-16 02:20:14,706 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:20:14,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:14,707 INFO L225 Difference]: With dead ends: 148 [2021-10-16 02:20:14,707 INFO L226 Difference]: Without dead ends: 146 [2021-10-16 02:20:14,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 3300.9ms TimeCoverageRelationStatistics Valid=438, Invalid=1044, Unknown=0, NotChecked=0, Total=1482 [2021-10-16 02:20:14,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-16 02:20:14,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 65. [2021-10-16 02:20:14,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.25) internal successors, (75), 64 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) [2021-10-16 02:20:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-10-16 02:20:14,724 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 22 [2021-10-16 02:20:14,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:14,725 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-10-16 02:20:14,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-10-16 02:20:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 02:20:14,726 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:14,726 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:14,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:14,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:14,939 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 02:20:14,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:14,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1712571403, now seen corresponding path program 1 times [2021-10-16 02:20:14,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:14,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306137308] [2021-10-16 02:20:14,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:14,940 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:14,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:14,941 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:14,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:20:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:15,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 02:20:15,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:16,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:20:16,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:20:16,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:16,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306137308] [2021-10-16 02:20:16,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306137308] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:16,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:16,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 10] imperfect sequences [] total 20 [2021-10-16 02:20:16,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406437622] [2021-10-16 02:20:16,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-16 02:20:16,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:16,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-16 02:20:16,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:20:16,799 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:19,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:19,145 INFO L93 Difference]: Finished difference Result 177 states and 198 transitions. [2021-10-16 02:20:19,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 02:20:19,146 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-16 02:20:19,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:19,149 INFO L225 Difference]: With dead ends: 177 [2021-10-16 02:20:19,149 INFO L226 Difference]: Without dead ends: 128 [2021-10-16 02:20:19,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2502.9ms TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2021-10-16 02:20:19,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-16 02:20:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 66. [2021-10-16 02:20:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 65 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) [2021-10-16 02:20:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-10-16 02:20:19,185 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 23 [2021-10-16 02:20:19,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:19,185 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-10-16 02:20:19,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:19,186 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-10-16 02:20:19,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 02:20:19,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:19,189 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] [2021-10-16 02:20:19,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:19,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:19,404 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 02:20:19,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:19,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2028181769, now seen corresponding path program 1 times [2021-10-16 02:20:19,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:19,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663002705] [2021-10-16 02:20:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:19,406 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:19,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:19,409 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:19,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:20:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:19,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:20:19,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:19,886 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-16 02:20:19,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 27 treesize of output 23 [2021-10-16 02:20:19,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-10-16 02:20:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:19,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:20,063 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 158 treesize of output 150 [2021-10-16 02:20:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:20,521 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:20,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663002705] [2021-10-16 02:20:20,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663002705] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:20,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:20,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-16 02:20:20,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437110650] [2021-10-16 02:20:20,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:20:20,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:20,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:20:20,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:20:20,527 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:20,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:20,977 INFO L93 Difference]: Finished difference Result 206 states and 220 transitions. [2021-10-16 02:20:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 02:20:20,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-16 02:20:20,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:20,979 INFO L225 Difference]: With dead ends: 206 [2021-10-16 02:20:20,979 INFO L226 Difference]: Without dead ends: 194 [2021-10-16 02:20:20,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-10-16 02:20:20,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-10-16 02:20:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 78. [2021-10-16 02:20:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 77 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:20,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2021-10-16 02:20:20,994 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 26 [2021-10-16 02:20:20,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:20,994 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2021-10-16 02:20:20,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:20,995 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2021-10-16 02:20:20,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 02:20:20,996 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:20,996 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] [2021-10-16 02:20:21,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-16 02:20:21,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:21,208 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 02:20:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:21,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2028241351, now seen corresponding path program 1 times [2021-10-16 02:20:21,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:21,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801127509] [2021-10-16 02:20:21,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:21,209 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:21,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:21,214 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:21,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:20:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:21,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 02:20:21,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:21,793 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-16 02:20:21,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 27 treesize of output 23 [2021-10-16 02:20:21,937 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 35 treesize of output 23 [2021-10-16 02:20:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:21,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:22,066 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 158 treesize of output 150 [2021-10-16 02:20:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:20:22,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:22,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801127509] [2021-10-16 02:20:22,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801127509] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:22,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:22,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 8] imperfect sequences [] total 15 [2021-10-16 02:20:22,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793498917] [2021-10-16 02:20:22,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-16 02:20:22,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:22,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-16 02:20:22,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:20:22,538 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:25,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:20:25,014 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2021-10-16 02:20:25,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-16 02:20:25,015 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 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 [2021-10-16 02:20:25,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:20:25,017 INFO L225 Difference]: With dead ends: 173 [2021-10-16 02:20:25,017 INFO L226 Difference]: Without dead ends: 171 [2021-10-16 02:20:25,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2142.2ms TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2021-10-16 02:20:25,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-16 02:20:25,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 82. [2021-10-16 02:20:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 81 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) [2021-10-16 02:20:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2021-10-16 02:20:25,030 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 26 [2021-10-16 02:20:25,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:20:25,030 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2021-10-16 02:20:25,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:20:25,031 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2021-10-16 02:20:25,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 02:20:25,032 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:20:25,032 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:20:25,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:25,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:25,247 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-16 02:20:25,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:25,247 INFO L82 PathProgramCache]: Analyzing trace with hash -760559199, now seen corresponding path program 1 times [2021-10-16 02:20:25,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:25,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857302369] [2021-10-16 02:20:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:25,248 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:25,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:25,249 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:25,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:20:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:25,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-16 02:20:25,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:26,415 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-16 02:20:26,415 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 1 case distinctions, treesize of input 39 treesize of output 39 [2021-10-16 02:20:26,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:20:26,970 INFO L354 Elim1Store]: treesize reduction 12, result has 78.9 percent of original size [2021-10-16 02:20:26,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 70 [2021-10-16 02:20:27,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:27,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857302369] [2021-10-16 02:20:27,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-16 02:20:27,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2072985505] [2021-10-16 02:20:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:27,046 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:20:27,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:20:27,054 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:20:27,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-16 02:20:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:27,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-16 02:20:27,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:28,352 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-16 02:20:28,352 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 1 case distinctions, treesize of input 39 treesize of output 39 [2021-10-16 02:20:28,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:20:28,955 INFO L354 Elim1Store]: treesize reduction 12, result has 78.9 percent of original size [2021-10-16 02:20:28,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 70 [2021-10-16 02:20:29,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-16 02:20:29,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850472799] [2021-10-16 02:20:29,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:29,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:20:29,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:20:29,025 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:20:29,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-16 02:20:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:29,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-16 02:20:29,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:29,806 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-16 02:20:29,807 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 1 case distinctions, treesize of input 39 treesize of output 39 [2021-10-16 02:20:30,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:20:30,269 INFO L354 Elim1Store]: treesize reduction 12, result has 78.9 percent of original size [2021-10-16 02:20:30,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 70 [2021-10-16 02:20:30,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-16 02:20:30,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:30,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-16 02:20:30,354 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-16 02:20:30,354 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-16 02:20:30,360 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:20:30,365 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:20:30,365 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:20:30,366 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:20:30,366 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:20:30,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:30,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:30,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-10-16 02:20:30,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53316073-5df1-4521-9698-bfec32979150/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:30,975 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:20:30,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:20:30 BoogieIcfgContainer [2021-10-16 02:20:30,990 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:20:30,991 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:20:30,991 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:20:30,991 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:20:30,992 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:20:03" (3/4) ... [2021-10-16 02:20:31,000 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 02:20:31,000 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:20:31,001 INFO L168 Benchmark]: Toolchain (without parser) took 28649.41 ms. Allocated memory was 54.5 MB in the beginning and 86.0 MB in the end (delta: 31.5 MB). Free memory was 32.6 MB in the beginning and 49.4 MB in the end (delta: -16.8 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:20:31,001 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 54.5 MB. Free memory is still 36.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:20:31,002 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.08 ms. Allocated memory is still 54.5 MB. Free memory was 32.4 MB in the beginning and 37.0 MB in the end (delta: -4.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:20:31,003 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.08 ms. Allocated memory is still 54.5 MB. Free memory was 37.0 MB in the beginning and 35.0 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:20:31,003 INFO L168 Benchmark]: Boogie Preprocessor took 33.59 ms. Allocated memory is still 54.5 MB. Free memory was 35.0 MB in the beginning and 33.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:20:31,004 INFO L168 Benchmark]: RCFGBuilder took 569.32 ms. Allocated memory was 54.5 MB in the beginning and 71.3 MB in the end (delta: 16.8 MB). Free memory was 33.4 MB in the beginning and 49.0 MB in the end (delta: -15.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:20:31,004 INFO L168 Benchmark]: TraceAbstraction took 27687.36 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 48.5 MB in the beginning and 49.4 MB in the end (delta: -868.1 kB). Peak memory consumption was 43.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:20:31,005 INFO L168 Benchmark]: Witness Printer took 8.88 ms. Allocated memory is still 86.0 MB. Free memory is still 49.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:20:31,007 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 54.5 MB. Free memory is still 36.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 284.08 ms. Allocated memory is still 54.5 MB. Free memory was 32.4 MB in the beginning and 37.0 MB in the end (delta: -4.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.08 ms. Allocated memory is still 54.5 MB. Free memory was 37.0 MB in the beginning and 35.0 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.59 ms. Allocated memory is still 54.5 MB. Free memory was 35.0 MB in the beginning and 33.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 569.32 ms. Allocated memory was 54.5 MB in the beginning and 71.3 MB in the end (delta: 16.8 MB). Free memory was 33.4 MB in the beginning and 49.0 MB in the end (delta: -15.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 27687.36 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 48.5 MB in the beginning and 49.4 MB in the end (delta: -868.1 kB). Peak memory consumption was 43.6 MB. Max. memory is 16.1 GB. * Witness Printer took 8.88 ms. Allocated memory is still 86.0 MB. Free memory is still 49.4 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: 10]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L49] int n = __VERIFIER_nondet_int(); [L16] COND FALSE !(!cond) [L52] int *a = calloc(n, sizeof(int)); [L20] int i = __VERIFIER_nondet_int(); [L21] int j = __VERIFIER_nondet_int(); [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L27] int x = __VERIFIER_nondet_int(); [L29] a[i] = x [L30] a[j] = x [L56] int i,j; [L34] int i,j; [L36] i=0 [L36] COND TRUE i