./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan --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 e042943c5d2d2df9c6856b10a20aadc6a7d57626 ............................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan --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 e042943c5d2d2df9c6856b10a20aadc6a7d57626 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 05:26:52,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 05:26:52,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 05:26:52,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 05:26:52,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 05:26:52,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 05:26:52,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 05:26:52,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 05:26:52,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 05:26:52,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 05:26:52,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 05:26:52,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 05:26:52,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 05:26:52,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 05:26:52,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 05:26:52,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 05:26:52,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 05:26:52,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 05:26:52,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 05:26:52,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 05:26:52,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 05:26:52,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 05:26:52,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 05:26:52,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 05:26:52,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 05:26:52,160 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 05:26:52,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 05:26:52,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 05:26:52,161 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 05:26:52,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 05:26:52,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 05:26:52,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 05:26:52,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 05:26:52,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 05:26:52,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 05:26:52,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 05:26:52,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 05:26:52,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 05:26:52,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 05:26:52,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 05:26:52,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 05:26:52,168 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 05:26:52,184 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 05:26:52,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 05:26:52,185 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 05:26:52,185 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 05:26:52,185 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 05:26:52,186 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 05:26:52,186 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 05:26:52,186 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 05:26:52,186 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 05:26:52,186 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 05:26:52,186 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 05:26:52,186 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 05:26:52,186 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 05:26:52,187 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 05:26:52,187 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 05:26:52,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 05:26:52,187 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 05:26:52,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 05:26:52,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 05:26:52,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 05:26:52,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 05:26:52,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 05:26:52,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 05:26:52,188 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 05:26:52,188 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 05:26:52,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 05:26:52,188 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 05:26:52,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 05:26:52,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 05:26:52,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 05:26:52,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:26:52,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 05:26:52,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 05:26:52,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 05:26:52,189 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 05:26:52,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 05:26:52,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 05:26:52,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 05:26:52,190 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 05:26:52,190 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-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e042943c5d2d2df9c6856b10a20aadc6a7d57626 [2020-12-09 05:26:52,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 05:26:52,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 05:26:52,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 05:26:52,391 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 05:26:52,392 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 05:26:52,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2020-12-09 05:26:52,435 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/data/8c080aced/dd89337a53be40a58d033e53324865e9/FLAG66a607da1 [2020-12-09 05:26:52,808 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 05:26:52,809 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2020-12-09 05:26:52,814 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/data/8c080aced/dd89337a53be40a58d033e53324865e9/FLAG66a607da1 [2020-12-09 05:26:52,823 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/data/8c080aced/dd89337a53be40a58d033e53324865e9 [2020-12-09 05:26:52,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 05:26:52,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 05:26:52,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 05:26:52,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 05:26:52,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 05:26:52,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:26:52" (1/1) ... [2020-12-09 05:26:52,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e2f5c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:52, skipping insertion in model container [2020-12-09 05:26:52,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:26:52" (1/1) ... [2020-12-09 05:26:52,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 05:26:52,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 05:26:52,953 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c[597,610] [2020-12-09 05:26:52,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:26:52,976 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 05:26:52,984 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c[597,610] [2020-12-09 05:26:52,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:26:53,001 INFO L208 MainTranslator]: Completed translation [2020-12-09 05:26:53,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:53 WrapperNode [2020-12-09 05:26:53,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 05:26:53,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 05:26:53,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 05:26:53,003 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 05:26:53,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:53" (1/1) ... [2020-12-09 05:26:53,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:53" (1/1) ... [2020-12-09 05:26:53,034 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 05:26:53,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 05:26:53,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 05:26:53,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 05:26:53,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:53" (1/1) ... [2020-12-09 05:26:53,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:53" (1/1) ... [2020-12-09 05:26:53,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:53" (1/1) ... [2020-12-09 05:26:53,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:53" (1/1) ... [2020-12-09 05:26:53,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:53" (1/1) ... [2020-12-09 05:26:53,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:53" (1/1) ... [2020-12-09 05:26:53,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:53" (1/1) ... [2020-12-09 05:26:53,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 05:26:53,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 05:26:53,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 05:26:53,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 05:26:53,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:26:53,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 05:26:53,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 