./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NonTerminationSimple4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NonTerminationSimple4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 45cf92b0c6fea336569aa3c590b09eca22523fff4b1b234a5534ea2e1e74fe84 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:01:13,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:01:13,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:01:13,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:01:13,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:01:13,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:01:13,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:01:13,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:01:13,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:01:13,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:01:13,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:01:13,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:01:13,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:01:13,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:01:13,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:01:13,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:01:13,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:01:13,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:01:13,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:01:13,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:01:13,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:01:13,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:01:13,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:01:13,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:01:13,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:01:13,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:01:13,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:01:13,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:01:13,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:01:13,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:01:13,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:01:13,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:01:13,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:01:13,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:01:13,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:01:13,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:01:13,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:01:13,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:01:13,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:01:13,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:01:13,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:01:13,819 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-07 01:01:13,846 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:01:13,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:01:13,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:01:13,848 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:01:13,848 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:01:13,848 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:01:13,849 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:01:13,849 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:01:13,849 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:01:13,849 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:01:13,849 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:01:13,850 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:01:13,850 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:01:13,850 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:01:13,850 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:01:13,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:01:13,851 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:01:13,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:01:13,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:01:13,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:01:13,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:01:13,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:01:13,853 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-07 01:01:13,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:01:13,853 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:01:13,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:01:13,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:01:13,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:01:13,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:01:13,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:01:13,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:01:13,855 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:01:13,855 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:01:13,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:01:13,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:01:13,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:01:13,856 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:01:13,856 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_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45cf92b0c6fea336569aa3c590b09eca22523fff4b1b234a5534ea2e1e74fe84 [2021-11-07 01:01:14,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:01:14,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:01:14,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:01:14,165 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:01:14,166 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:01:14,167 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/termination-crafted/NonTerminationSimple4.c [2021-11-07 01:01:14,253 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/data/7bbbec357/b84ffdd4976e43f692816fa0b7918214/FLAG1066acf68 [2021-11-07 01:01:14,724 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:01:14,725 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/sv-benchmarks/c/termination-crafted/NonTerminationSimple4.c [2021-11-07 01:01:14,730 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/data/7bbbec357/b84ffdd4976e43f692816fa0b7918214/FLAG1066acf68 [2021-11-07 01:01:15,120 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/data/7bbbec357/b84ffdd4976e43f692816fa0b7918214 [2021-11-07 01:01:15,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:01:15,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:01:15,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:01:15,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:01:15,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:01:15,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:01:15" (1/1) ... [2021-11-07 01:01:15,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eeb6514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:15, skipping insertion in model container [2021-11-07 01:01:15,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:01:15" (1/1) ... [2021-11-07 01:01:15,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:01:15,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:01:15,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:01:15,327 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:01:15,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:01:15,390 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:01:15,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:15 WrapperNode [2021-11-07 01:01:15,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:01:15,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:01:15,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:01:15,392 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:01:15,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:15" (1/1) ... [2021-11-07 01:01:15,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:15" (1/1) ... [2021-11-07 01:01:15,424 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:01:15,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:01:15,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:01:15,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:01:15,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:15" (1/1) ... [2021-11-07 01:01:15,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:15" (1/1) ... [2021-11-07 01:01:15,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:15" (1/1) ... [2021-11-07 01:01:15,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:15" (1/1) ... [2021-11-07 01:01:15,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:15" (1/1) ... [2021-11-07 01:01:15,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:15" (1/1) ... [2021-11-07 01:01:15,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:15" (1/1) ... [2021-11-07 01:01:15,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:01:15,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:01:15,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:01:15,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:01:15,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:15" (1/1) ... [2021-11-07 01:01:15,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:01:15,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:01:15,480 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:01:15,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:01:15,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:01:15,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:01:15,711 