./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark17_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark17_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P --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 32bit --witnessprinter.graph.data.programhash a22440a8f255aec9d5730865f842f7cbb927d7105e4870e8c7e734895eef852b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:44:53,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:44:53,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:44:53,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:44:53,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:44:53,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:44:53,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:44:53,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:44:53,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:44:53,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:44:53,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:44:53,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:44:53,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:44:53,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:44:53,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:44:53,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:44:53,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:44:53,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:44:53,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:44:53,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:44:53,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:44:53,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:44:53,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:44:53,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:44:53,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:44:53,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:44:53,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:44:53,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:44:53,200 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:44:53,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:44:53,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:44:53,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:44:53,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:44:53,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:44:53,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:44:53,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:44:53,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:44:53,209 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:44:53,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:44:53,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:44:53,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:44:53,213 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-11-21 01:44:53,264 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:44:53,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:44:53,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:44:53,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:44:53,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:44:53,265 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:44:53,266 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:44:53,266 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:44:53,266 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:44:53,267 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:44:53,268 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:44:53,269 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:44:53,269 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:44:53,269 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:44:53,269 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:44:53,269 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:44:53,270 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:44:53,270 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:44:53,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:44:53,271 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:44:53,271 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:44:53,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:44:53,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:44:53,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:44:53,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:44:53,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:44:53,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:44:53,274 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-21 01:44:53,274 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:44:53,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:44:53,275 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:44:53,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:44:53,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:44:53,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:44:53,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:44:53,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:44:53,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:44:53,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:44:53,277 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:44:53,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:44:53,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:44:53,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:44:53,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:44:53,278 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_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a22440a8f255aec9d5730865f842f7cbb927d7105e4870e8c7e734895eef852b [2021-11-21 01:44:53,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:44:53,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:44:53,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:44:53,567 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:44:53,568 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:44:53,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/loop-zilu/benchmark17_conjunctive.i [2021-11-21 01:44:53,646 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/data/e78d96a18/0718722f8a7c42738e97ee59cd49a253/FLAG4a537f76d [2021-11-21 01:44:54,055 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:44:54,056 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/sv-benchmarks/c/loop-zilu/benchmark17_conjunctive.i [2021-11-21 01:44:54,064 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/data/e78d96a18/0718722f8a7c42738e97ee59cd49a253/FLAG4a537f76d [2021-11-21 01:44:54,454 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/data/e78d96a18/0718722f8a7c42738e97ee59cd49a253 [2021-11-21 01:44:54,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:44:54,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:44:54,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:44:54,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:44:54,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:44:54,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:44:54" (1/1) ... [2021-11-21 01:44:54,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3535b5a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:54, skipping insertion in model container [2021-11-21 01:44:54,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:44:54" (1/1) ... [2021-11-21 01:44:54,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:44:54,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:44:54,666 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/sv-benchmarks/c/loop-zilu/benchmark17_conjunctive.i[873,886] [2021-11-21 01:44:54,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:44:54,693 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:44:54,706 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/sv-benchmarks/c/loop-zilu/benchmark17_conjunctive.i[873,886] [2021-11-21 01:44:54,721 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:44:54,738 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:44:54,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:54 WrapperNode [2021-11-21 01:44:54,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:44:54,740 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:44:54,740 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:44:54,740 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:44:54,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:54" (1/1) ... [2021-11-21 01:44:54,756 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:54" (1/1) ... [2021-11-21 01:44:54,778 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2021-11-21 01:44:54,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:44:54,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:44:54,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:44:54,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:44:54,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:54" (1/1) ... [2021-11-21 01:44:54,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:54" (1/1) ... [2021-11-21 01:44:54,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:54" (1/1) ... [2021-11-21 01:44:54,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:54" (1/1) ... [2021-11-21 