05:26:53,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 05:26:53,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 05:26:53,295 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 05:26:53,295 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 05:26:53,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:26:53 BoogieIcfgContainer [2020-12-09 05:26:53,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 05:26:53,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 05:26:53,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 05:26:53,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 05:26:53,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:26:52" (1/3) ... [2020-12-09 05:26:53,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45062ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:26:53, skipping insertion in model container [2020-12-09 05:26:53,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:53" (2/3) ... [2020-12-09 05:26:53,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45062ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:26:53, skipping insertion in model container [2020-12-09 05:26:53,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:26:53" (3/3) ... [2020-12-09 05:26:53,304 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound2.c [2020-12-09 05:26:53,317 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 05:26:53,320 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 05:26:53,335 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 05:26:53,360 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 05:26:53,360 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 05:26:53,360 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 05:26:53,360 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 05:26:53,360 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 05:26:53,361 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 05:26:53,361 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 05:26:53,361 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 05:26:53,373 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-09 05:26:53,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 05:26:53,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:26:53,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 05:26:53,377 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:26:53,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:26:53,383 INFO L82 PathProgramCache]: Analyzing trace with hash 78686072, now seen corresponding path program 1 times [2020-12-09 05:26:53,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:26:53,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303812131] [2020-12-09 05:26:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:26:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:26:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:26:53,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303812131] [2020-12-09 05:26:53,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:26:53,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:26:53,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684351668] [2020-12-09 05:26:53,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 05:26:53,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:26:53,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 05:26:53,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 05:26:53,527 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-09 05:26:53,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:26:53,537 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2020-12-09 05:26:53,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 05:26:53,538 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 05:26:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:26:53,544 INFO L225 Difference]: With dead ends: 25 [2020-12-09 05:26:53,544 INFO L226 Difference]: Without dead ends: 11 [2020-12-09 05:26:53,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 05:26:53,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-09 05:26:53,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-09 05:26:53,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 05:26:53,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-09 05:26:53,576 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2020-12-09 05:26:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:26:53,576 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-09 05:26:53,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 05:26:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-09 05:26:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 05:26:53,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:26:53,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 05:26:53,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 05:26:53,578 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:26:53,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:26:53,578 INFO L82 PathProgramCache]: Analyzing trace with hash 77796315, now seen corresponding path program 1 times [2020-12-09 05:26:53,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:26:53,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543436175] [2020-12-09 05:26:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:26:53,592 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 05:26:53,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713096307] [2020-12-09 05:26:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:26:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:26:53,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 05:26:53,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:26:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:26:53,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:26:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:26:53,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543436175] [2020-12-09 05:26:53,715 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:26:53,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713096307] [2020-12-09 05:26:53,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:26:53,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 05:26:53,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681160514] [2020-12-09 05:26:53,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 05:26:53,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:26:53,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 05:26:53,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 05:26:53,718 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2020-12-09 05:26:55,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:26:55,780 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-12-09 05:26:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 05:26:55,781 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 05:26:55,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:26:55,781 INFO L225 Difference]: With dead ends: 33 [2020-12-09 05:26:55,781 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 05:26:55,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 05:26:55,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 05:26:55,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2020-12-09 05:26:55,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 05:26:55,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-09 05:26:55,786 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 5 [2020-12-09 05:26:55,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:26:55,786 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-09 05:26:55,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 05:26:55,786 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-09 05:26:55,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 05:26:55,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:26:55,787 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:26:55,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 05:26:55,989 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:26:55,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:26:55,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1713128762, now seen corresponding path program 1 times [2020-12-09 05:26:55,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:26:55,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324532360] [2020-12-09 05:26:55,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:26:56,006 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 05:26:56,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407734182] [2020-12-09 05:26:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:26:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:26:56,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 05:26:56,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:26:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:26:56,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:26:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:26:56,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324532360] [2020-12-09 05:26:56,086 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:26:56,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407734182] [2020-12-09 05:26:56,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [210617180] [2020-12-09 05:26:56,100 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 05:26:56,101 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:26:56,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:26:56,108 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:26:56,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:26:56,566 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:26:57,043 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-09 05:26:57,144 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:26:57,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 05:26:57,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-12-09 05:26:57,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758895036] [2020-12-09 05:26:57,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 05:26:57,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:26:57,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 05:26:57,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-12-09 05:26:57,146 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-12-09 05:26:57,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:26:57,165 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-09 05:26:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 05:26:57,166 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 05:26:57,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:26:57,166 INFO L225 Difference]: With dead ends: 22 [2020-12-09 05:26:57,166 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 05:26:57,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-09 05:26:57,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 05:26:57,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-09 05:26:57,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 05:26:57,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-09 05:26:57,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 10 [2020-12-09 05:26:57,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:26:57,170 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-09 05:26:57,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 05:26:57,170 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-09 05:26:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 05:26:57,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:26:57,170 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 05:26:57,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:26:57,371 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:26:57,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:26:57,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1304111137, now seen corresponding path program 1 times [2020-12-09 05:26:57,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:26:57,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875795325] [2020-12-09 05:26:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:26:57,382 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 05:26:57,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212784252] [2020-12-09 05:26:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:26:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:26:57,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-09 05:26:57,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:26:57,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875795325] [2020-12-09 05:26:57,652 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:26:57,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212784252] [2020-12-09 05:26:57,652 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-09 05:26:57,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [935371867] [2020-12-09 05:26:57,654 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 05:26:57,654 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:26:57,654 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:26:57,654 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:26:57,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:26:57,843 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:26:57,968 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-12-09 05:26:58,573 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:26:58,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:26:58,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 05:26:58,573 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 05:26:58,573 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 05:26:58,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-09 05:26:58,788 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 05:26:58,789 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 05:26:58,814 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 05:26:58,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:26:58 BoogieIcfgContainer [2020-12-09 05:26:58,814 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 05:26:58,815 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 05:26:58,816 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 05:26:58,816 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 05:26:58,817 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:26:53" (3/4) ... [2020-12-09 05:26:58,822 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 05:26:58,822 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 05:26:58,824 INFO L168 Benchmark]: Toolchain (without parser) took 5996.89 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 58.4 MB in the beginning and 43.1 MB in the end (delta: 15.4 MB). Peak memory consumption was 34.8 MB. Max. memory is 16.1 GB. [2020-12-09 05:26:58,825 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 94.4 MB. Free memory was 74.7 MB in the beginning and 74.6 MB in the end (delta: 65.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:26:58,826 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.30 ms. Allocated memory is still 94.4 MB. Free memory was 58.2 MB in the beginning and 71.6 MB in the end (delta: -13.4 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:26:58,827 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.47 ms. Allocated memory is still 94.4 MB. Free memory was 71.6 MB in the beginning and 70.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:26:58,827 INFO L168 Benchmark]: Boogie Preprocessor took 19.83 ms. Allocated memory is still 94.4 MB. Free memory was 70.1 MB in the beginning and 69.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:26:58,828 INFO L168 Benchmark]: RCFGBuilder took 241.20 ms. Allocated memory is still 94.4 MB. Free memory was 69.0 MB in the beginning and 51.7 MB in the end (delta: 17.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-09 05:26:58,829 INFO L168 Benchmark]: TraceAbstraction took 5516.92 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 51.2 MB in the beginning and 44.1 MB in the end (delta: 7.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 16.1 GB. [2020-12-09 05:26:58,829 INFO L168 Benchmark]: Witness Printer took 6.71 ms. Allocated memory is still 113.2 MB. Free memory was 44.1 MB in the beginning and 43.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:26:58,833 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 94.4 MB. Free memory was 74.7 MB in the beginning and 74.6 MB in the end (delta: 65.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 175.30 ms. Allocated memory is still 94.4 MB. Free memory was 58.2 MB in the beginning and 71.6 MB in the end (delta: -13.4 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.47 ms. Allocated memory is still 94.4 MB. Free memory was 71.6 MB in the beginning and 70.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.83 ms. Allocated memory is still 94.4 MB. Free memory was 70.1 MB in the beginning and 69.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 241.20 ms. Allocated memory is still 94.4 MB. Free memory was 69.0 MB in the beginning and 51.7 MB in the end (delta: 17.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5516.92 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 51.2 MB in the beginning and 44.1 MB in the end (delta: 7.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 16.1 GB. * Witness Printer took 6.71 ms. Allocated memory is still 113.2 MB. Free memory was 44.1 MB in the beginning and 43.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 16]: 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: [L21] int counter = 0; [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 [L31] EXPR counter++ [L31] COND TRUE counter++<2 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) [L35] COND FALSE !(!(x <= X)) [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ [L45] x++ [L31] EXPR counter++ [L31] COND TRUE counter++<2 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) [L35] COND TRUE !