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:01:15,711 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-07 01:01:15,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:01:15 BoogieIcfgContainer [2021-11-07 01:01:15,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:01:15,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:01:15,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:01:15,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:01:15,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:01:15" (1/3) ... [2021-11-07 01:01:15,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73aa1e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:01:15, skipping insertion in model container [2021-11-07 01:01:15,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:15" (2/3) ... [2021-11-07 01:01:15,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73aa1e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:01:15, skipping insertion in model container [2021-11-07 01:01:15,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:01:15" (3/3) ... [2021-11-07 01:01:15,743 INFO L111 eAbstractionObserver]: Analyzing ICFG NonTerminationSimple4.c [2021-11-07 01:01:15,749 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:01:15,750 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:01:15,844 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:01:15,853 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 [2021-11-07 01:01:15,853 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:01:15,870 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:15,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-07 01:01:15,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:15,876 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-07 01:01:15,877 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-07 01:01:15,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:15,884 INFO L85 PathProgramCache]: Analyzing trace with hash 957573, now seen corresponding path program 1 times [2021-11-07 01:01:15,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:01:15,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255094185] [2021-11-07 01:01:15,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:15,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:01:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:16,084 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:01:16,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255094185] [2021-11-07 01:01:16,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255094185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:16,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:16,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-07 01:01:16,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439886207] [2021-11-07 01:01:16,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:01:16,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:01:16,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:01:16,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:01:16,109 INFO L87 Difference]: Start difference. First operand has 9 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:16,161 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2021-11-07 01:01:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:01:16,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-07 01:01:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:16,175 INFO L225 Difference]: With dead ends: 9 [2021-11-07 01:01:16,175 INFO L226 Difference]: Without dead ends: 6 [2021-11-07 01:01:16,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:01:16,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-07 01:01:16,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-07 01:01:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2021-11-07 01:01:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-07 01:01:16,216 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-07 01:01:16,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:16,218 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-07 01:01:16,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:16,219 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-07 01:01:16,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 01:01:16,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:16,220 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 01:01:16,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:01:16,222 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-07 01:01:16,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:16,228 INFO L85 PathProgramCache]: Analyzing trace with hash 29684810, now seen corresponding path program 1 times [2021-11-07 01:01:16,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:01:16,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89298826] [2021-11-07 01:01:16,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:16,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:01:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:16,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:01:16,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89298826] [2021-11-07 01:01:16,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89298826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:16,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:16,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:01:16,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376062224] [2021-11-07 01:01:16,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:01:16,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:01:16,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:01:16,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:01:16,283 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:16,296 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2021-11-07 01:01:16,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:01:16,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-07 01:01:16,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:16,297 INFO L225 Difference]: With dead ends: 10 [2021-11-07 01:01:16,297 INFO L226 Difference]: Without dead ends: 9 [2021-11-07 01:01:16,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:01:16,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-07 01:01:16,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-07 01:01:16,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-07 01:01:16,302 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-07 01:01:16,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:16,303 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-07 01:01:16,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-07 01:01:16,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:01:16,319 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:16,320 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2021-11-07 01:01:16,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:01:16,321 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-07 01:01:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:16,321 INFO L85 PathProgramCache]: Analyzing trace with hash -423045501, now seen corresponding path program 1 times [2021-11-07 01:01:16,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:01:16,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157273843] [2021-11-07 01:01:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:16,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:01:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:16,361 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:01:16,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157273843] [2021-11-07 01:01:16,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157273843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:01:16,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375910649] [2021-11-07 01:01:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:16,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:01:16,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:01:16,397 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:01:16,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:01:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:16,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:01:16,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:16,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:16,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375910649] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:01:16,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1117616521] [2021-11-07 01:01:16,629 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 01:01:16,629 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:01:16,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:01:16,640 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:01:16,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:01:16,698 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:16,714 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:01:16,737 INFO L180 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-11-07 01:01:16,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:01:16,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:16,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:16,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:16,836 