01:44:54,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:54" (1/1) ... [2021-11-21 01:44:54,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:54" (1/1) ... [2021-11-21 01:44:54,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:54" (1/1) ... [2021-11-21 01:44:54,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:44:54,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:44:54,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:44:54,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:44:54,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:54" (1/1) ... [2021-11-21 01:44:54,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:44:54,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:44:54,852 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:44:54,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:44:54,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:44:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:44:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:44:54,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:44:54,977 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:44:54,980 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:44:55,144 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:44:55,186 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:44:55,186 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:44:55,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:44:55 BoogieIcfgContainer [2021-11-21 01:44:55,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:44:55,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:44:55,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:44:55,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:44:55,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:44:54" (1/3) ... [2021-11-21 01:44:55,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8b8bcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:44:55, skipping insertion in model container [2021-11-21 01:44:55,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:54" (2/3) ... [2021-11-21 01:44:55,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8b8bcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:44:55, skipping insertion in model container [2021-11-21 01:44:55,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:44:55" (3/3) ... [2021-11-21 01:44:55,197 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark17_conjunctive.i [2021-11-21 01:44:55,203 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:44:55,203 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-21 01:44:55,250 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:44:55,258 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 [2021-11-21 01:44:55,258 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-21 01:44:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:55,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 01:44:55,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:55,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 01:44:55,295 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:44:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:55,301 INFO L85 PathProgramCache]: Analyzing trace with hash 2092610, now seen corresponding path program 1 times [2021-11-21 01:44:55,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:55,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433805902] [2021-11-21 01:44:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:55,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:44:55,467 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:55,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433805902] [2021-11-21 01:44:55,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433805902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:55,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:55,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:44:55,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398642789] [2021-11-21 01:44:55,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:55,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:44:55,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:55,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:44:55,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:44:55,506 INFO L87 Difference]: Start difference. First operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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) [2021-11-21 01:44:55,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:55,570 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-21 01:44:55,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:44:55,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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 [2021-11-21 01:44:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:55,580 INFO L225 Difference]: With dead ends: 20 [2021-11-21 01:44:55,580 INFO L226 Difference]: Without dead ends: 15 [2021-11-21 01:44:55,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:44:55,586 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:55,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:44:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-21 01:44:55,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-11-21 01:44:55,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:55,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-21 01:44:55,615 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 4 [2021-11-21 01:44:55,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:55,616 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-21 01:44:55,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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) [2021-11-21 01:44:55,616 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-21 01:44:55,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:44:55,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:55,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 01:44:55,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:44:55,617 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:44:55,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:55,618 INFO L85 PathProgramCache]: Analyzing trace with hash 64870960, now seen corresponding path program 1 times [2021-11-21 01:44:55,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:55,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973216740] [2021-11-21 01:44:55,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:55,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:44:55,656 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:55,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973216740] [2021-11-21 01:44:55,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973216740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:55,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:55,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:44:55,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947090670] [2021-11-21 01:44:55,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:55,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:44:55,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:55,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:44:55,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:44:55,660 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:55,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:55,678 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-11-21 01:44:55,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:44:55,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 01:44:55,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:55,680 INFO L225 Difference]: With dead ends: 13 [2021-11-21 01:44:55,680 INFO L226 Difference]: Without dead ends: 12 [2021-11-21 01:44:55,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:44:55,682 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:55,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 10 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:44:55,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-21 01:44:55,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-21 01:44:55,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-11-21 01:44:55,687 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 5 [2021-11-21 01:44:55,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:55,687 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-11-21 01:44:55,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:55,688 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-11-21 01:44:55,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:44:55,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:55,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:44:55,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:44:55,689 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:44:55,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:55,690 INFO L85 PathProgramCache]: Analyzing trace with hash 2010999812, now seen corresponding path program 1 times [2021-11-21 01:44:55,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:55,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023565659] [2021-11-21 01:44:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:55,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:44:55,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:55,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023565659] [2021-11-21 01:44:55,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023565659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:55,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:55,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:44:55,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454209047] [2021-11-21 01:44:55,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:55,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:44:55,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:55,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:44:55,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:44:55,730 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:55,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:55,754 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-11-21 01:44:55,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:44:55,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 01:44:55,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:55,755 INFO L225 Difference]: With dead ends: 17 [2021-11-21 01:44:55,755 INFO L226 Difference]: Without dead ends: 16 [2021-11-21 01:44:55,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:44:55,757 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:55,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 15 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:44:55,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-21 01:44:55,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2021-11-21 01:44:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:55,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-11-21 01:44:55,763 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 6 [2021-11-21 01:44:55,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:55,763 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-11-21 01:44:55,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:55,764 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-11-21 01:44:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:44:55,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:55,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:55,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:44:55,765 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:44:55,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:55,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2083515214, now seen corresponding path program 1 times [2021-11-21 01:44:55,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:55,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954978427] [2021-11-21 01:44:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:55,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:44:55,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:55,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954978427] [2021-11-21 01:44:55,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954978427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:55,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:55,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:44:55,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080959936] [2021-11-21 01:44:55,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:55,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:44:55,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:55,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:44:55,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:44:55,807 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:55,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:55,834 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-11-21 01:44:55,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:44:55,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 01:44:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:55,853 INFO L225 Difference]: With dead ends: 14 [2021-11-21 01:44:55,853 INFO L226 Difference]: Without dead ends: 13 [2021-11-21 01:44:55,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:44:55,855 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:55,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:44:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-21 01:44:55,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-21 01:44:55,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:55,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-21 01:44:55,860 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2021-11-21 01:44:55,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:55,860 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-21 01:44:55,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:55,861 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-21 01:44:55,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:44:55,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:55,861 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:55,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:44:55,862 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:44:55,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:55,863 INFO L85 PathProgramCache]: Analyzing trace with hash -803359244, now seen corresponding path program 1 times [2021-11-21 01:44:55,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:55,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100759527] [2021-11-21 01:44:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:55,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:44:55,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:55,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100759527] [2021-11-21 01:44:55,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100759527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:44:55,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137163426] [2021-11-21 01:44:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:55,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:55,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:44:55,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:44:55,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:44:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:56,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:44:56,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:44:56,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:44:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:44:56,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137163426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:44:56,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1195001432] [2021-11-21 01:44:56,214 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:44:56,214 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:44:56,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:44:56,227 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:44:56,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:44:57,874 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:44:58,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1195001432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:58,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:44:58,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5, 5] total 14 [2021-11-21 01:44:58,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384173723] [2021-11-21 01:44:58,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:58,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:44:58,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:58,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:44:58,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:44:58,268 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:58,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:58,765 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-11-21 01:44:58,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:44:58,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-21 01:44:58,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:58,766 INFO L225 Difference]: With dead ends: 13 [2021-11-21 01:44:58,766 INFO L226 Difference]: Without dead ends: 12 [2021-11-21 01:44:58,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:44:58,769 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:58,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:44:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-21 01:44:58,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-21 01:44:58,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:58,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-11-21 01:44:58,773 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2021-11-21 01:44:58,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:58,773 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-11-21 01:44:58,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:58,774 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-11-21 01:44:58,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:44:58,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:58,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2021-11-21 01:44:58,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:44:58,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:58,975 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:44:58,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:58,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1065881398, now seen corresponding path program 1 times [2021-11-21 01:44:58,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:58,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221265880] [2021-11-21 01:44:58,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:58,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:44:59,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:59,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221265880] [2021-11-21 01:44:59,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221265880] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:44:59,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725453140] [2021-11-21 01:44:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:59,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:59,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:44:59,026 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:44:59,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:44:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:59,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:44:59,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:44:59,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:44:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:44:59,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725453140] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:44:59,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1158161650] [2021-11-21 01:44:59,153 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:44:59,153 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:44:59,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:44:59,153 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:44:59,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:00,321 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:00,736 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:00,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:00,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-21 01:45:00,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624575518] [2021-11-21 01:45:00,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:00,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:45:00,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:00,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:45:00,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:45:00,739 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 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) [2021-11-21 01:45:00,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:00,841 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-11-21 01:45:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:45:00,843 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 01:45:00,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:00,844 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:45:00,844 INFO L226 Difference]: Without dead ends: 28 [2021-11-21 01:45:00,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:45:00,848 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:00,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 27 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:45:00,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-21 01:45:00,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-21 01:45:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-21 01:45:00,861 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 11 [2021-11-21 01:45:00,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:00,862 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-21 01:45:00,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 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) [2021-11-21 01:45:00,862 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-21 01:45:00,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 01:45:00,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:00,864 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1] [2021-11-21 01:45:00,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 01:45:01,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 01:45:01,079 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:45:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:01,079 INFO L85 PathProgramCache]: Analyzing trace with hash 953924228, now seen corresponding path program 2 times [2021-11-21 01:45:01,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:01,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503009990] [2021-11-21 01:45:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:01,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:01,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:01,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503009990] [2021-11-21 01:45:01,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503009990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:01,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585404515] [2021-11-21 01:45:01,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:45:01,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:01,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:01,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:01,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:45:01,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 01:45:01,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:45:01,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:45:01,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:01,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:01,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585404515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:01,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1056942990] [2021-11-21 01:45:01,546 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:45:01,547 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:01,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:01,548 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:01,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:02,657 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:03,090 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:03,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:03,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-11-21 01:45:03,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780826339] [2021-11-21 01:45:03,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:03,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-21 01:45:03,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:03,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-21 01:45:03,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:45:03,093 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:03,310 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-11-21 01:45:03,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 01:45:03,315 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-21 01:45:03,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:03,316 INFO L225 Difference]: With dead ends: 59 [2021-11-21 01:45:03,316 INFO L226 Difference]: Without dead ends: 58 [2021-11-21 01:45:03,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=322, Invalid=1084, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 01:45:03,318 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 57 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:03,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 34 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:45:03,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-21 01:45:03,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-11-21 01:45:03,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-11-21 01:45:03,331 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 26 [2021-11-21 01:45:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:03,331 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-11-21 01:45:03,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-11-21 01:45:03,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-21 01:45:03,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:03,335 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1] [2021-11-21 01:45:03,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:03,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 01:45:03,563 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:45:03,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:03,563 INFO L85 PathProgramCache]: Analyzing trace with hash 999405636, now seen corresponding path program 3 times [2021-11-21 01:45:03,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:03,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132193694] [2021-11-21 01:45:03,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:03,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:03,875 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:03,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132193694] [2021-11-21 01:45:03,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132193694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:03,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546380135] [2021-11-21 01:45:03,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:45:03,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:03,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:03,876 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:03,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:45:03,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:45:03,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:45:03,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:45:03,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:04,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:04,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546380135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:04,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [817334810] [2021-11-21 01:45:04,632 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:45:04,633 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:04,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:04,633 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:04,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:05,747 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:06,113 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:06,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:06,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2021-11-21 01:45:06,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840973171] [2021-11-21 01:45:06,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:06,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-21 01:45:06,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:06,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-21 01:45:06,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=2085, Unknown=0, NotChecked=0, Total=2652 [2021-11-21 01:45:06,117 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 46 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:06,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:06,714 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2021-11-21 01:45:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-21 01:45:06,714 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 46 states have internal predecessors, (111), 0 states have call successors, (0), 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 56 [2021-11-21 01:45:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:06,715 INFO L225 Difference]: With dead ends: 119 [2021-11-21 01:45:06,716 INFO L226 Difference]: Without dead ends: 118 [2021-11-21 01:45:06,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1348, Invalid=4054, Unknown=0, NotChecked=0, Total=5402 [2021-11-21 01:45:06,718 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 157 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:06,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 63 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:45:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-21 01:45:06,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-11-21 01:45:06,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-11-21 01:45:06,734 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 56 [2021-11-21 01:45:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:06,735 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-11-21 01:45:06,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 46 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:06,736 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-11-21 01:45:06,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-21 01:45:06,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:06,739 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1] [2021-11-21 01:45:06,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:06,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:06,947 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:45:06,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:06,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1525546044, now seen corresponding path program 4 times [2021-11-21 01:45:06,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:06,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469324891] [2021-11-21 01:45:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:06,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:07,755 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:07,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469324891] [2021-11-21 01:45:07,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469324891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:07,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567874683] [2021-11-21 01:45:07,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:45:07,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:07,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:07,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:07,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:45:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:07,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-21 01:45:07,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:08,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:10,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567874683] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:10,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1702374313] [2021-11-21 01:45:10,119 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:45:10,119 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:10,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:10,120 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:10,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:11,155 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:11,652 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:11,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:11,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2021-11-21 01:45:11,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005233975] [2021-11-21 01:45:11,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:11,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-21 01:45:11,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:11,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-21 01:45:11,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2271, Invalid=7629, Unknown=0, NotChecked=0, Total=9900 [2021-11-21 01:45:11,660 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 94 states, 93 states have (on average 2.4838709677419355) internal successors, (231), 94 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:13,241 INFO L93 Difference]: Finished difference Result 239 states and 262 transitions. [2021-11-21 01:45:13,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-21 01:45:13,253 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.4838709677419355) internal successors, (231), 94 states have internal predecessors, (231), 0 states have call successors, (0), 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 116 [2021-11-21 01:45:13,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:13,262 INFO L225 Difference]: With dead ends: 239 [2021-11-21 01:45:13,262 INFO L226 Difference]: Without dead ends: 238 [2021-11-21 01:45:13,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4904 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5560, Invalid=15610, Unknown=0, NotChecked=0, Total=21170 [2021-11-21 01:45:13,272 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 352 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:13,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 110 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:45:13,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-21 01:45:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2021-11-21 01:45:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0042372881355932) internal successors, (237), 236 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:13,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2021-11-21 01:45:13,320 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 116 [2021-11-21 01:45:13,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:13,324 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2021-11-21 01:45:13,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.4838709677419355) internal successors, (231), 94 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:13,324 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2021-11-21 01:45:13,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-21 01:45:13,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:13,333 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1] [2021-11-21 01:45:13,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:13,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:13,534 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:45:13,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:13,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1921787196, now seen corresponding path program 5 times [2021-11-21 01:45:13,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:13,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4788438] [2021-11-21 01:45:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:13,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:16,092 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:16,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4788438] [2021-11-21 01:45:16,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4788438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:16,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776449963] [2021-11-21 01:45:16,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:45:16,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:16,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:16,093 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:16,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:45:16,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-21 01:45:16,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:45:16,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-21 01:45:16,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:16,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:23,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776449963] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:23,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [395041556] [2021-11-21 01:45:23,070 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:45:23,070 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:23,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:23,071 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:23,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:23,916 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:24,583 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:24,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:24,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2021-11-21 01:45:24,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391189746] [2021-11-21 01:45:24,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:24,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2021-11-21 01:45:24,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:24,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2021-11-21 01:45:24,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9135, Invalid=29085, Unknown=0, NotChecked=0, Total=38220 [2021-11-21 01:45:24,598 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand has 190 states, 189 states have (on average 2.492063492063492) internal successors, (471), 190 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:30,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:30,164 INFO L93 Difference]: Finished difference Result 479 states and 526 transitions. [2021-11-21 01:45:30,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-11-21 01:45:30,164 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 2.492063492063492) internal successors, (471), 190 states have internal predecessors, (471), 0 states have call successors, (0), 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 236 [2021-11-21 01:45:30,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:30,168 INFO L225 Difference]: With dead ends: 479 [2021-11-21 01:45:30,168 INFO L226 Difference]: Without dead ends: 478 [2021-11-21 01:45:30,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19064 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=22624, Invalid=61186, Unknown=0, NotChecked=0, Total=83810 [2021-11-21 01:45:30,176 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 892 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:30,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 211 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:45:30,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-21 01:45:30,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 477. [2021-11-21 01:45:30,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.0021008403361344) internal successors, (477), 476 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:30,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 477 transitions. [2021-11-21 01:45:30,214 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 477 transitions. Word has length 236 [2021-11-21 01:45:30,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:30,215 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 477 transitions. [2021-11-21 01:45:30,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 2.492063492063492) internal successors, (471), 190 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 477 transitions. [2021-11-21 01:45:30,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-21 01:45:30,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:30,227 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 94, 94, 1, 1, 1] [2021-11-21 01:45:30,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:30,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:45:30,452 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:45:30,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:30,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1413253316, now seen corresponding path program 6 times [2021-11-21 01:45:30,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:30,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821534089] [2021-11-21 01:45:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:30,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:39,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:39,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821534089] [2021-11-21 01:45:39,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821534089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:39,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095525770] [2021-11-21 01:45:39,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:45:39,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:39,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:39,954 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:39,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:45:40,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:45:40,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:45:40,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 191 conjunts are in the unsatisfiable core [2021-11-21 01:45:40,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:41,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:46:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:04,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095525770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:46:04,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [900486787] [2021-11-21 01:46:04,537 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:46:04,537 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:46:04,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:46:04,537 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:46:04,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:46:05,480 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:46:06,620 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:46:06,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:46:06,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2021-11-21 01:46:06,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100535462] [2021-11-21 01:46:06,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:46:06,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2021-11-21 01:46:06,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:06,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2021-11-21 01:46:06,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36687, Invalid=113469, Unknown=0, NotChecked=0, Total=150156 [2021-11-21 01:46:06,684 INFO L87 Difference]: Start difference. First operand 477 states and 477 transitions. Second operand has 382 states, 381 states have (on average 2.4960629921259843) internal successors, (951), 382 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:31,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:31,738 INFO L93 Difference]: Finished difference Result 959 states and 1054 transitions. [2021-11-21 01:46:31,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-11-21 01:46:31,739 INFO L78 Accepts]: Start accepts. Automaton has has 382 states, 381 states have (on average 2.4960629921259843) internal successors, (951), 382 states have internal predecessors, (951), 0 states have call successors, (0), 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 476 [2021-11-21 01:46:31,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:31,744 INFO L225 Difference]: With dead ends: 959 [2021-11-21 01:46:31,744 INFO L226 Difference]: Without dead ends: 958 [2021-11-21 01:46:31,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1807 GetRequests, 1231 SyntacticMatches, 0 SemanticMatches, 576 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75032 ImplicationChecksByTransitivity, 48.2s TimeCoverageRelationStatistics Valid=91312, Invalid=242194, Unknown=0, NotChecked=0, Total=333506 [2021-11-21 01:46:31,760 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 2087 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2087 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:31,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2087 Valid, 398 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:46:31,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-11-21 01:46:31,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 957. [2021-11-21 01:46:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 1.0010460251046025) internal successors, (957), 956 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:31,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 957 transitions. [2021-11-21 01:46:31,812 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 957 transitions. Word has length 476 [2021-11-21 01:46:31,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:31,814 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 957 transitions. [2021-11-21 01:46:31,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 382 states, 381 states have (on average 2.4960629921259843) internal successors, (951), 382 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 957 transitions. [2021-11-21 01:46:31,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2021-11-21 01:46:31,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:31,852 INFO L514 BasicCegarLoop]: trace histogram [191, 191, 191, 190, 190, 1, 1, 1] [2021-11-21 01:46:31,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 01:46:32,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:32,067 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:46:32,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:32,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1038214340, now seen corresponding path program 7 times [2021-11-21 01:46:32,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:32,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900354539] [2021-11-21 01:46:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:32,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:47:09,138 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:09,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900354539] [2021-11-21 01:47:09,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900354539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:47:09,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240015553] [2021-11-21 01:47:09,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:47:09,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:09,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:09,146 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:09,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:47:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:09,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 2511 conjuncts, 383 conjunts are in the unsatisfiable core [2021-11-21 01:47:09,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:47:11,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:46,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240015553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:48:46,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1806595588] [2021-11-21 01:48:46,155 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:48:46,155 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:48:46,156 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:48:46,156 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:48:46,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:48:47,104 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:48:49,127 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:48:49,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:48:49,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [383, 383, 383] total 765 [2021-11-21 01:48:49,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616064254] [2021-11-21 01:48:49,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:48:49,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 766 states [2021-11-21 01:48:49,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:48:49,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 766 interpolants. [2021-11-21 01:48:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147087, Invalid=448125, Unknown=0, NotChecked=0, Total=595212 [2021-11-21 01:48:49,200 INFO L87 Difference]: Start difference. First operand 957 states and 957 transitions. Second operand has 766 states, 765 states have (on average 2.4980392156862745) internal successors, (1911), 766 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:52:16,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:16,939 INFO L93 Difference]: Finished difference Result 1919 states and 2110 transitions. [2021-11-21 01:52:16,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 767 states. [2021-11-21 01:52:16,944 INFO L78 Accepts]: Start accepts. Automaton has has 766 states, 765 states have (on average 2.4980392156862745) internal successors, (1911), 766 states have internal predecessors, (1911), 0 states have call successors, (0), 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 956 [2021-11-21 01:52:16,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:16,956 INFO L225 Difference]: With dead ends: 1919 [2021-11-21 01:52:16,957 INFO L226 Difference]: Without dead ends: 1918 [2021-11-21 01:52:17,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3631 GetRequests, 2479 SyntacticMatches, 0 SemanticMatches, 1152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297560 ImplicationChecksByTransitivity, 195.3s TimeCoverageRelationStatistics Valid=366928, Invalid=963634, Unknown=0, NotChecked=0, Total=1330562 [2021-11-21 01:52:17,052 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 4395 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4395 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:17,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4395 Valid, 791 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 01:52:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-11-21 01:52:17,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1917. [2021-11-21 01:52:17,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1916 states have (on average 1.0005219206680585) internal successors, (1917), 1916 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:52:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 1917 transitions. [2021-11-21 01:52:17,154 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 1917 transitions. Word has length 956 [2021-11-21 01:52:17,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:17,156 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 1917 transitions. [2021-11-21 01:52:17,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 766 states, 765 states have (on average 2.4980392156862745) internal successors, (1911), 766 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:52:17,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 1917 transitions. [2021-11-21 01:52:17,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1917 [2021-11-21 01:52:17,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:17,189 INFO L514 BasicCegarLoop]: trace histogram [383, 383, 383, 382, 382, 1, 1, 1] [2021-11-21 01:52:17,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:52:17,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 01:52:17,390 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:52:17,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:17,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1585668924, now seen corresponding path program 8 times [2021-11-21 01:52:17,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:17,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96423622] [2021-11-21 01:52:17,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:17,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:54:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 365383 backedges. 0 proven. 365383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:54:48,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:54:48,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96423622] [2021-11-21 01:54:48,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96423622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:54:48,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814827665] [2021-11-21 01:54:48,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:54:48,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:54:48,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:54:48,223 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:54:48,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60247803-04de-44fb-a33c-9bd7e494f6df/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:54:56,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 383 check-sat command(s) [2021-11-21 01:54:56,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:54:57,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 5007 conjuncts, 767 conjunts are in the unsatisfiable core [2021-11-21 01:54:57,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:55:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 365383 backedges. 0 proven. 365383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:55:01,481 INFO L328 TraceCheckSpWp]: Computing backward predicates...