(x <= X) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x [L14] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 5.4s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 30 SDslu, 48 SDs, 0 SdLazy, 30 SolverSat, 13 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 686 SizeOfPredicates, 9 NumberOfNonLiveVariables, 136 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 0/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 05:27:00,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 05:27:00,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 05:27:00,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 05:27:00,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 05:27:00,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 05:27:00,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 05:27:00,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 05:27:00,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 05:27:00,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 05:27:00,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 05:27:00,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 05:27:00,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 05:27:00,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 05:27:00,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 05:27:00,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 05:27:00,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 05:27:00,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 05:27:00,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 05:27:00,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 05:27:00,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 05:27:00,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 05:27:00,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 05:27:00,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 05:27:00,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 05:27:00,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 05:27:00,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 05:27:00,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 05:27:00,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 05:27:00,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 05:27:00,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 05:27:00,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 05:27:00,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 05:27:00,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 05:27:00,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 05:27:00,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 05:27:00,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 05:27:00,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 05:27:00,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 05:27:00,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 05:27:00,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 05:27:00,456 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 05:27:00,475 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 05:27:00,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 05:27:00,476 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 05:27:00,477 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 05:27:00,477 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 05:27:00,477 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 05:27:00,477 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 05:27:00,477 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 05:27:00,477 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 05:27:00,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 05:27:00,478 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 05:27:00,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 05:27:00,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 05:27:00,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 05:27:00,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 05:27:00,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 05:27:00,479 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 05:27:00,479 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 05:27:00,479 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 05:27:00,479 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 05:27:00,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 05:27:00,479 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 05:27:00,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 05:27:00,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 05:27:00,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 05:27:00,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 05:27:00,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:27:00,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 05:27:00,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 05:27:00,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 05:27:00,481 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 05:27:00,481 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 05:27:00,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 05:27:00,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 05:27:00,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 05:27:00,481 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-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e042943c5d2d2df9c6856b10a20aadc6a7d57626 [2020-12-09 05:27:00,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 05:27:00,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 05:27:00,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 05:27:00,734 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 05:27:00,734 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 05:27:00,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2020-12-09 05:27:00,775 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/data/06a30a068/2b4943066c9e4f32a34f92faa2fae920/FLAG4600d7800 [2020-12-09 05:27:01,150 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 05:27:01,151 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2020-12-09 05:27:01,157 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/data/06a30a068/2b4943066c9e4f32a34f92faa2fae920/FLAG4600d7800 [2020-12-09 05:27:01,169 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/data/06a30a068/2b4943066c9e4f32a34f92faa2fae920 [2020-12-09 05:27:01,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 05:27:01,173 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 05:27:01,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 05:27:01,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 05:27:01,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 05:27:01,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:27:01" (1/1) ... [2020-12-09 05:27:01,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f3881bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:01, skipping insertion in model container [2020-12-09 05:27:01,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:27:01" (1/1) ... [2020-12-09 05:27:01,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 05:27:01,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 05:27:01,306 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c[597,610] [2020-12-09 05:27:01,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:27:01,336 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 05:27:01,345 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c[597,610] [2020-12-09 05:27:01,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:27:01,368 INFO L208 MainTranslator]: Completed translation [2020-12-09 05:27:01,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:01 WrapperNode [2020-12-09 05:27:01,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 05:27:01,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 05:27:01,370 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 05:27:01,370 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 05:27:01,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:01" (1/1) ... [2020-12-09 05:27:01,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:01" (1/1) ... [2020-12-09 05:27:01,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 05:27:01,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 05:27:01,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 05:27:01,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 05:27:01,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:01" (1/1) ... [2020-12-09 05:27:01,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:01" (1/1) ... [2020-12-09 05:27:01,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:01" (1/1) ... [2020-12-09 05:27:01,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:01" (1/1) ... [2020-12-09 05:27:01,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:01" (1/1) ... [2020-12-09 05:27:01,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:01" (1/1) ... [2020-12-09 05:27:01,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:01" (1/1) ... [2020-12-09 05:27:01,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 05:27:01,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 05:27:01,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 05:27:01,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 05:27:01,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:27:01,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 05:27:01,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 05:27:01,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 05:27:01,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 05:27:01,979 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 05:27:01,979 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 05:27:01,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:27:01 BoogieIcfgContainer [2020-12-09 05:27:01,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 05:27:01,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 05:27:01,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 05:27:01,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 05:27:01,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:27:01" (1/3) ... [2020-12-09 05:27:01,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c0d6bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:27:01, skipping insertion in model container [2020-12-09 05:27:01,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:27:01" (2/3) ... [2020-12-09 05:27:01,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c0d6bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:27:01, skipping insertion in model container [2020-12-09 05:27:01,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:27:01" (3/3) ... [2020-12-09 05:27:01,986 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound2.c [2020-12-09 05:27:01,994 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 05:27:01,997 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 05:27:02,004 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 05:27:02,022 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 05:27:02,022 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 05:27:02,022 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 05:27:02,022 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 05:27:02,022 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 05:27:02,022 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 05:27:02,022 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 05:27:02,022 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 05:27:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-09 05:27:02,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 05:27:02,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:27:02,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 05:27:02,034 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:27:02,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:27:02,037 INFO L82 PathProgramCache]: Analyzing trace with hash 890461031, now seen corresponding path program 1 times [2020-12-09 05:27:02,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 05:27:02,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974239484] [2020-12-09 05:27:02,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 05:27:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:27:02,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 05:27:02,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:27:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:27:02,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 05:27:02,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974239484] [2020-12-09 05:27:02,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:27:02,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:27:02,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352477144] [2020-12-09 05:27:02,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 05:27:02,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 05:27:02,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 05:27:02,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 05:27:02,190 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-09 05:27:02,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:27:02,201 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-12-09 05:27:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 05:27:02,202 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-09 05:27:02,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:27:02,207 INFO L225 Difference]: With dead ends: 34 [2020-12-09 05:27:02,208 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 05:27:02,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 05:27:02,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 05:27:02,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 05:27:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 05:27:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-09 05:27:02,230 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2020-12-09 05:27:02,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:27:02,231 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-09 05:27:02,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 05:27:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-09 05:27:02,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 05:27:02,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:27:02,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 05:27:02,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 05:27:02,432 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:27:02,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:27:02,433 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-09 05:27:02,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 05:27:02,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675515454] [2020-12-09 05:27:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 05:27:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:27:02,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 05:27:02,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:27:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:27:02,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 05:27:02,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675515454] [2020-12-09 05:27:02,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:27:02,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:27:02,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249917769] [2020-12-09 05:27:02,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:27:02,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 05:27:02,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:27:02,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:27:02,671 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2020-12-09 05:27:03,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:27:03,820 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-12-09 05:27:03,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:27:03,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 05:27:03,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:27:03,822 INFO L225 Difference]: With dead ends: 30 [2020-12-09 05:27:03,822 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 05:27:03,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 05:27:03,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 05:27:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-12-09 05:27:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 05:27:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-09 05:27:03,826 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2020-12-09 05:27:03,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:27:03,827 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-09 05:27:03,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:27:03,827 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-09 05:27:03,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 05:27:03,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:27:03,827 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:27:04,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 05:27:04,029 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:27:04,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:27:04,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1545533000, now seen corresponding path program 1 times [2020-12-09 05:27:04,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 05:27:04,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383571987] [2020-12-09 05:27:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 05:27:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:27:11,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 05:27:11,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:27:12,905 WARN L197 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2020-12-09 05:27:13,194 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 05:27:13,199 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 05:27:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:27:13,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:27:16,499 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-09 05:27:19,382 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 05:27:22,836 WARN L197 SmtUtils]: Spent 588.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-09 05:27:27,000 WARN L197 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 05:27:30,850 WARN L197 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 05:27:30,863 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 05:27:30,863 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 05:27:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:27:30,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383571987] [2020-12-09 05:27:30,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [974541446] [2020-12-09 05:27:30,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt [2020-12-09 05:27:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:27:36,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 05:27:36,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:27:36,250 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 05:27:36,253 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 05:27:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:27:36,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:27:42,390 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 05:27:42,391 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 05:27:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:27:42,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4387125] [2020-12-09 05:27:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:30:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:30:23,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 05:30:23,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:30:28,915 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 05:30:33,999 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 05:30:34,013 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 05:30:34,016 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 05:30:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:30:34,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:30:37,438 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 05:30:37,439 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 05:30:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:30:37,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 05:30:37,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 16 [2020-12-09 05:30:37,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045603838] [2020-12-09 05:30:37,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 05:30:37,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 05:30:37,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 05:30:37,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=174, Unknown=4, NotChecked=0, Total=240 [2020-12-09 05:30:37,448 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 16 states. [2020-12-09 05:30:47,009 WARN L197 SmtUtils]: Spent 8.57 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-12-09 05:30:52,538 WARN L197 SmtUtils]: Spent 679.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-09 05:31:07,338 WARN L197 SmtUtils]: Spent 8.63 s on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-09 05:31:16,578 WARN L197 SmtUtils]: Spent 563.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-09 05:31:27,255 WARN L197 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-12-09 05:31:39,831 WARN L197 SmtUtils]: Spent 674.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-09 05:31:49,310 WARN L197 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-09 05:31:53,777 WARN L197 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 05:31:57,959 WARN L197 SmtUtils]: Spent 795.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 05:32:01,990 WARN L197 SmtUtils]: Spent 613.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-09 05:32:02,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:32:02,085 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-12-09 05:32:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-09 05:32:02,101 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-12-09 05:32:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:32:02,102 INFO L225 Difference]: With dead ends: 52 [2020-12-09 05:32:02,102 INFO L226 Difference]: Without dead ends: 50 [2020-12-09 05:32:02,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 85.7s TimeCoverageRelationStatistics Valid=171, Invalid=527, Unknown=4, NotChecked=0, Total=702 [2020-12-09 05:32:02,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-09 05:32:02,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 23. [2020-12-09 05:32:02,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 05:32:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-09 05:32:02,108 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-12-09 05:32:02,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:32:02,108 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-09 05:32:02,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 05:32:02,108 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-09 05:32:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 05:32:02,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:32:02,109 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:32:02,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 cvc4 --incremental --print-success --lang smt [2020-12-09 05:32:02,712 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:32:02,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:32:02,713 INFO L82 PathProgramCache]: Analyzing trace with hash -666919436, now seen corresponding path program 1 times [2020-12-09 05:32:02,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 05:32:02,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423139420] [2020-12-09 05:32:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 05:32:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:32:02,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 05:32:02,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:32:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:32:02,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:32:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:32:03,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423139420] [2020-12-09 05:32:03,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1937725240] [2020-12-09 05:32:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt [2020-12-09 05:32:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:32:03,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 05:32:03,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:32:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:32:03,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:32:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:32:03,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013815027] [2020-12-09 05:32:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:32:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:32:03,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 05:32:03,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:32:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:32:03,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:32:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:32:03,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 05:32:03,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2020-12-09 05:32:03,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008203659] [2020-12-09 05:32:03,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 05:32:03,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 05:32:03,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 05:32:03,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-09 05:32:03,577 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 8 states. [2020-12-09 05:32:04,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:32:04,026 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-12-09 05:32:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 05:32:04,027 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-09 05:32:04,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:32:04,027 INFO L225 Difference]: With dead ends: 30 [2020-12-09 05:32:04,028 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 05:32:04,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-09 05:32:04,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 05:32:04,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-09 05:32:04,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 05:32:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-12-09 05:32:04,033 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-12-09 05:32:04,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:32:04,033 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-12-09 05:32:04,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 05:32:04,033 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-12-09 05:32:04,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 05:32:04,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:32:04,034 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:32:04,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt [2020-12-09 05:32:04,636 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:32:04,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:32:04,638 INFO L82 PathProgramCache]: Analyzing trace with hash -919296115, now seen corresponding path program 1 times [2020-12-09 05:32:04,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 05:32:04,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114510271] [2020-12-09 05:32:04,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-09 05:32:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:32:04,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 05:32:04,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:32:07,775 WARN L197 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2020-12-09 05:32:07,977 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 05:32:07,980 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 05:32:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:32:08,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:32:11,640 WARN L197 SmtUtils]: Spent 653.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-09 05:32:14,610 WARN L197 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-09 05:32:18,419 WARN L197 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 25 [2020-12-09 05:32:18,427 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 05:32:18,427 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 05:32:28,846 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 29 [2020-12-09 05:32:35,246 WARN L197 SmtUtils]: Spent 2.62 s on a formula simplification that was a NOOP. DAG size: 33 [2020-12-09 05:32:42,329 WARN L197 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 37 [2020-12-09 05:32:44,688 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse9 ((_ sign_extend 32) c_ULTIMATE.start_main_~Y~0)) (.cse2 ((_ sign_extend 32) (_ bv2 32))) (.cse4 ((_ sign_extend 32) c_ULTIMATE.start_main_~X~0))) (let ((.cse5 (bvneg .cse4)) (.cse10 (bvmul .cse9 .cse2))) (let ((.cse1 (bvneg (bvadd c_ULTIMATE.start_main_~v~0 (bvmul .cse5 .cse2) .cse10))) (.cse3 (bvadd c_ULTIMATE.start_main_~y~0 (_ bv1 64))) (.cse6 (bvmul (_ bv2 64) .cse10)) (.cse7 (bvmul .cse9 .cse2 c_ULTIMATE.start_main_~x~0)) (.cse8 (bvadd c_ULTIMATE.start_main_~x~0 (_ bv1 64))) (.cse0 ((_ sign_extend 32) (_ bv0 32)))) (or (not (= .cse0 (bvadd .cse1 (bvneg (bvmul .cse2 (bvmul .cse3 .cse4))) .cse5 .cse6 .cse7))) (= .cse0 (bvadd .cse1 .cse2 (bvneg (bvmul .cse2 (bvmul .cse8 .cse3))) (bvmul .cse2 c_ULTIMATE.start_main_~y~0) .cse5 .cse6 .cse7)) (bvsle .cse8 .cse4) (bvslt c_ULTIMATE.start_main_~v~0 .cse0) (not (bvsle c_ULTIMATE.start_main_~x~0 .cse4)))))) is different from true [2020-12-09 05:32:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2020-12-09 05:32:44,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114510271] [2020-12-09 05:32:44,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [80955696] [2020-12-09 05:32:44,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt [2020-12-09 05:32:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:32:45,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 05:32:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:32:47,617 WARN L197 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2020-12-09 05:32:52,127 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 05:32:58,875 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-12-09 05:32:59,291 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 05:32:59,292 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 05:32:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:32:59,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:33:03,675 WARN L197 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 27 [2020-12-09 05:33:08,568 WARN L197 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-09 05:33:12,599 WARN L197 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-09 05:33:17,005 WARN L197 SmtUtils]: Spent 974.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-09 05:33:17,011 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 05:33:17,012 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 05:33:19,124 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse7 ((_ sign_extend 32) c_ULTIMATE.start_main_~Y~0)) (.cse3 ((_ sign_extend 32) (_ bv2 32))) (.cse4 ((_ sign_extend 32) c_ULTIMATE.start_main_~X~0))) (let ((.cse1 (bvneg .cse4)) (.cse2 (bvmul .cse7 .cse3)) (.cse5 (bvmul .cse7 .cse3 c_ULTIMATE.start_main_~x~0)) (.cse6 (bvadd c_ULTIMATE.start_main_~x~0 (_ bv1 64))) (.cse0 ((_ sign_extend 32) (_ bv0 32)))) (or (not (= .cse0 (bvadd .cse1 .cse2 (bvneg (bvmul .cse3 (bvmul c_ULTIMATE.start_main_~y~0 .cse4))) .cse5 (bvneg c_ULTIMATE.start_main_~v~0)))) (= .cse0 (bvadd (bvneg (bvadd c_ULTIMATE.start_main_~v~0 (bvmul .cse1 .cse3) .cse2)) .cse3 (bvneg (bvmul .cse3 (bvmul .cse6 (bvadd c_ULTIMATE.start_main_~y~0 (_ bv1 64))))) (bvmul .cse3 c_ULTIMATE.start_main_~y~0) .cse1 (bvmul (_ bv2 64) .cse2) .cse5)) (bvsle .cse6 .cse4) (bvslt c_ULTIMATE.start_main_~v~0 .cse0) (not (bvsle c_ULTIMATE.start_main_~x~0 .cse4))))) is different from true [2020-12-09 05:33:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-12-09 05:33:19,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325841443] [2020-12-09 05:33:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:33:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:33:20,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-09 05:33:20,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:33:36,363 WARN L197 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-12-09 05:33:43,327 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 05:33:43,331 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 05:33:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:33:43,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:33:43,353 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 05:33:43,353 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 05:33:45,730 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse9 ((_ sign_extend 32) c_ULTIMATE.start_main_~Y~0)) (.cse2 ((_ sign_extend 32) (_ bv2 32))) (.cse4 ((_ sign_extend 32) c_ULTIMATE.start_main_~X~0))) (let ((.cse5 (bvneg .cse4)) (.cse10 (bvmul .cse9 .cse2))) (let ((.cse1 (bvneg (bvadd c_ULTIMATE.start_main_~v~0 (bvmul .cse5 .cse2) .cse10))) (.cse3 (bvadd c_ULTIMATE.start_main_~y~0 (_ bv1 64))) (.cse6 (bvmul (_ bv2 64) .cse10)) (.cse7 (bvmul .cse9 .cse2 c_ULTIMATE.start_main_~x~0)) (.cse8 (bvadd c_ULTIMATE.start_main_~x~0 (_ bv1 64))) (.cse0 ((_ sign_extend 32) (_ bv0 32)))) (or (not (= .cse0 (bvadd .cse1 (bvneg (bvmul .cse2 (bvmul .cse3 .cse4))) .cse5 .cse6 .cse7))) (= .cse0 (bvadd .cse1 .cse2 (bvneg (bvmul .cse2 (bvmul .cse8 .cse3))) (bvmul .cse2 c_ULTIMATE.start_main_~y~0) .cse5 .cse6 .cse7)) (bvsle .cse8 .cse4) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (bvslt c_ULTIMATE.start_main_~v~0 .cse0) (not (bvsle c_ULTIMATE.start_main_~x~0 .cse4)))))) is different from true [2020-12-09 05:33:45,735 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 05:33:45,735 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 05:33:48,149 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse10 ((_ sign_extend 32) c_ULTIMATE.start_main_~Y~0)) (.cse2 ((_ sign_extend 32) (_ bv2 32))) (.cse4 ((_ sign_extend 32) c_ULTIMATE.start_main_~X~0))) (let ((.cse5 (bvneg .cse4)) (.cse8 (bvmul .cse10 .cse2))) (let ((.cse1 (bvneg (bvadd c_ULTIMATE.start_main_~v~0 (bvmul .cse5 .cse2) .cse8))) (.cse3 (bvadd c_ULTIMATE.start_main_~y~0 (_ bv1 64))) (.cse6 (bvmul (_ bv2 64) .cse8)) (.cse7 (bvmul .cse10 .cse2 c_ULTIMATE.start_main_~x~0)) (.cse9 (bvadd c_ULTIMATE.start_main_~x~0 (_ bv1 64))) (.cse0 ((_ sign_extend 32) (_ bv0 32)))) (or (not (= .cse0 (bvadd .cse1 (bvneg (bvmul .cse2 (bvmul .cse3 .cse4))) .cse5 .cse6 .cse7))) (not (= .cse0 (bvadd .cse5 (bvneg (bvmul .cse2 (bvmul c_ULTIMATE.start_main_~y~0 .cse4))) .cse8 .cse7 (bvneg c_ULTIMATE.start_main_~v~0)))) (= .cse0 (bvadd .cse1 .cse2 (bvneg (bvmul .cse2 (bvmul .cse9 .cse3))) (bvmul .cse2 c_ULTIMATE.start_main_~y~0) .cse5 .cse6 .cse7)) (bvsle .cse9 .cse4) (bvslt c_ULTIMATE.start_main_~v~0 .cse0) (not (bvsle c_ULTIMATE.start_main_~x~0 .cse4)))))) is different from true [2020-12-09 05:33:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2020-12-09 05:33:48,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 05:33:48,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9, 10, 10, 12] total 28 [2020-12-09 05:33:48,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073835856] [2020-12-09 05:33:48,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-09 05:33:48,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 05:33:48,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-09 05:33:48,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=419, Unknown=12, NotChecked=188, Total=756 [2020-12-09 05:33:48,171 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 28 states. [2020-12-09 05:33:59,065 WARN L197 SmtUtils]: Spent 8.54 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-09 05:34:07,864 WARN L197 SmtUtils]: Spent 6.23 s on a formula simplification that was a NOOP. DAG size: 50 [2020-12-09 05:34:21,298 WARN L197 SmtUtils]: Spent 8.69 s on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-09 05:34:37,219 WARN L197 SmtUtils]: Spent 1.54 s on a formula simplification that was a NOOP. DAG size: 28 [2020-12-09 05:34:52,619 WARN L197 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 27 [2020-12-09 05:34:53,230 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-12-09 05:35:06,847 WARN L197 SmtUtils]: Spent 12.74 s on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-12-09 05:35:15,607 WARN L197 SmtUtils]: Spent 2.99 s on a formula simplification that was a NOOP. DAG size: 43 [2020-12-09 05:35:39,521 WARN L197 SmtUtils]: Spent 7.92 s on a formula simplification that was a NOOP. DAG size: 56 [2020-12-09 05:35:49,376 WARN L197 SmtUtils]: Spent 2.49 s on a formula simplification that was a NOOP. DAG size: 44 [2020-12-09 05:36:18,837 WARN L197 SmtUtils]: Spent 2.32 s on a formula simplification that was a NOOP. DAG size: 43 [2020-12-09 05:36:28,694 WARN L197 SmtUtils]: Spent 2.80 s on a formula simplification that was a NOOP. DAG size: 43 [2020-12-09 05:36:37,324 WARN L197 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 37 [2020-12-09 05:36:47,462 WARN L197 SmtUtils]: Spent 3.08 s on a formula simplification that was a NOOP. DAG size: 43 [2020-12-09 05:36:48,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:36:48,998 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-12-09 05:36:49,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-09 05:36:49,023 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 15 [2020-12-09 05:36:49,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:36:49,024 INFO L225 Difference]: With dead ends: 57 [2020-12-09 05:36:49,024 INFO L226 Difference]: Without dead ends: 51 [2020-12-09 05:36:49,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 227.1s TimeCoverageRelationStatistics Valid=376, Invalid=1106, Unknown=16, NotChecked=308, Total=1806 [2020-12-09 05:36:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-09 05:36:49,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2020-12-09 05:36:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-09 05:36:49,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-12-09 05:36:49,032 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 15 [2020-12-09 05:36:49,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:36:49,033 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-12-09 05:36:49,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-09 05:36:49,033 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-12-09 05:36:49,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 05:36:49,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:36:49,033 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 05:36:49,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 mathsat -unsat_core_generation=3,11 cvc4 --incremental --print-success --lang smt [2020-12-09 05:36:49,637 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:36:49,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:36:49,638 INFO L82 PathProgramCache]: Analyzing trace with hash -500633624, now seen corresponding path program 1 times [2020-12-09 05:36:49,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 05:36:49,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006543927] [2020-12-09 05:36:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-12-09 05:36:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:36:49,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 05:36:49,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:36:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:36:49,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:36:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:36:50,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006543927] [2020-12-09 05:36:50,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [894997811] [2020-12-09 05:36:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt [2020-12-09 05:36:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:36:50,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 05:36:50,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:36:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:36:50,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:36:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:36:50,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531726125] [2020-12-09 05:36:50,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:36:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:36:50,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 05:36:50,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:36:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:36:50,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:36:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:36:50,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 05:36:50,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2020-12-09 05:36:50,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479367855] [2020-12-09 05:36:50,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 05:36:50,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 05:36:50,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 05:36:50,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-09 05:36:50,770 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 10 states. [2020-12-09 05:36:51,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:36:51,735 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-12-09 05:36:51,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 05:36:51,736 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-09 05:36:51,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:36:51,737 INFO L225 Difference]: With dead ends: 54 [2020-12-09 05:36:51,737 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 05:36:51,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-12-09 05:36:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 05:36:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2020-12-09 05:36:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 05:36:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-09 05:36:51,742 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-12-09 05:36:51,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:36:51,743 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-09 05:36:51,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 05:36:51,743 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-09 05:36:51,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 05:36:51,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:36:51,744 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 05:36:52,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt,13 mathsat -unsat_core_generation=3,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:36:52,346 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:36:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:36:52,347 INFO L82 PathProgramCache]: Analyzing trace with hash -859769786, now seen corresponding path program 2 times [2020-12-09 05:36:52,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 05:36:52,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099981057] [2020-12-09 05:36:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-12-09 05:36:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 05:36:52,676 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 05:36:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 05:36:53,013 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 05:36:53,068 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 05:36:53,068 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 05:36:53,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3 [2020-12-09 05:36:53,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:36:53 BoogieIcfgContainer [2020-12-09 05:36:53,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 05:36:53,328 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 05:36:53,328 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 05:36:53,328 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 05:36:53,329 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:27:01" (3/4) ... [2020-12-09 05:36:53,330 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 05:36:53,362 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_91e1ecc6-b1f2-4d7a-9fbc-06433dbfa9ce/bin/utaipan/witness.graphml [2020-12-09 05:36:53,362 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 05:36:53,363 INFO L168 Benchmark]: Toolchain (without parser) took 592190.14 ms. Allocated memory was 50.3 MB in the beginning and 65.0 MB in the end (delta: 14.7 MB). Free memory was 28.7 MB in the beginning and 30.4 MB in the end (delta: -1.7 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. [2020-12-09 05:36:53,363 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 50.3 MB. Free memory was 33.0 MB in the beginning and 32.9 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:36:53,364 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.33 ms. Allocated memory is still 50.3 MB. Free memory was 28.5 MB in the beginning and 29.6 MB in the end (delta: -1.1 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2020-12-09 05:36:53,364 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.61 ms. Allocated memory was 50.3 MB in the beginning and 65.0 MB in the end (delta: 14.7 MB). Free memory was 29.6 MB in the beginning and 48.9 MB in the end (delta: -19.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:36:53,364 INFO L168 Benchmark]: Boogie Preprocessor took 24.19 ms. Allocated memory is still 65.0 MB. Free memory was 48.9 MB in the beginning and 47.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:36:53,365 INFO L168 Benchmark]: RCFGBuilder took 546.25 ms. Allocated memory is still 65.0 MB. Free memory was 47.6 MB in the beginning and 33.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 05:36:53,365 INFO L168 Benchmark]: TraceAbstraction took 591346.09 ms. Allocated memory is still 65.0 MB. Free memory was 33.4 MB in the beginning and 33.4 MB in the end (delta: -24.6 kB). Peak memory consumption was 1.8 MB. Max. memory is 16.1 GB. [2020-12-09 05:36:53,365 INFO L168 Benchmark]: Witness Printer took 34.36 ms. Allocated memory is still 65.0 MB. Free memory was 33.4 MB in the beginning and 30.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:36:53,367 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 50.3 MB. Free memory was 33.0 MB in the beginning and 32.9 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 195.33 ms. Allocated memory is still 50.3 MB. Free memory was 28.5 MB in the beginning and 29.6 MB in the end (delta: -1.1 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.61 ms. Allocated memory was 50.3 MB in the beginning and 65.0 MB in the end (delta: 14.7 MB). Free memory was 29.6 MB in the beginning and 48.9 MB in the end (delta: -19.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.19 ms. Allocated memory is still 65.0 MB. Free memory was 48.9 MB in the beginning and 47.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 546.25 ms. Allocated memory is still 65.0 MB. Free memory was 47.6 MB in the beginning and 33.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 591346.09 ms. Allocated memory is still 65.0 MB. Free memory was 33.4 MB in the beginning and 33.4 MB in the end (delta: -24.6 kB). Peak memory consumption was 1.8 MB. Max. memory is 16.1 GB. * Witness Printer took 34.36 ms. Allocated memory is still 65.0 MB. Free memory was 33.4 MB in the beginning and 30.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int counter = 0; VAL [counter=0] [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [counter=0] [L31] EXPR counter++ VAL [counter=1] [L31] COND TRUE counter++<2 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(x <= X)) VAL [counter=1] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=1] [L45] x++ VAL [counter=1] [L31] EXPR counter++ VAL [counter=2] [L31] COND TRUE counter++<2 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=2] [L35] COND FALSE !(!(x <= X)) VAL [counter=2] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=2] [L45] x++ VAL [counter=2] [L31] EXPR counter++ VAL [counter=3] [L31] COND FALSE !(counter++<2) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x [L14] COND TRUE !(cond) VAL [counter=3] [L16] reach_error() VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 591.2s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 268.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 82 SDtfs, 136 SDslu, 326 SDs, 0 SdLazy, 391 SolverSat, 83 SolverUnsat, 27 SolverUnknown, 0 SolverNotchecked, 93.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 376 GetRequests, 275 SyntacticMatches, 15 SemanticMatches, 86 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 313.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 57 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 177.1s SatisfiabilityAnalysisTime, 142.0s InterpolantComputationTime, 205 NumberOfCodeBlocks, 205 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 334 ConstructedInterpolants, 0 QuantifiedInterpolants, 79042 SizeOfPredicates, 95 NumberOfNonLiveVariables, 712 ConjunctsInSsa, 163 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 18/126 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...