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.6 percent of original size [2021-11-07 01:01:16,841 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:01:16,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:16,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:16,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:16,870 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-07 01:01:16,873 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:01:16,880 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-07 01:01:16,895 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:01:16,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:16,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:16,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:16,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:16,951 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:01:17,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:01:17,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:01:17,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-07 01:01:17,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086854742] [2021-11-07 01:01:17,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:01:17,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:01:17,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:01:17,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:01:17,101 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:17,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:17,138 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-07 01:01:17,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:01:17,139 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 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 8 [2021-11-07 01:01:17,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:17,140 INFO L225 Difference]: With dead ends: 19 [2021-11-07 01:01:17,141 INFO L226 Difference]: Without dead ends: 18 [2021-11-07 01:01:17,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:01:17,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-07 01:01:17,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-07 01:01:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-11-07 01:01:17,151 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2021-11-07 01:01:17,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:17,152 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-11-07 01:01:17,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:17,153 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-11-07 01:01:17,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:01:17,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:17,155 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2021-11-07 01:01:17,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:17,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:01:17,373 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-07 01:01:17,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:17,374 INFO L85 PathProgramCache]: Analyzing trace with hash -861552886, now seen corresponding path program 2 times [2021-11-07 01:01:17,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:01:17,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379739318] [2021-11-07 01:01:17,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:17,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:01:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:17,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:01:17,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379739318] [2021-11-07 01:01:17,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379739318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:01:17,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466839936] [2021-11-07 01:01:17,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:01:17,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:01:17,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:01:17,478 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:01:17,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:01:17,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 01:01:17,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:01:17,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:01:17,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:17,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:17,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466839936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:01:17,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [701099614] [2021-11-07 01:01:17,777 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 01:01:17,777 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:01:17,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:01:17,778 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:01:17,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:01:17,786 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:17,809 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:01:17,816 INFO L180 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-11-07 01:01:17,818 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:01:17,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:17,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:17,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:17,870 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.6 percent of original size [2021-11-07 01:01:17,879 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:01:17,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:17,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:17,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:17,902 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-07 01:01:17,906 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:01:17,914 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-07 01:01:17,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:01:17,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:17,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:17,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:17,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:17,936 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:01:18,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:01:18,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:01:18,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-07 01:01:18,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807508169] [2021-11-07 01:01:18,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:01:18,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:01:18,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:01:18,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:01:18,078 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:18,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:18,143 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-07 01:01:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:01:18,149 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:01:18,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:18,150 INFO L225 Difference]: With dead ends: 37 [2021-11-07 01:01:18,151 INFO L226 Difference]: Without dead ends: 36 [2021-11-07 01:01:18,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:01:18,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-07 01:01:18,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-07 01:01:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-11-07 01:01:18,158 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 17 [2021-11-07 01:01:18,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:18,158 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-11-07 01:01:18,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-11-07 01:01:18,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 01:01:18,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:18,160 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1] [2021-11-07 01:01:18,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:18,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 01:01:18,361 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-07 01:01:18,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:18,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1546325206, now seen corresponding path program 3 times [2021-11-07 01:01:18,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:01:18,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705109693] [2021-11-07 01:01:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:18,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:01:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:18,506 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:01:18,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705109693] [2021-11-07 01:01:18,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705109693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:01:18,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481165094] [2021-11-07 01:01:18,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:01:18,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:01:18,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:01:18,509 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:01:18,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 01:01:18,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:01:18,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:01:18,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:01:18,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:18,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:19,049 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:19,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481165094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:01:19,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1874591814] [2021-11-07 01:01:19,053 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 01:01:19,053 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:01:19,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:01:19,054 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:01:19,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:01:19,063 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:19,065 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:01:19,073 INFO L180 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-11-07 01:01:19,074 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:01:19,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:19,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:19,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:19,094 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.6 percent of original size [2021-11-07 01:01:19,097 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:01:19,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:19,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:19,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:19,117 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-07 01:01:19,120 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:01:19,127 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-07 01:01:19,131 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:01:19,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:19,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:19,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:19,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:19,156 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:01:19,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:01:19,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:01:19,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-07 01:01:19,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619750307] [2021-11-07 01:01:19,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 01:01:19,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:01:19,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 01:01:19,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=470, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:01:19,390 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:19,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:19,480 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-11-07 01:01:19,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:01:19,480 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 01:01:19,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:19,484 INFO L225 Difference]: With dead ends: 73 [2021-11-07 01:01:19,484 INFO L226 Difference]: Without dead ends: 72 [2021-11-07 01:01:19,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 78 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=470, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:01:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-07 01:01:19,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-07 01:01:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:19,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-11-07 01:01:19,503 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 35 [2021-11-07 01:01:19,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:19,504 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-11-07 01:01:19,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:19,504 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-11-07 01:01:19,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:01:19,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:19,507 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1] [2021-11-07 01:01:19,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:19,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:01:19,708 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-07 01:01:19,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:19,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1240792214, now seen corresponding path program 4 times [2021-11-07 01:01:19,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:01:19,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821324817] [2021-11-07 01:01:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:19,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:01:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:20,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:01:20,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821324817] [2021-11-07 01:01:20,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821324817] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:01:20,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383709512] [2021-11-07 01:01:20,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:01:20,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:01:20,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:01:20,084 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:01:20,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 01:01:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:20,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 01:01:20,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:20,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:21,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383709512] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:01:21,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127746363] [2021-11-07 01:01:21,650 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 01:01:21,650 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:01:21,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:01:21,651 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:01:21,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:01:21,655 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:21,657 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:01:21,661 INFO L180 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-11-07 01:01:21,663 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:01:21,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:21,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:21,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:21,678 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.6 percent of original size [2021-11-07 01:01:21,687 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:01:21,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:21,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:21,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:21,699 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-07 01:01:21,702 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:01:21,708 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-07 01:01:21,709 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:01:21,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:21,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:21,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:21,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:21,740 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:01:22,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:01:22,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:01:22,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-07 01:01:22,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16691488] [2021-11-07 01:01:22,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 01:01:22,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:01:22,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 01:01:22,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1138, Invalid=1514, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 01:01:22,285 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 48 states, 47 states have (on average 3.0) internal successors, (141), 48 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:22,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:22,503 INFO L93 Difference]: Finished difference Result 145 states and 168 transitions. [2021-11-07 01:01:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 01:01:22,504 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.0) internal successors, (141), 48 states have internal predecessors, (141), 0 states have call successors, (0), 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 71 [2021-11-07 01:01:22,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:22,506 INFO L225 Difference]: With dead ends: 145 [2021-11-07 01:01:22,507 INFO L226 Difference]: Without dead ends: 144 [2021-11-07 01:01:22,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 162 SyntacticMatches, 23 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1833 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1138, Invalid=1514, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 01:01:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-07 01:01:22,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-11-07 01:01:22,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.006993006993007) internal successors, (144), 143 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2021-11-07 01:01:22,525 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 71 [2021-11-07 01:01:22,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:22,526 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2021-11-07 01:01:22,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.0) internal successors, (141), 48 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:22,526 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2021-11-07 01:01:22,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 01:01:22,534 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:22,534 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1] [2021-11-07 01:01:22,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:22,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:01:22,761 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-07 01:01:22,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:22,761 INFO L85 PathProgramCache]: Analyzing trace with hash 437109738, now seen corresponding path program 5 times [2021-11-07 01:01:22,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:01:22,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598626199] [2021-11-07 01:01:22,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:22,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:01:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:23,976 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:01:23,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598626199] [2021-11-07 01:01:23,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598626199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:01:23,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995354422] [2021-11-07 01:01:23,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:01:23,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:01:23,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:01:23,978 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:01:24,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 01:01:24,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-07 01:01:24,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:01:24,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 01:01:24,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:24,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:27,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995354422] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:01:27,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419309990] [2021-11-07 01:01:27,777 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 01:01:27,778 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:01:27,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:01:27,778 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:01:27,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:01:27,785 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:27,788 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:01:27,792 INFO L180 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-11-07 01:01:27,794 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:01:27,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:27,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:27,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:27,810 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.6 percent of original size [2021-11-07 01:01:27,812 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:01:27,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:27,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:27,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:27,831 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-07 01:01:27,833 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:01:27,838 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-07 01:01:27,839 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:01:27,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:27,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:27,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:27,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:27,855 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:01:29,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:01:29,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:01:29,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-11-07 01:01:29,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280863449] [2021-11-07 01:01:29,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-07 01:01:29,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:01:29,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-07 01:01:29,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4570, Invalid=5330, Unknown=0, NotChecked=0, Total=9900 [2021-11-07 01:01:29,163 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand has 96 states, 95 states have (on average 3.0) internal successors, (285), 96 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:29,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:29,611 INFO L93 Difference]: Finished difference Result 289 states and 336 transitions. [2021-11-07 01:01:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-07 01:01:29,612 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 3.0) internal successors, (285), 96 states have internal predecessors, (285), 0 states have call successors, (0), 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 143 [2021-11-07 01:01:29,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:29,620 INFO L225 Difference]: With dead ends: 289 [2021-11-07 01:01:29,621 INFO L226 Difference]: Without dead ends: 288 [2021-11-07 01:01:29,625 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 330 SyntacticMatches, 47 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7137 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4570, Invalid=5330, Unknown=0, NotChecked=0, Total=9900 [2021-11-07 01:01:29,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-07 01:01:29,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2021-11-07 01:01:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.0034843205574913) internal successors, (288), 287 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 288 transitions. [2021-11-07 01:01:29,676 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 288 transitions. Word has length 143 [2021-11-07 01:01:29,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:29,677 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 288 transitions. [2021-11-07 01:01:29,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 3.0) internal successors, (285), 96 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:29,678 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 288 transitions. [2021-11-07 01:01:29,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-07 01:01:29,686 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:29,686 INFO L513 BasicCegarLoop]: trace histogram [95, 95, 94, 1, 1, 1] [2021-11-07 01:01:29,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:29,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 01:01:29,909 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-07 01:01:29,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:29,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1641167638, now seen corresponding path program 6 times [2021-11-07 01:01:29,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:01:29,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111007796] [2021-11-07 01:01:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:29,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:01:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 13395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:33,665 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:01:33,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111007796] [2021-11-07 01:01:33,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111007796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:01:33,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115127336] [2021-11-07 01:01:33,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:01:33,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:01:33,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:01:33,687 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:01:33,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 01:01:33,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:01:33,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:01:33,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-07 01:01:34,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 13395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:34,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 13395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:45,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115127336] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:01:45,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1399648390] [2021-11-07 01:01:45,574 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 01:01:45,574 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:01:45,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:01:45,575 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:01:45,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:01:45,580 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:45,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:01:45,588 INFO L180 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-11-07 01:01:45,589 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:01:45,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:45,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:45,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:45,604 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.6 percent of original size [2021-11-07 01:01:45,607 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:01:45,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:45,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:45,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:45,616 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-07 01:01:45,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:01:45,622 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-07 01:01:45,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:01:45,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:45,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:45,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:45,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:01:45,633 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:01:49,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:01:49,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:01:49,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2021-11-07 01:01:49,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901884228] [2021-11-07 01:01:49,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-07 01:01:49,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:01:49,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-07 01:01:49,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18346, Invalid=19874, Unknown=0, NotChecked=0, Total=38220 [2021-11-07 01:01:49,763 INFO L87 Difference]: Start difference. First operand 288 states and 288 transitions. Second operand has 192 states, 191 states have (on average 3.0) internal successors, (573), 192 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:51,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:51,102 INFO L93 Difference]: Finished difference Result 577 states and 672 transitions. [2021-11-07 01:01:51,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-07 01:01:51,102 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 3.0) internal successors, (573), 192 states have internal predecessors, (573), 0 states have call successors, (0), 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 287 [2021-11-07 01:01:51,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:51,105 INFO L225 Difference]: With dead ends: 577 [2021-11-07 01:01:51,106 INFO L226 Difference]: Without dead ends: 576 [2021-11-07 01:01:51,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 666 SyntacticMatches, 95 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28113 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=18346, Invalid=19874, Unknown=0, NotChecked=0, Total=38220 [2021-11-07 01:01:51,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-07 01:01:51,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2021-11-07 01:01:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 1.0017391304347827) internal successors, (576), 575 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 576 transitions. [2021-11-07 01:01:51,138 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 576 transitions. Word has length 287 [2021-11-07 01:01:51,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:51,139 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 576 transitions. [2021-11-07 01:01:51,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 3.0) internal successors, (573), 192 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:51,140 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 576 transitions. [2021-11-07 01:01:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2021-11-07 01:01:51,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:51,156 INFO L513 BasicCegarLoop]: trace histogram [191, 191, 190, 1, 1, 1] [2021-11-07 01:01:51,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:51,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:01:51,373 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-07 01:01:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:51,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1154991850, now seen corresponding path program 7 times [2021-11-07 01:01:51,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:01:51,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041260449] [2021-11-07 01:01:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:51,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:01:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 54435 backedges. 0 proven. 54435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:05,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:02:05,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041260449] [2021-11-07 01:02:05,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041260449] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:02:05,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427289892] [2021-11-07 01:02:05,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:02:05,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:02:05,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:02:05,310 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:02:05,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 01:02:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:05,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-07 01:02:05,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 54435 backedges. 0 proven. 54435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:07,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 54435 backedges. 0 proven. 54435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:48,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427289892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:02:48,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [580751162] [2021-11-07 01:02:48,101 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 01:02:48,101 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:02:48,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:02:48,102 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:02:48,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:02:48,122 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:02:48,124 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:02:48,129 INFO L180 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-11-07 01:02:48,131 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:02:48,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:02:48,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:02:48,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:02:48,145 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.6 percent of original size [2021-11-07 01:02:48,147 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:02:48,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:02:48,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:02:48,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:02:48,160 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-07 01:02:48,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:02:48,165 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-07 01:02:48,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:02:48,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:02:48,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:02:48,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:02:48,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:02:48,179 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:03:06,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:03:06,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:03:06,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2021-11-07 01:03:06,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281873732] [2021-11-07 01:03:06,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-07 01:03:06,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:06,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-07 01:03:06,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73546, Invalid=76610, Unknown=0, NotChecked=0, Total=150156 [2021-11-07 01:03:06,857 INFO L87 Difference]: Start difference. First operand 576 states and 576 transitions. Second operand has 384 states, 383 states have (on average 3.0) internal successors, (1149), 384 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:13,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:13,269 INFO L93 Difference]: Finished difference Result 1153 states and 1344 transitions. [2021-11-07 01:03:13,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-07 01:03:13,270 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 383 states have (on average 3.0) internal successors, (1149), 384 states have internal predecessors, (1149), 0 states have call successors, (0), 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 575 [2021-11-07 01:03:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:13,279 INFO L225 Difference]: With dead ends: 1153 [2021-11-07 01:03:13,279 INFO L226 Difference]: Without dead ends: 1152 [2021-11-07 01:03:13,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1915 GetRequests, 1338 SyntacticMatches, 191 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111537 ImplicationChecksByTransitivity, 70.1s TimeCoverageRelationStatistics Valid=73546, Invalid=76610, Unknown=0, NotChecked=0, Total=150156 [2021-11-07 01:03:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-11-07 01:03:13,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1152. [2021-11-07 01:03:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 1.000868809730669) internal successors, (1152), 1151 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:13,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1152 transitions. [2021-11-07 01:03:13,340 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1152 transitions. Word has length 575 [2021-11-07 01:03:13,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:13,342 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 1152 transitions. [2021-11-07 01:03:13,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 383 states have (on average 3.0) internal successors, (1149), 384 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:13,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1152 transitions. [2021-11-07 01:03:13,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1152 [2021-11-07 01:03:13,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:13,418 INFO L513 BasicCegarLoop]: trace histogram [383, 383, 382, 1, 1, 1] [2021-11-07 01:03:13,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:13,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-07 01:03:13,633 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-07 01:03:13,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:13,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2077477610, now seen corresponding path program 8 times [2021-11-07 01:03:13,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:13,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842058759] [2021-11-07 01:03:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:13,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 219459 backedges. 0 proven. 219459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:19,216 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:19,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842058759] [2021-11-07 01:04:19,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842058759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:04:19,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871709716] [2021-11-07 01:04:19,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:04:19,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:04:19,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:04:19,220 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:04:19,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 01:04:22,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 383 check-sat command(s) [2021-11-07 01:04:22,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:04:22,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 1924 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-07 01:04:22,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 219459 backedges. 0 proven. 219459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:26,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:07:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 219459 backedges. 0 proven. 219459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:39,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871709716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:07:39,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83433433] [2021-11-07 01:07:39,882 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 01:07:39,883 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:07:39,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:07:39,883 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:07:39,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:07:39,887 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:07:39,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-07 01:07:39,892 INFO L180 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-11-07 01:07:39,894 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:07:39,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:07:39,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:07:39,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:07:39,906 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.6 percent of original size [2021-11-07 01:07:39,908 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:07:39,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:07:39,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:07:39,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:07:39,919 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-07 01:07:39,921 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:07:39,924 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-07 01:07:39,926 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:07:39,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:07:39,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:07:39,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:07:39,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:07:39,937 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:08:44,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:08:44,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:08:44,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 767 [2021-11-07 01:08:44,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970254822] [2021-11-07 01:08:44,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2021-11-07 01:08:44,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:08:44,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2021-11-07 01:08:44,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294538, Invalid=300674, Unknown=0, NotChecked=0, Total=595212 [2021-11-07 01:08:44,794 INFO L87 Difference]: Start difference. First operand 1152 states and 1152 transitions. Second operand has 768 states, 767 states have (on average 3.0) internal successors, (2301), 768 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:21,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:21,167 INFO L93 Difference]: Finished difference Result 2305 states and 2688 transitions. [2021-11-07 01:09:21,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2021-11-07 01:09:21,169 INFO L78 Accepts]: Start accepts. Automaton has has 768 states, 767 states have (on average 3.0) internal successors, (2301), 768 states have internal predecessors, (2301), 0 states have call successors, (0), 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 1151 [2021-11-07 01:09:21,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:21,184 INFO L225 Difference]: With dead ends: 2305 [2021-11-07 01:09:21,184 INFO L226 Difference]: Without dead ends: 2304 [2021-11-07 01:09:21,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3835 GetRequests, 2682 SyntacticMatches, 383 SemanticMatches, 770 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444273 ImplicationChecksByTransitivity, 317.1s TimeCoverageRelationStatistics Valid=294538, Invalid=300674, Unknown=0, NotChecked=0, Total=595212 [2021-11-07 01:09:21,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-11-07 01:09:21,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2304. [2021-11-07 01:09:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 1.0004342162396873) internal successors, (2304), 2303 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:21,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 2304 transitions. [2021-11-07 01:09:21,300 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 2304 transitions. Word has length 1151 [2021-11-07 01:09:21,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:21,303 INFO L470 AbstractCegarLoop]: Abstraction has 2304 states and 2304 transitions. [2021-11-07 01:09:21,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 768 states, 767 states have (on average 3.0) internal successors, (2301), 768 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 2304 transitions. [2021-11-07 01:09:21,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2304 [2021-11-07 01:09:21,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:21,330 INFO L513 BasicCegarLoop]: trace histogram [767, 767, 766, 1, 1, 1] [2021-11-07 01:09:21,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:21,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65dd4403-e7db-47e2-8499-e6c83263eb0b/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-07 01:09:21,533 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-07 01:09:21,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:21,534 INFO L85 PathProgramCache]: Analyzing trace with hash 275501802, now seen corresponding path program 9 times [2021-11-07 01:09:21,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:09:21,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558066485] [2021-11-07 01:09:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:21,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:09:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat