./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/Ben-Amram-LMCS2010-Ex2.3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/Ben-Amram-LMCS2010-Ex2.3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9ec0bf4392c8fe4647c82e62efb5bebaadd0d7bdbc2edef80a3ce856001f6a7d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:26:47,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:26:47,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:26:47,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:26:47,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:26:47,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:26:47,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:26:47,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:26:47,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:26:47,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:26:47,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:26:47,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:26:47,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:26:47,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:26:47,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:26:47,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:26:47,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:26:47,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:26:47,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:26:47,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:26:47,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:26:47,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:26:47,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:26:47,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:26:47,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:26:47,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:26:47,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:26:47,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:26:47,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:26:47,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:26:47,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:26:47,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:26:47,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:26:47,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:26:47,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:26:47,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:26:47,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:26:47,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:26:47,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:26:47,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:26:47,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:26:47,162 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-03 05:26:47,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:26:47,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:26:47,209 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:26:47,209 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:26:47,209 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:26:47,209 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:26:47,209 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:26:47,210 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:26:47,210 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:26:47,210 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:26:47,210 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:26:47,210 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:26:47,211 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:26:47,211 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:26:47,211 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:26:47,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:26:47,214 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:26:47,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:26:47,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:26:47,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:26:47,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:26:47,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:26:47,215 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-03 05:26:47,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:26:47,216 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:26:47,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:26:47,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:26:47,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:26:47,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:26:47,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:26:47,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:26:47,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:26:47,220 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:26:47,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:26:47,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:26:47,220 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:26:47,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:26:47,221 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ec0bf4392c8fe4647c82e62efb5bebaadd0d7bdbc2edef80a3ce856001f6a7d [2021-11-03 05:26:47,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:26:47,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:26:47,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:26:47,542 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:26:47,543 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:26:47,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/termination-crafted-lit/Ben-Amram-LMCS2010-Ex2.3.c [2021-11-03 05:26:47,613 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH/data/af6539105/7d1d1d0cba8e4813844e064ddeaf905d/FLAG9d3f3ab56 [2021-11-03 05:26:48,128 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:26:48,128 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/sv-benchmarks/c/termination-crafted-lit/Ben-Amram-LMCS2010-Ex2.3.c [2021-11-03 05:26:48,139 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH/data/af6539105/7d1d1d0cba8e4813844e064ddeaf905d/FLAG9d3f3ab56 [2021-11-03 05:26:48,497 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH/data/af6539105/7d1d1d0cba8e4813844e064ddeaf905d [2021-11-03 05:26:48,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:26:48,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:26:48,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:26:48,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:26:48,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:26:48,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:26:48" (1/1) ... [2021-11-03 05:26:48,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3de84831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:48, skipping insertion in model container [2021-11-03 05:26:48,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:26:48" (1/1) ... [2021-11-03 05:26:48,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:26:48,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:26:48,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:26:48,696 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:26:48,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:26:48,742 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:26:48,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:48 WrapperNode [2021-11-03 05:26:48,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:26:48,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:26:48,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:26:48,745 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:26:48,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:48" (1/1) ... [2021-11-03 05:26:48,760 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:48" (1/1) ... [2021-11-03 05:26:48,781 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:26:48,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:26:48,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:26:48,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:26:48,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:48" (1/1) ... [2021-11-03 05:26:48,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:48" (1/1) ... [2021-11-03 05:26:48,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:48" (1/1) ... [2021-11-03 05:26:48,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:48" (1/1) ... [2021-11-03 05:26:48,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:48" (1/1) ... [2021-11-03 05:26:48,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:48" (1/1) ... [2021-11-03 05:26:48,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:48" (1/1) ... [2021-11-03 05:26:48,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:26:48,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:26:48,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:26:48,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:26:48,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:48" (1/1) ... [2021-11-03 05:26:48,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:26:48,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:26:48,842 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:26:48,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:26:48,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:26:48,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:26:49,131 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:26:49,132 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-03 05:26:49,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:26:49 BoogieIcfgContainer [2021-11-03 05:26:49,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:26:49,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:26:49,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:26:49,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:26:49,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:26:48" (1/3) ... [2021-11-03 05:26:49,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ddabfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:26:49, skipping insertion in model container [2021-11-03 05:26:49,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:26:48" (2/3) ... [2021-11-03 05:26:49,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ddabfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:26:49, skipping insertion in model container [2021-11-03 05:26:49,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:26:49" (3/3) ... [2021-11-03 05:26:49,142 INFO L111 eAbstractionObserver]: Analyzing ICFG Ben-Amram-LMCS2010-Ex2.3.c [2021-11-03 05:26:49,147 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:26:49,147 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-03 05:26:49,192 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:26:49,215 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:26:49,215 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-03 05:26:49,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:49,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-03 05:26:49,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:26:49,248 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-03 05:26:49,248 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 05:26:49,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:26:49,254 INFO L85 PathProgramCache]: Analyzing trace with hash 963531, now seen corresponding path program 1 times [2021-11-03 05:26:49,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:26:49,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856012159] [2021-11-03 05:26:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:26:49,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:26:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:26:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:26:49,466 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:26:49,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856012159] [2021-11-03 05:26:49,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856012159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:26:49,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:26:49,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-03 05:26:49,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918732756] [2021-11-03 05:26:49,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:26:49,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:26:49,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:26:49,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:26:49,502 INFO L87 Difference]: Start difference. First operand has 16 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:26:49,579 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-11-03 05:26:49,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:26:49,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-03 05:26:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:26:49,589 INFO L225 Difference]: With dead ends: 30 [2021-11-03 05:26:49,594 INFO L226 Difference]: Without dead ends: 27 [2021-11-03 05:26:49,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:26:49,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-03 05:26:49,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-11-03 05:26:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:49,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-11-03 05:26:49,633 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 4 [2021-11-03 05:26:49,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:26:49,635 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-11-03 05:26:49,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-11-03 05:26:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-03 05:26:49,636 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:26:49,636 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-03 05:26:49,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:26:49,637 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 05:26:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:26:49,642 INFO L85 PathProgramCache]: Analyzing trace with hash 963339, now seen corresponding path program 1 times [2021-11-03 05:26:49,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:26:49,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235953731] [2021-11-03 05:26:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:26:49,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:26:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:26:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:26:49,712 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:26:49,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235953731] [2021-11-03 05:26:49,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235953731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:26:49,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:26:49,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:26:49,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109808564] [2021-11-03 05:26:49,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:26:49,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:26:49,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:26:49,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:26:49,720 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:49,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:26:49,750 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2021-11-03 05:26:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:26:49,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-03 05:26:49,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:26:49,751 INFO L225 Difference]: With dead ends: 21 [2021-11-03 05:26:49,751 INFO L226 Difference]: Without dead ends: 19 [2021-11-03 05:26:49,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:26:49,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-03 05:26:49,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-03 05:26:49,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:49,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-03 05:26:49,756 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 4 [2021-11-03 05:26:49,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:26:49,756 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-03 05:26:49,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:49,757 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-03 05:26:49,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 05:26:49,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:26:49,757 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 05:26:49,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:26:49,758 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 05:26:49,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:26:49,759 INFO L85 PathProgramCache]: Analyzing trace with hash 29869514, now seen corresponding path program 1 times [2021-11-03 05:26:49,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:26:49,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497095765] [2021-11-03 05:26:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:26:49,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:26:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:26:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:26:49,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:26:49,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497095765] [2021-11-03 05:26:49,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497095765] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:26:49,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:26:49,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:26:49,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657081395] [2021-11-03 05:26:49,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:26:49,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:26:49,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:26:49,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:26:49,788 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:49,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:26:49,805 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2021-11-03 05:26:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:26:49,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 05:26:49,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:26:49,807 INFO L225 Difference]: With dead ends: 19 [2021-11-03 05:26:49,807 INFO L226 Difference]: Without dead ends: 18 [2021-11-03 05:26:49,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:26:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-03 05:26:49,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-03 05:26:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.4) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:49,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-03 05:26:49,816 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 5 [2021-11-03 05:26:49,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:26:49,817 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-03 05:26:49,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:49,817 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-03 05:26:49,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 05:26:49,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:26:49,818 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 05:26:49,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:26:49,819 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-03 05:26:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:26:49,820 INFO L85 PathProgramCache]: Analyzing trace with hash 29863556, now seen corresponding path program 1 times [2021-11-03 05:26:49,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:26:49,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895270815] [2021-11-03 05:26:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:26:49,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:26:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 05:26:49,851 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-03 05:26:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 05:26:49,882 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-03 05:26:49,882 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-03 05:26:49,885 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-11-03 05:26:49,889 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-11-03 05:26:49,890 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-11-03 05:26:49,890 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-11-03 05:26:49,891 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-11-03 05:26:49,891 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-11-03 05:26:49,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:26:49,894 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-03 05:26:49,897 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 05:26:49,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 05:26:49 BoogieIcfgContainer [2021-11-03 05:26:49,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 05:26:49,911 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 05:26:49,911 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 05:26:49,912 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 05:26:49,912 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:26:49" (3/4) ... [2021-11-03 05:26:49,914 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-03 05:26:49,952 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH/witness.graphml [2021-11-03 05:26:49,952 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 05:26:49,954 INFO L168 Benchmark]: Toolchain (without parser) took 1450.40 ms. Allocated memory is still 111.1 MB. Free memory was 73.0 MB in the beginning and 86.4 MB in the end (delta: -13.4 MB). Peak memory consumption was 30.8 MB. Max. memory is 16.1 GB. [2021-11-03 05:26:49,954 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 111.1 MB. Free memory was 89.0 MB in the beginning and 88.9 MB in the end (delta: 54.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:26:49,955 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.15 ms. Allocated memory is still 111.1 MB. Free memory was 72.8 MB in the beginning and 87.2 MB in the end (delta: -14.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:26:49,956 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.64 ms. Allocated memory is still 111.1 MB. Free memory was 87.2 MB in the beginning and 86.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:26:49,956 INFO L168 Benchmark]: Boogie Preprocessor took 24.69 ms. Allocated memory is still 111.1 MB. Free memory was 85.8 MB in the beginning and 85.2 MB in the end (delta: 608.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:26:49,957 INFO L168 Benchmark]: RCFGBuilder took 326.84 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 75.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:26:49,957 INFO L168 Benchmark]: TraceAbstraction took 775.05 ms. Allocated memory is still 111.1 MB. Free memory was 75.2 MB in the beginning and 45.8 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:26:49,958 INFO L168 Benchmark]: Witness Printer took 40.72 ms. Allocated memory is still 111.1 MB. Free memory was 45.8 MB in the beginning and 86.4 MB in the end (delta: -40.6 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:26:49,961 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 111.1 MB. Free memory was 89.0 MB in the beginning and 88.9 MB in the end (delta: 54.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 239.15 ms. Allocated memory is still 111.1 MB. Free memory was 72.8 MB in the beginning and 87.2 MB in the end (delta: -14.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.64 ms. Allocated memory is still 111.1 MB. Free memory was 87.2 MB in the beginning and 86.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.69 ms. Allocated memory is still 111.1 MB. Free memory was 85.8 MB in the beginning and 85.2 MB in the end (delta: 608.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 326.84 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 75.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 775.05 ms. Allocated memory is still 111.1 MB. Free memory was 75.2 MB in the beginning and 45.8 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * Witness Printer took 40.72 ms. Allocated memory is still 111.1 MB. Free memory was 45.8 MB in the beginning and 86.4 MB in the end (delta: -40.6 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 24]: integer overflow possible integer overflow possible We found a FailurePath: [L15] int x, y, z; [L16] x = __VERIFIER_nondet_int() [L17] y = __VERIFIER_nondet_int() [L18] z = __VERIFIER_nondet_int() [L20] COND TRUE x > 0 && y > 0 && z > 0 [L21] COND TRUE y > x [L22] y = z [L23] x = __VERIFIER_nondet_int() [L24] x - 1 - UnprovableResult [Line: 24]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 26]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 26]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 28]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 28]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 26 SDslu, 11 SDs, 0 SdLazy, 29 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=1, InterpolantAutomatonStates: 9, 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, 6 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 24 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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! [2021-11-03 05:26:50,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622fd893-6b3d-40fb-91ac-c2ee01abb1c1/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW)