./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/ChawdharyCookGulwaniSagivYang-ESOP2008-random2d.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/ChawdharyCookGulwaniSagivYang-ESOP2008-random2d.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF --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 ef201cd54bcdc81a1760f6e60d88bd9cc04c6c00c0d7306b10fb5fb0b61b4e06 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:06:35,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:06:35,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:06:35,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:06:35,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:06:35,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:06:35,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:06:35,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:06:35,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:06:35,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:06:35,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:06:35,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:06:35,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:06:35,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:06:35,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:06:35,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:06:35,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:06:35,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:06:35,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:06:35,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:06:35,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:06:35,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:06:35,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:06:35,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:06:35,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:06:35,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:06:35,657 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:06:35,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:06:35,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:06:35,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:06:35,660 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:06:35,661 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:06:35,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:06:35,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:06:35,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:06:35,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:06:35,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:06:35,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:06:35,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:06:35,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:06:35,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:06:35,668 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-12 23:06:35,692 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:06:35,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:06:35,693 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:06:35,693 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:06:35,693 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:06:35,693 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:06:35,694 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:06:35,694 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:06:35,694 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:06:35,694 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:06:35,695 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:06:35,695 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:06:35,695 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:06:35,695 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:06:35,695 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:06:35,696 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:06:35,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:06:35,697 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-12 23:06:35,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:06:35,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:06:35,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:06:35,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:06:35,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:06:35,698 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-12 23:06:35,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:06:35,699 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:06:35,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:06:35,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:06:35,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:06:35,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:06:35,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:06:35,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:06:35,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:06:35,700 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:06:35,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:06:35,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:06:35,701 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:06:35,701 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:06:35,702 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_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef201cd54bcdc81a1760f6e60d88bd9cc04c6c00c0d7306b10fb5fb0b61b4e06 [2021-11-12 23:06:35,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:06:35,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:06:35,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:06:35,988 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:06:35,989 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:06:35,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/termination-crafted-lit/ChawdharyCookGulwaniSagivYang-ESOP2008-random2d.c [2021-11-12 23:06:36,080 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/data/bcc969bb5/f875cdcbcbff41d59d971a958b26e21d/FLAG881400cde [2021-11-12 23:06:36,605 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:06:36,606 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/sv-benchmarks/c/termination-crafted-lit/ChawdharyCookGulwaniSagivYang-ESOP2008-random2d.c [2021-11-12 23:06:36,616 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/data/bcc969bb5/f875cdcbcbff41d59d971a958b26e21d/FLAG881400cde [2021-11-12 23:06:36,987 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/data/bcc969bb5/f875cdcbcbff41d59d971a958b26e21d [2021-11-12 23:06:36,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:06:36,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:06:36,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:06:36,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:06:36,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:06:36,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:06:36" (1/1) ... [2021-11-12 23:06:36,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4902b399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:36, skipping insertion in model container [2021-11-12 23:06:36,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:06:36" (1/1) ... [2021-11-12 23:06:37,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:06:37,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:06:37,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:06:37,196 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:06:37,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:06:37,234 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:06:37,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:37 WrapperNode [2021-11-12 23:06:37,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:06:37,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:06:37,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:06:37,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:06:37,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:37" (1/1) ... [2021-11-12 23:06:37,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:37" (1/1) ... [2021-11-12 23:06:37,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:06:37,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:06:37,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:06:37,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:06:37,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:37" (1/1) ... [2021-11-12 23:06:37,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:37" (1/1) ... [2021-11-12 23:06:37,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:37" (1/1) ... [2021-11-12 23:06:37,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:37" (1/1) ... [2021-11-12 23:06:37,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:37" (1/1) ... [2021-11-12 23:06:37,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:37" (1/1) ... [2021-11-12 23:06:37,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:37" (1/1) ... [2021-11-12 23:06:37,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:06:37,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:06:37,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:06:37,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:06:37,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:37" (1/1) ... [2021-11-12 23:06:37,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:06:37,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:37,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:06:37,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:06:37,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:06:37,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:06:37,625 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:06:37,625 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:06:37,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:06:37 BoogieIcfgContainer [2021-11-12 23:06:37,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:06:37,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:06:37,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:06:37,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:06:37,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:06:36" (1/3) ... [2021-11-12 23:06:37,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a7977b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:06:37, skipping insertion in model container [2021-11-12 23:06:37,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:37" (2/3) ... [2021-11-12 23:06:37,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a7977b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:06:37, skipping insertion in model container [2021-11-12 23:06:37,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:06:37" (3/3) ... [2021-11-12 23:06:37,636 INFO L111 eAbstractionObserver]: Analyzing ICFG ChawdharyCookGulwaniSagivYang-ESOP2008-random2d.c [2021-11-12 23:06:37,642 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:06:37,642 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-12 23:06:37,700 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:06:37,716 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 [2021-11-12 23:06:37,716 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-12 23:06:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 27 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) [2021-11-12 23:06:37,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-12 23:06:37,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:37,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-12 23:06:37,742 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:37,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:37,748 INFO L85 PathProgramCache]: Analyzing trace with hash 94531, now seen corresponding path program 1 times [2021-11-12 23:06:37,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:37,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888880360] [2021-11-12 23:06:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:37,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:37,940 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:37,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888880360] [2021-11-12 23:06:37,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888880360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:37,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:37,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-12 23:06:37,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427376310] [2021-11-12 23:06:37,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:37,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:06:37,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:06:38,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:06:38,009 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-11-12 23:06:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:38,052 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-11-12 23:06:38,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:06:38,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2021-11-12 23:06:38,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:38,086 INFO L225 Difference]: With dead ends: 33 [2021-11-12 23:06:38,087 INFO L226 Difference]: Without dead ends: 30 [2021-11-12 23:06:38,090 INFO L932 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 [2021-11-12 23:06:38,095 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.31ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:38,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 12 Unknown, 0 Unchecked, 1.31ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 21.86ms Time] [2021-11-12 23:06:38,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-12 23:06:38,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-11-12 23:06:38,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 28 states have internal predecessors, (34), 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) [2021-11-12 23:06:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-11-12 23:06:38,136 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 3 [2021-11-12 23:06:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:38,137 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-11-12 23:06:38,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-11-12 23:06:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-11-12 23:06:38,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 23:06:38,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:38,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 23:06:38,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:06:38,139 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:38,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:38,141 INFO L85 PathProgramCache]: Analyzing trace with hash 2930506, now seen corresponding path program 1 times [2021-11-12 23:06:38,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:38,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110838129] [2021-11-12 23:06:38,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:38,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:38,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:38,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110838129] [2021-11-12 23:06:38,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110838129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:38,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:38,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-12 23:06:38,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823996467] [2021-11-12 23:06:38,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:38,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:06:38,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:38,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:06:38,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:06:38,179 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. 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) [2021-11-12 23:06:38,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:38,191 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-11-12 23:06:38,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:06:38,192 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 [2021-11-12 23:06:38,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:38,193 INFO L225 Difference]: With dead ends: 29 [2021-11-12 23:06:38,193 INFO L226 Difference]: Without dead ends: 28 [2021-11-12 23:06:38,193 INFO L932 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 [2021-11-12 23:06:38,195 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.92ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:38,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 26 Invalid, 6 Unknown, 0 Unchecked, 0.92ms Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 7.34ms Time] [2021-11-12 23:06:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-12 23:06:38,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-12 23:06:38,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.736842105263158) internal successors, (33), 27 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) [2021-11-12 23:06:38,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-12 23:06:38,201 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 4 [2021-11-12 23:06:38,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:38,202 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-12 23:06:38,202 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) [2021-11-12 23:06:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-12 23:06:38,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:06:38,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:38,203 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:06:38,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:06:38,203 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:38,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:38,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1403406088, now seen corresponding path program 1 times [2021-11-12 23:06:38,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:38,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653672759] [2021-11-12 23:06:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:38,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:38,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:38,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653672759] [2021-11-12 23:06:38,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653672759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:38,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:38,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-12 23:06:38,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257821164] [2021-11-12 23:06:38,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:38,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:06:38,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:38,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:06:38,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:06:38,231 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:06:38,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:38,270 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-11-12 23:06:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:06:38,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-12 23:06:38,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:38,272 INFO L225 Difference]: With dead ends: 51 [2021-11-12 23:06:38,273 INFO L226 Difference]: Without dead ends: 49 [2021-11-12 23:06:38,273 INFO L932 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 [2021-11-12 23:06:38,275 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.45ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:38,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 17 Unknown, 0 Unchecked, 1.45ms Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 28.40ms Time] [2021-11-12 23:06:38,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-12 23:06:38,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-11-12 23:06:38,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 42 states have internal predecessors, (59), 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) [2021-11-12 23:06:38,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 59 transitions. [2021-11-12 23:06:38,284 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 59 transitions. Word has length 7 [2021-11-12 23:06:38,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:38,284 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 59 transitions. [2021-11-12 23:06:38,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:06:38,285 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 59 transitions. [2021-11-12 23:06:38,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:06:38,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:38,286 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-11-12 23:06:38,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:06:38,286 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:38,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:38,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1403443247, now seen corresponding path program 1 times [2021-11-12 23:06:38,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:38,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203931425] [2021-11-12 23:06:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:38,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:38,329 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:38,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203931425] [2021-11-12 23:06:38,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203931425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:38,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430839510] [2021-11-12 23:06:38,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:38,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:38,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:38,338 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:06:38,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:06:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:38,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:38,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:38,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:38,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430839510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:06:38,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1319632089] [2021-11-12 23:06:38,551 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-12 23:06:38,551 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:06:38,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:06:38,561 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:06:38,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:06:38,597 INFO L180 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size [2021-11-12 23:06:38,604 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-12 23:06:38,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:38,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:38,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:38,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:38,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:38,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:38,708 INFO L180 QuantifierPusher]: treesize reduction 23, result has 58.9 percent of original size [2021-11-12 23:06:38,721 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:38,733 INFO L180 QuantifierPusher]: treesize reduction 23, result has 58.9 percent of original size [2021-11-12 23:06:38,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:38,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:38,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:38,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:38,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:38,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:38,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:38,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:38,816 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:06:39,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:06:39,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:06:39,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-11-12 23:06:39,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179512196] [2021-11-12 23:06:39,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:06:39,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:06:39,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:39,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:06:39,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:06:39,070 INFO L87 Difference]: Start difference. First operand 43 states and 59 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:06:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:39,146 INFO L93 Difference]: Finished difference Result 146 states and 202 transitions. [2021-11-12 23:06:39,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:06:39,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-12 23:06:39,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:39,149 INFO L225 Difference]: With dead ends: 146 [2021-11-12 23:06:39,149 INFO L226 Difference]: Without dead ends: 145 [2021-11-12 23:06:39,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:06:39,153 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 152 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.20ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.20ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:39,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 131 Invalid, 21 Unknown, 0 Unchecked, 3.20ms Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 51.20ms Time] [2021-11-12 23:06:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-12 23:06:39,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 123. [2021-11-12 23:06:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 114 states have (on average 1.719298245614035) internal successors, (196), 122 states have internal predecessors, (196), 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) [2021-11-12 23:06:39,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 196 transitions. [2021-11-12 23:06:39,178 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 196 transitions. Word has length 7 [2021-11-12 23:06:39,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:39,178 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 196 transitions. [2021-11-12 23:06:39,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:06:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 196 transitions. [2021-11-12 23:06:39,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:06:39,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:39,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:06:39,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:39,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:39,380 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:39,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:39,382 INFO L85 PathProgramCache]: Analyzing trace with hash 555915823, now seen corresponding path program 1 times [2021-11-12 23:06:39,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:39,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698689897] [2021-11-12 23:06:39,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:39,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:39,410 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:39,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698689897] [2021-11-12 23:06:39,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698689897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:39,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:39,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-12 23:06:39,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423117740] [2021-11-12 23:06:39,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:39,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:06:39,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:39,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:06:39,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:06:39,413 INFO L87 Difference]: Start difference. First operand 123 states and 196 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:06:39,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:39,440 INFO L93 Difference]: Finished difference Result 212 states and 337 transitions. [2021-11-12 23:06:39,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:06:39,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 23:06:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:39,444 INFO L225 Difference]: With dead ends: 212 [2021-11-12 23:06:39,444 INFO L226 Difference]: Without dead ends: 210 [2021-11-12 23:06:39,444 INFO L932 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 [2021-11-12 23:06:39,446 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.75ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.20ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:39,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 46 Invalid, 17 Unknown, 0 Unchecked, 0.75ms Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 16.20ms Time] [2021-11-12 23:06:39,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-12 23:06:39,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 205. [2021-11-12 23:06:39,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 196 states have (on average 1.663265306122449) internal successors, (326), 204 states have internal predecessors, (326), 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) [2021-11-12 23:06:39,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 326 transitions. [2021-11-12 23:06:39,469 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 326 transitions. Word has length 8 [2021-11-12 23:06:39,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:39,470 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 326 transitions. [2021-11-12 23:06:39,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:06:39,470 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 326 transitions. [2021-11-12 23:06:39,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 23:06:39,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:39,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:06:39,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-12 23:06:39,472 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:39,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:39,472 INFO L85 PathProgramCache]: Analyzing trace with hash 53713073, now seen corresponding path program 1 times [2021-11-12 23:06:39,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:39,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480383937] [2021-11-12 23:06:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:39,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:39,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:39,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480383937] [2021-11-12 23:06:39,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480383937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:39,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:39,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-12 23:06:39,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407628810] [2021-11-12 23:06:39,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:39,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:06:39,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:39,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:06:39,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:06:39,495 INFO L87 Difference]: Start difference. First operand 205 states and 326 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2021-11-12 23:06:39,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:39,524 INFO L93 Difference]: Finished difference Result 345 states and 546 transitions. [2021-11-12 23:06:39,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:06:39,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) Word has length 9 [2021-11-12 23:06:39,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:39,528 INFO L225 Difference]: With dead ends: 345 [2021-11-12 23:06:39,528 INFO L226 Difference]: Without dead ends: 343 [2021-11-12 23:06:39,529 INFO L932 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 [2021-11-12 23:06:39,530 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.65ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:39,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 46 Invalid, 17 Unknown, 0 Unchecked, 0.65ms Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 15.33ms Time] [2021-11-12 23:06:39,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-12 23:06:39,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 330. [2021-11-12 23:06:39,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 321 states have (on average 1.5763239875389408) internal successors, (506), 329 states have internal predecessors, (506), 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) [2021-11-12 23:06:39,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 506 transitions. [2021-11-12 23:06:39,564 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 506 transitions. Word has length 9 [2021-11-12 23:06:39,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:39,565 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 506 transitions. [2021-11-12 23:06:39,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2021-11-12 23:06:39,565 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 506 transitions. [2021-11-12 23:06:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-12 23:06:39,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:39,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:06:39,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-12 23:06:39,566 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:39,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:39,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1665105336, now seen corresponding path program 1 times [2021-11-12 23:06:39,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:39,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514158259] [2021-11-12 23:06:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:39,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:39,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:39,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:39,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514158259] [2021-11-12 23:06:39,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514158259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:39,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:39,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-12 23:06:39,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696000792] [2021-11-12 23:06:39,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:39,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:06:39,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:39,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:06:39,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:06:39,589 INFO L87 Difference]: Start difference. First operand 330 states and 506 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-11-12 23:06:39,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:39,624 INFO L93 Difference]: Finished difference Result 549 states and 840 transitions. [2021-11-12 23:06:39,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:06:39,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) Word has length 10 [2021-11-12 23:06:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:39,630 INFO L225 Difference]: With dead ends: 549 [2021-11-12 23:06:39,630 INFO L226 Difference]: Without dead ends: 547 [2021-11-12 23:06:39,631 INFO L932 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 [2021-11-12 23:06:39,632 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.63ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:39,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 46 Invalid, 17 Unknown, 0 Unchecked, 0.63ms Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 15.17ms Time] [2021-11-12 23:06:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-12 23:06:39,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 542. [2021-11-12 23:06:39,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 533 states have (on average 1.5159474671669793) internal successors, (808), 541 states have internal predecessors, (808), 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) [2021-11-12 23:06:39,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 808 transitions. [2021-11-12 23:06:39,738 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 808 transitions. Word has length 10 [2021-11-12 23:06:39,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:39,739 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 808 transitions. [2021-11-12 23:06:39,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-11-12 23:06:39,739 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 808 transitions. [2021-11-12 23:06:39,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:06:39,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:39,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-12 23:06:39,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-12 23:06:39,741 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:39,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:39,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1107964330, now seen corresponding path program 1 times [2021-11-12 23:06:39,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:39,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801537759] [2021-11-12 23:06:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:39,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:39,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:39,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801537759] [2021-11-12 23:06:39,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801537759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:39,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090680802] [2021-11-12 23:06:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:39,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:39,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:39,817 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:06:39,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:06:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:39,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:39,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:39,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:39,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090680802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:06:39,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [571100850] [2021-11-12 23:06:39,970 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:06:39,971 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:06:39,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:06:39,971 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:06:39,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:06:39,983 INFO L180 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size [2021-11-12 23:06:39,987 INFO L185 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size 21 [2021-11-12 23:06:39,990 INFO L180 QuantifierPusher]: treesize reduction 25, result has 46.8 percent of original size [2021-11-12 23:06:39,992 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:06:40,005 INFO L180 QuantifierPusher]: treesize reduction 8, result has 81.8 percent of original size [2021-11-12 23:06:40,009 INFO L185 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size 21 [2021-11-12 23:06:40,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,042 INFO L180 QuantifierPusher]: treesize reduction 39, result has 62.1 percent of original size [2021-11-12 23:06:40,046 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-12 23:06:40,052 INFO L180 QuantifierPusher]: treesize reduction 9, result has 90.0 percent of original size [2021-11-12 23:06:40,075 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-11-12 23:06:40,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,150 INFO L180 QuantifierPusher]: treesize reduction 23, result has 52.1 percent of original size [2021-11-12 23:06:40,152 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-12 23:06:40,155 INFO L180 QuantifierPusher]: treesize reduction 5, result has 89.4 percent of original size [2021-11-12 23:06:40,158 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:06:40,164 INFO L180 QuantifierPusher]: treesize reduction 23, result has 52.1 percent of original size [2021-11-12 23:06:40,166 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-12 23:06:40,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:40,220 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:40,229 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:06:40,233 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:40,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-11-12 23:06:40,244 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 161 [2021-11-12 23:06:40,248 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:06:40,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:06:40,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:06:40,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-11-12 23:06:40,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708136726] [2021-11-12 23:06:40,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:06:40,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:06:40,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:40,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:06:40,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:06:40,782 INFO L87 Difference]: Start difference. First operand 542 states and 808 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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) [2021-11-12 23:06:40,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:40,861 INFO L93 Difference]: Finished difference Result 1046 states and 1607 transitions. [2021-11-12 23:06:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:06:40,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 14 [2021-11-12 23:06:40,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:40,873 INFO L225 Difference]: With dead ends: 1046 [2021-11-12 23:06:40,873 INFO L226 Difference]: Without dead ends: 1044 [2021-11-12 23:06:40,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:06:40,876 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 122 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.04ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:40,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 112 Invalid, 50 Unknown, 0 Unchecked, 6.04ms Time], IncrementalHoareTripleChecker [24 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 43.77ms Time] [2021-11-12 23:06:40,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-11-12 23:06:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 903. [2021-11-12 23:06:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 894 states have (on average 1.5279642058165548) internal successors, (1366), 902 states have internal predecessors, (1366), 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) [2021-11-12 23:06:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1366 transitions. [2021-11-12 23:06:40,991 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1366 transitions. Word has length 14 [2021-11-12 23:06:40,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:40,993 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 1366 transitions. [2021-11-12 23:06:40,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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) [2021-11-12 23:06:40,993 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1366 transitions. [2021-11-12 23:06:40,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-12 23:06:40,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:40,998 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:06:41,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:41,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:41,221 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:41,221 INFO L85 PathProgramCache]: Analyzing trace with hash 953294341, now seen corresponding path program 1 times [2021-11-12 23:06:41,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:41,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855113183] [2021-11-12 23:06:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:41,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:41,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:41,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855113183] [2021-11-12 23:06:41,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855113183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:41,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596201464] [2021-11-12 23:06:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:41,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:41,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:41,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:06:41,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:06:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:41,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:41,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:41,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:41,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596201464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:06:41,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [94548616] [2021-11-12 23:06:41,411 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-12 23:06:41,411 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:06:41,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:06:41,412 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:06:41,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:06:41,420 INFO L180 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size [2021-11-12 23:06:41,423 INFO L185 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size 21 [2021-11-12 23:06:41,431 INFO L180 QuantifierPusher]: treesize reduction 29, result has 43.1 percent of original size [2021-11-12 23:06:41,434 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-12 23:06:41,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:41,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:41,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:41,460 INFO L180 QuantifierPusher]: treesize reduction 5, result has 93.9 percent of original size [2021-11-12 23:06:41,471 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:06:41,480 INFO L180 QuantifierPusher]: treesize reduction 25, result has 75.0 percent of original size [2021-11-12 23:06:41,489 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:06:41,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:41,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:41,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:41,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:41,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:41,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:41,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:41,522 INFO L180 QuantifierPusher]: treesize reduction 17, result has 66.0 percent of original size [2021-11-12 23:06:41,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:41,529 INFO L180 QuantifierPusher]: treesize reduction 21, result has 58.8 percent of original size [2021-11-12 23:06:41,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:06:41,536 INFO L180 QuantifierPusher]: treesize reduction 17, result has 66.0 percent of original size [2021-11-12 23:06:41,540 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:41,547 INFO L180 QuantifierPusher]: treesize reduction 21, result has 58.8 percent of original size [2021-11-12 23:06:41,552 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:06:41,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:41,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:41,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:41,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:41,570 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:06:41,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:06:41,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:06:41,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-11-12 23:06:41,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355279008] [2021-11-12 23:06:41,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:06:41,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:06:41,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:41,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:06:41,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:06:41,879 INFO L87 Difference]: Start difference. First operand 903 states and 1366 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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) [2021-11-12 23:06:41,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:41,931 INFO L93 Difference]: Finished difference Result 1364 states and 2105 transitions. [2021-11-12 23:06:41,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:06:41,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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 16 [2021-11-12 23:06:41,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:41,940 INFO L225 Difference]: With dead ends: 1364 [2021-11-12 23:06:41,940 INFO L226 Difference]: Without dead ends: 1362 [2021-11-12 23:06:41,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:06:41,942 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 84 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.68ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:41,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 66 Invalid, 32 Unknown, 0 Unchecked, 0.68ms Time], IncrementalHoareTripleChecker [16 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 28.74ms Time] [2021-11-12 23:06:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-11-12 23:06:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1060. [2021-11-12 23:06:41,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1052 states have (on average 1.518060836501901) internal successors, (1597), 1059 states have internal predecessors, (1597), 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) [2021-11-12 23:06:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1597 transitions. [2021-11-12 23:06:41,979 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1597 transitions. Word has length 16 [2021-11-12 23:06:41,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:41,979 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 1597 transitions. [2021-11-12 23:06:41,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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) [2021-11-12 23:06:41,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1597 transitions. [2021-11-12 23:06:41,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-12 23:06:41,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:41,998 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-12 23:06:42,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:42,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-12 23:06:42,221 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:42,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:42,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2065182968, now seen corresponding path program 1 times [2021-11-12 23:06:42,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:42,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112939360] [2021-11-12 23:06:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:42,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:42,256 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:42,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112939360] [2021-11-12 23:06:42,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112939360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:42,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297883393] [2021-11-12 23:06:42,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:42,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:42,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:42,261 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:06:42,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:06:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:42,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:42,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:42,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:42,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297883393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:06:42,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [929035285] [2021-11-12 23:06:42,390 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-12 23:06:42,390 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:06:42,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:06:42,390 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:06:42,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:06:42,404 INFO L180 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size [2021-11-12 23:06:42,407 INFO L185 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size 21 [2021-11-12 23:06:42,412 INFO L180 QuantifierPusher]: treesize reduction 33, result has 40.0 percent of original size [2021-11-12 23:06:42,414 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-12 23:06:42,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:42,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:42,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:42,443 INFO L180 QuantifierPusher]: treesize reduction 7, result has 91.5 percent of original size [2021-11-12 23:06:42,448 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:06:42,454 INFO L180 QuantifierPusher]: treesize reduction 31, result has 69.6 percent of original size [2021-11-12 23:06:42,458 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-11-12 23:06:42,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:42,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:42,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:42,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:42,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:42,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:42,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:42,481 INFO L180 QuantifierPusher]: treesize reduction 17, result has 66.0 percent of original size [2021-11-12 23:06:42,484 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:42,487 INFO L180 QuantifierPusher]: treesize reduction 27, result has 50.9 percent of original size [2021-11-12 23:06:42,489 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-12 23:06:42,493 INFO L180 QuantifierPusher]: treesize reduction 17, result has 66.0 percent of original size [2021-11-12 23:06:42,496 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:42,506 INFO L180 QuantifierPusher]: treesize reduction 27, result has 50.9 percent of original size [2021-11-12 23:06:42,508 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-12 23:06:42,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:42,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:42,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:42,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:42,523 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:06:42,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:06:42,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:06:42,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-11-12 23:06:42,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125847986] [2021-11-12 23:06:42,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:06:42,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:06:42,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:42,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:06:42,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:06:42,850 INFO L87 Difference]: Start difference. First operand 1060 states and 1597 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 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) [2021-11-12 23:06:42,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:42,924 INFO L93 Difference]: Finished difference Result 2461 states and 3871 transitions. [2021-11-12 23:06:42,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:06:42,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 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) Word has length 18 [2021-11-12 23:06:42,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:42,944 INFO L225 Difference]: With dead ends: 2461 [2021-11-12 23:06:42,944 INFO L226 Difference]: Without dead ends: 2459 [2021-11-12 23:06:42,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:06:42,948 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 102 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.88ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:42,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 107 Invalid, 49 Unknown, 0 Unchecked, 0.88ms Time], IncrementalHoareTripleChecker [23 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 35.08ms Time] [2021-11-12 23:06:42,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-11-12 23:06:43,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2129. [2021-11-12 23:06:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2121 states have (on average 1.5223950966525224) internal successors, (3229), 2128 states have internal predecessors, (3229), 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) [2021-11-12 23:06:43,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 3229 transitions. [2021-11-12 23:06:43,033 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 3229 transitions. Word has length 18 [2021-11-12 23:06:43,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:43,033 INFO L470 AbstractCegarLoop]: Abstraction has 2129 states and 3229 transitions. [2021-11-12 23:06:43,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 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) [2021-11-12 23:06:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 3229 transitions. [2021-11-12 23:06:43,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-12 23:06:43,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:43,035 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1] [2021-11-12 23:06:43,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:43,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-12 23:06:43,261 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:43,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:43,261 INFO L85 PathProgramCache]: Analyzing trace with hash -492631821, now seen corresponding path program 2 times [2021-11-12 23:06:43,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:43,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603503122] [2021-11-12 23:06:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:43,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:06:43,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:43,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603503122] [2021-11-12 23:06:43,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603503122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:43,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091318132] [2021-11-12 23:06:43,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:06:43,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:43,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:43,296 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:06:43,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:06:43,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-12 23:06:43,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:06:43,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:43,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:06:43,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:06:43,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091318132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:06:43,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [206635781] [2021-11-12 23:06:43,431 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-12 23:06:43,431 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:06:43,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:06:43,431 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:06:43,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:06:43,436 INFO L180 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size [2021-11-12 23:06:43,439 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-12 23:06:43,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:43,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:43,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:43,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:43,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:43,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:43,453 INFO L180 QuantifierPusher]: treesize reduction 23, result has 58.9 percent of original size [2021-11-12 23:06:43,459 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:43,464 INFO L180 QuantifierPusher]: treesize reduction 23, result has 58.9 percent of original size [2021-11-12 23:06:43,466 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:43,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:43,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:43,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:43,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:43,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:43,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:43,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:43,480 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:06:43,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:06:43,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:06:43,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-11-12 23:06:43,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398749095] [2021-11-12 23:06:43,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:06:43,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:06:43,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:43,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:06:43,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:06:43,604 INFO L87 Difference]: Start difference. First operand 2129 states and 3229 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:06:43,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:43,655 INFO L93 Difference]: Finished difference Result 2129 states and 3229 transitions. [2021-11-12 23:06:43,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:06:43,656 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-12 23:06:43,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:43,668 INFO L225 Difference]: With dead ends: 2129 [2021-11-12 23:06:43,668 INFO L226 Difference]: Without dead ends: 2128 [2021-11-12 23:06:43,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:06:43,671 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 51 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.47ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:43,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 50 Invalid, 8 Unknown, 0 Unchecked, 0.47ms Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 4.99ms Time] [2021-11-12 23:06:43,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2021-11-12 23:06:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 1798. [2021-11-12 23:06:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1791 states have (on average 1.4874371859296482) internal successors, (2664), 1797 states have internal predecessors, (2664), 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) [2021-11-12 23:06:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2664 transitions. [2021-11-12 23:06:43,729 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2664 transitions. Word has length 19 [2021-11-12 23:06:43,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:43,729 INFO L470 AbstractCegarLoop]: Abstraction has 1798 states and 2664 transitions. [2021-11-12 23:06:43,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:06:43,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2664 transitions. [2021-11-12 23:06:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-12 23:06:43,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:43,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:06:43,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:43,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:43,957 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:43,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:43,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1112024197, now seen corresponding path program 1 times [2021-11-12 23:06:43,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:43,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347952352] [2021-11-12 23:06:43,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:43,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:43,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:43,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347952352] [2021-11-12 23:06:43,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347952352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:43,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288509413] [2021-11-12 23:06:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:43,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:43,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:43,980 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:06:44,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 23:06:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:44,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:44,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:44,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:44,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288509413] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:06:44,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [965083454] [2021-11-12 23:06:44,118 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-12 23:06:44,118 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:06:44,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:06:44,119 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:06:44,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:06:44,127 INFO L180 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size [2021-11-12 23:06:44,136 INFO L185 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size 21 [2021-11-12 23:06:44,155 INFO L180 QuantifierPusher]: treesize reduction 37, result has 37.3 percent of original size [2021-11-12 23:06:44,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-12 23:06:44,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:44,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:44,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:44,167 INFO L180 QuantifierPusher]: treesize reduction 5, result has 93.9 percent of original size [2021-11-12 23:06:44,174 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:06:44,178 INFO L180 QuantifierPusher]: treesize reduction 33, result has 69.4 percent of original size [2021-11-12 23:06:44,182 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:06:44,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:44,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:44,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:44,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:44,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:44,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:44,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:44,198 INFO L180 QuantifierPusher]: treesize reduction 17, result has 66.0 percent of original size [2021-11-12 23:06:44,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:44,202 INFO L180 QuantifierPusher]: treesize reduction 29, result has 50.8 percent of original size [2021-11-12 23:06:44,204 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:06:44,211 INFO L180 QuantifierPusher]: treesize reduction 17, result has 66.0 percent of original size [2021-11-12 23:06:44,212 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:44,220 INFO L180 QuantifierPusher]: treesize reduction 29, result has 50.8 percent of original size [2021-11-12 23:06:44,221 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:06:44,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:44,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:44,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:44,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:44,233 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:06:44,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:06:44,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:06:44,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-11-12 23:06:44,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539036695] [2021-11-12 23:06:44,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:06:44,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:06:44,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:44,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:06:44,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:06:44,601 INFO L87 Difference]: Start difference. First operand 1798 states and 2664 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-11-12 23:06:44,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:44,677 INFO L93 Difference]: Finished difference Result 3110 states and 4688 transitions. [2021-11-12 23:06:44,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:06:44,678 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 20 [2021-11-12 23:06:44,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:44,695 INFO L225 Difference]: With dead ends: 3110 [2021-11-12 23:06:44,695 INFO L226 Difference]: Without dead ends: 3108 [2021-11-12 23:06:44,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:06:44,699 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.67ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:44,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 60 Invalid, 33 Unknown, 0 Unchecked, 0.67ms Time], IncrementalHoareTripleChecker [17 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 32.88ms Time] [2021-11-12 23:06:44,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3108 states. [2021-11-12 23:06:44,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3108 to 2295. [2021-11-12 23:06:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2289 states have (on average 1.4600262123197902) internal successors, (3342), 2294 states have internal predecessors, (3342), 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) [2021-11-12 23:06:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 3342 transitions. [2021-11-12 23:06:44,772 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 3342 transitions. Word has length 20 [2021-11-12 23:06:44,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:44,772 INFO L470 AbstractCegarLoop]: Abstraction has 2295 states and 3342 transitions. [2021-11-12 23:06:44,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-11-12 23:06:44,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 3342 transitions. [2021-11-12 23:06:44,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-12 23:06:44,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:44,773 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1] [2021-11-12 23:06:44,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:45,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-11-12 23:06:45,001 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:45,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:45,001 INFO L85 PathProgramCache]: Analyzing trace with hash -923998945, now seen corresponding path program 1 times [2021-11-12 23:06:45,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:45,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434741892] [2021-11-12 23:06:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:45,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:45,045 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:45,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434741892] [2021-11-12 23:06:45,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434741892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:45,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963678008] [2021-11-12 23:06:45,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:45,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:45,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:45,046 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:06:45,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 23:06:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:45,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:06:45,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:45,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:45,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963678008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:06:45,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2062954511] [2021-11-12 23:06:45,222 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-12 23:06:45,222 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:06:45,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:06:45,223 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:06:45,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:06:45,232 INFO L180 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size [2021-11-12 23:06:45,234 INFO L185 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size 21 [2021-11-12 23:06:45,236 INFO L180 QuantifierPusher]: treesize reduction 29, result has 43.1 percent of original size [2021-11-12 23:06:45,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-12 23:06:45,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:45,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:45,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:45,251 INFO L180 QuantifierPusher]: treesize reduction 5, result has 93.9 percent of original size [2021-11-12 23:06:45,259 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:06:45,264 INFO L180 QuantifierPusher]: treesize reduction 25, result has 75.0 percent of original size [2021-11-12 23:06:45,267 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:06:45,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:45,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:45,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:45,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:45,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:45,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:45,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:45,286 INFO L180 QuantifierPusher]: treesize reduction 17, result has 66.0 percent of original size [2021-11-12 23:06:45,289 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:45,291 INFO L180 QuantifierPusher]: treesize reduction 21, result has 58.8 percent of original size [2021-11-12 23:06:45,293 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:06:45,297 INFO L180 QuantifierPusher]: treesize reduction 17, result has 66.0 percent of original size [2021-11-12 23:06:45,299 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:45,304 INFO L180 QuantifierPusher]: treesize reduction 21, result has 58.8 percent of original size [2021-11-12 23:06:45,305 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:06:45,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:45,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:45,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:45,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:45,320 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:06:45,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:06:45,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:06:45,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-12 23:06:45,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461545584] [2021-11-12 23:06:45,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:06:45,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:06:45,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:45,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:06:45,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:06:45,610 INFO L87 Difference]: Start difference. First operand 2295 states and 3342 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:06:45,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:45,757 INFO L93 Difference]: Finished difference Result 6600 states and 9697 transitions. [2021-11-12 23:06:45,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:06:45,758 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-12 23:06:45,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:45,793 INFO L225 Difference]: With dead ends: 6600 [2021-11-12 23:06:45,794 INFO L226 Difference]: Without dead ends: 6599 [2021-11-12 23:06:45,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:06:45,800 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 156 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.13ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:45,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 141 Invalid, 69 Unknown, 0 Unchecked, 1.13ms Time], IncrementalHoareTripleChecker [37 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 51.90ms Time] [2021-11-12 23:06:45,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6599 states. [2021-11-12 23:06:45,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6599 to 5400. [2021-11-12 23:06:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5400 states, 5394 states have (on average 1.4556915090841676) internal successors, (7852), 5399 states have internal predecessors, (7852), 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) [2021-11-12 23:06:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5400 states to 5400 states and 7852 transitions. [2021-11-12 23:06:46,008 INFO L78 Accepts]: Start accepts. Automaton has 5400 states and 7852 transitions. Word has length 25 [2021-11-12 23:06:46,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:46,008 INFO L470 AbstractCegarLoop]: Abstraction has 5400 states and 7852 transitions. [2021-11-12 23:06:46,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:06:46,009 INFO L276 IsEmpty]: Start isEmpty. Operand 5400 states and 7852 transitions. [2021-11-12 23:06:46,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-12 23:06:46,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:46,010 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1] [2021-11-12 23:06:46,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:46,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-11-12 23:06:46,210 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:46,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:46,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1295272154, now seen corresponding path program 1 times [2021-11-12 23:06:46,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:46,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855597852] [2021-11-12 23:06:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:46,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:46,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:46,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855597852] [2021-11-12 23:06:46,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855597852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:46,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319462579] [2021-11-12 23:06:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:46,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:46,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:46,249 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:06:46,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 23:06:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:46,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:06:46,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:46,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:46,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319462579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:06:46,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419611449] [2021-11-12 23:06:46,469 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-12 23:06:46,470 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:06:46,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:06:46,470 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:06:46,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:06:46,477 INFO L180 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size [2021-11-12 23:06:46,478 INFO L185 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size 21 [2021-11-12 23:06:46,481 INFO L180 QuantifierPusher]: treesize reduction 37, result has 37.3 percent of original size [2021-11-12 23:06:46,484 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-12 23:06:46,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:46,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:46,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:46,495 INFO L180 QuantifierPusher]: treesize reduction 5, result has 93.9 percent of original size [2021-11-12 23:06:46,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:06:46,502 INFO L180 QuantifierPusher]: treesize reduction 33, result has 69.4 percent of original size [2021-11-12 23:06:46,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:06:46,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:46,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:46,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:46,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:46,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:46,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:46,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:46,524 INFO L180 QuantifierPusher]: treesize reduction 17, result has 66.0 percent of original size [2021-11-12 23:06:46,525 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:46,528 INFO L180 QuantifierPusher]: treesize reduction 29, result has 50.8 percent of original size [2021-11-12 23:06:46,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:06:46,532 INFO L180 QuantifierPusher]: treesize reduction 17, result has 66.0 percent of original size [2021-11-12 23:06:46,533 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:46,548 INFO L180 QuantifierPusher]: treesize reduction 29, result has 50.8 percent of original size [2021-11-12 23:06:46,549 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:06:46,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:46,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:46,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:46,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:46,562 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:06:46,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:06:46,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:06:46,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-12 23:06:46,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732296867] [2021-11-12 23:06:46,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:06:46,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:06:46,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:46,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:06:46,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:06:46,987 INFO L87 Difference]: Start difference. First operand 5400 states and 7852 transitions. Second operand has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 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) [2021-11-12 23:06:47,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:47,224 INFO L93 Difference]: Finished difference Result 15528 states and 22801 transitions. [2021-11-12 23:06:47,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:06:47,225 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 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 31 [2021-11-12 23:06:47,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:47,296 INFO L225 Difference]: With dead ends: 15528 [2021-11-12 23:06:47,296 INFO L226 Difference]: Without dead ends: 15527 [2021-11-12 23:06:47,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:06:47,310 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 140 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.10ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:47,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 141 Invalid, 67 Unknown, 0 Unchecked, 1.10ms Time], IncrementalHoareTripleChecker [34 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 58.21ms Time] [2021-11-12 23:06:47,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15527 states. [2021-11-12 23:06:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15527 to 12717. [2021-11-12 23:06:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12717 states, 12711 states have (on average 1.4511840138462748) internal successors, (18446), 12716 states have internal predecessors, (18446), 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) [2021-11-12 23:06:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12717 states to 12717 states and 18446 transitions. [2021-11-12 23:06:47,760 INFO L78 Accepts]: Start accepts. Automaton has 12717 states and 18446 transitions. Word has length 31 [2021-11-12 23:06:47,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:47,761 INFO L470 AbstractCegarLoop]: Abstraction has 12717 states and 18446 transitions. [2021-11-12 23:06:47,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 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) [2021-11-12 23:06:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 12717 states and 18446 transitions. [2021-11-12 23:06:47,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 23:06:47,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:47,763 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1] [2021-11-12 23:06:47,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:47,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:47,989 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:47,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash 188182408, now seen corresponding path program 2 times [2021-11-12 23:06:47,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:47,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463634285] [2021-11-12 23:06:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:47,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:48,040 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:48,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463634285] [2021-11-12 23:06:48,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463634285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:48,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817005955] [2021-11-12 23:06:48,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:06:48,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:48,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:48,042 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:06:48,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-12 23:06:48,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-12 23:06:48,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:06:48,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:06:48,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:48,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:48,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817005955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:06:48,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [774270970] [2021-11-12 23:06:48,255 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:06:48,255 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:06:48,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:06:48,255 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:06:48,256 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:06:48,260 INFO L180 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size [2021-11-12 23:06:48,262 INFO L185 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size 21 [2021-11-12 23:06:48,265 INFO L180 QuantifierPusher]: treesize reduction 25, result has 46.8 percent of original size [2021-11-12 23:06:48,269 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:06:48,271 INFO L180 QuantifierPusher]: treesize reduction 8, result has 81.8 percent of original size [2021-11-12 23:06:48,275 INFO L185 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size 21 [2021-11-12 23:06:48,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,290 INFO L180 QuantifierPusher]: treesize reduction 39, result has 62.1 percent of original size [2021-11-12 23:06:48,292 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-12 23:06:48,294 INFO L180 QuantifierPusher]: treesize reduction 9, result has 90.0 percent of original size [2021-11-12 23:06:48,300 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-11-12 23:06:48,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,319 INFO L180 QuantifierPusher]: treesize reduction 23, result has 52.1 percent of original size [2021-11-12 23:06:48,321 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-12 23:06:48,323 INFO L180 QuantifierPusher]: treesize reduction 5, result has 89.4 percent of original size [2021-11-12 23:06:48,328 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:06:48,331 INFO L180 QuantifierPusher]: treesize reduction 23, result has 52.1 percent of original size [2021-11-12 23:06:48,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-12 23:06:48,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:48,452 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:48,458 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:06:48,460 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:48,463 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:06:48,464 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:06:48,466 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-11-12 23:06:48,468 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 133 [2021-11-12 23:06:48,469 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 150 [2021-11-12 23:06:48,472 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:06:48,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:06:48,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:06:48,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-12 23:06:48,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222463475] [2021-11-12 23:06:48,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:06:48,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:06:48,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:48,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:06:48,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:06:48,970 INFO L87 Difference]: Start difference. First operand 12717 states and 18446 transitions. Second operand has 12 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 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) [2021-11-12 23:06:49,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:49,542 INFO L93 Difference]: Finished difference Result 43312 states and 64319 transitions. [2021-11-12 23:06:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:06:49,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 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 [2021-11-12 23:06:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:49,715 INFO L225 Difference]: With dead ends: 43312 [2021-11-12 23:06:49,716 INFO L226 Difference]: Without dead ends: 43310 [2021-11-12 23:06:49,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:06:49,757 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 325 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.02ms SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:49,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 222 Invalid, 123 Unknown, 0 Unchecked, 2.02ms Time], IncrementalHoareTripleChecker [71 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 85.57ms Time] [2021-11-12 23:06:49,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43310 states. [2021-11-12 23:06:50,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43310 to 27375. [2021-11-12 23:06:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27375 states, 27369 states have (on average 1.4275274946106908) internal successors, (39070), 27374 states have internal predecessors, (39070), 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) [2021-11-12 23:06:50,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27375 states to 27375 states and 39070 transitions. [2021-11-12 23:06:50,754 INFO L78 Accepts]: Start accepts. Automaton has 27375 states and 39070 transitions. Word has length 35 [2021-11-12 23:06:50,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:50,754 INFO L470 AbstractCegarLoop]: Abstraction has 27375 states and 39070 transitions. [2021-11-12 23:06:50,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 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) [2021-11-12 23:06:50,755 INFO L276 IsEmpty]: Start isEmpty. Operand 27375 states and 39070 transitions. [2021-11-12 23:06:50,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-12 23:06:50,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:50,758 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1] [2021-11-12 23:06:50,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:50,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:50,985 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:50,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:50,985 INFO L85 PathProgramCache]: Analyzing trace with hash -14465935, now seen corresponding path program 2 times [2021-11-12 23:06:50,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:50,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078252746] [2021-11-12 23:06:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:50,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:51,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:51,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078252746] [2021-11-12 23:06:51,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078252746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:51,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449488597] [2021-11-12 23:06:51,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:06:51,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:51,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:51,046 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:06:51,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-12 23:06:51,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-12 23:06:51,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:06:51,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:06:51,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:51,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:51,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449488597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:06:51,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [585684127] [2021-11-12 23:06:51,332 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-12 23:06:51,332 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:06:51,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:06:51,332 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:06:51,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:06:51,337 INFO L180 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size [2021-11-12 23:06:51,340 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-12 23:06:51,341 INFO L180 QuantifierPusher]: treesize reduction 32, result has 45.8 percent of original size [2021-11-12 23:06:51,343 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:06:51,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:51,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:51,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:51,357 INFO L180 QuantifierPusher]: treesize reduction 12, result has 86.2 percent of original size [2021-11-12 23:06:51,367 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 23:06:51,370 INFO L180 QuantifierPusher]: treesize reduction 31, result has 69.6 percent of original size [2021-11-12 23:06:51,373 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-11-12 23:06:51,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:51,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:51,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:51,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:51,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:51,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:51,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:51,390 INFO L180 QuantifierPusher]: treesize reduction 17, result has 66.0 percent of original size [2021-11-12 23:06:51,392 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:51,395 INFO L180 QuantifierPusher]: treesize reduction 27, result has 50.9 percent of original size [2021-11-12 23:06:51,396 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-12 23:06:51,399 INFO L180 QuantifierPusher]: treesize reduction 17, result has 66.0 percent of original size [2021-11-12 23:06:51,401 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:51,406 INFO L180 QuantifierPusher]: treesize reduction 27, result has 50.9 percent of original size [2021-11-12 23:06:51,411 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-12 23:06:51,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:51,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:51,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:51,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:51,433 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:06:51,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:06:51,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:06:51,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-12 23:06:51,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677695247] [2021-11-12 23:06:51,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:06:51,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:06:51,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:51,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:06:51,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:06:51,880 INFO L87 Difference]: Start difference. First operand 27375 states and 39070 transitions. Second operand has 12 states, 11 states have (on average 8.181818181818182) internal successors, (90), 11 states have internal predecessors, (90), 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) [2021-11-12 23:06:53,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:53,035 INFO L93 Difference]: Finished difference Result 93112 states and 136145 transitions. [2021-11-12 23:06:53,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:06:53,035 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 8.181818181818182) internal successors, (90), 11 states have internal predecessors, (90), 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 45 [2021-11-12 23:06:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:53,189 INFO L225 Difference]: With dead ends: 93112 [2021-11-12 23:06:53,189 INFO L226 Difference]: Without dead ends: 93110 [2021-11-12 23:06:53,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:06:53,214 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 319 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.33ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:53,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 222 Invalid, 99 Unknown, 0 Unchecked, 2.33ms Time], IncrementalHoareTripleChecker [49 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 68.90ms Time] [2021-11-12 23:06:53,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93110 states. [2021-11-12 23:06:54,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93110 to 58897. [2021-11-12 23:06:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58897 states, 58891 states have (on average 1.4050703842692431) internal successors, (82746), 58896 states have internal predecessors, (82746), 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) [2021-11-12 23:06:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58897 states to 58897 states and 82746 transitions. [2021-11-12 23:06:55,165 INFO L78 Accepts]: Start accepts. Automaton has 58897 states and 82746 transitions. Word has length 45 [2021-11-12 23:06:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:55,166 INFO L470 AbstractCegarLoop]: Abstraction has 58897 states and 82746 transitions. [2021-11-12 23:06:55,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 8.181818181818182) internal successors, (90), 11 states have internal predecessors, (90), 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) [2021-11-12 23:06:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 58897 states and 82746 transitions. [2021-11-12 23:06:55,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:06:55,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:55,170 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 1, 1] [2021-11-12 23:06:55,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:55,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-11-12 23:06:55,397 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:06:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:55,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1069468473, now seen corresponding path program 2 times [2021-11-12 23:06:55,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:06:55,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77375691] [2021-11-12 23:06:55,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:55,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:06:55,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:55,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:06:55,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77375691] [2021-11-12 23:06:55,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77375691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:55,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443517941] [2021-11-12 23:06:55,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:06:55,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:06:55,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:55,490 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:06:55,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-12 23:06:55,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-12 23:06:55,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:06:55,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:06:55,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:55,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:55,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443517941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:06:55,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1376748890] [2021-11-12 23:06:55,846 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-12 23:06:55,846 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:06:55,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:06:55,847 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:06:55,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:06:55,852 INFO L180 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size [2021-11-12 23:06:55,855 INFO L185 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size 21 [2021-11-12 23:06:55,857 INFO L180 QuantifierPusher]: treesize reduction 29, result has 43.1 percent of original size [2021-11-12 23:06:55,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-12 23:06:55,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:55,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:55,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:55,872 INFO L180 QuantifierPusher]: treesize reduction 5, result has 93.9 percent of original size [2021-11-12 23:06:55,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:06:55,878 INFO L180 QuantifierPusher]: treesize reduction 25, result has 75.0 percent of original size [2021-11-12 23:06:55,880 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:06:55,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:55,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:55,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:55,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:55,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:55,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:55,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:55,898 INFO L180 QuantifierPusher]: treesize reduction 17, result has 66.0 percent of original size [2021-11-12 23:06:55,905 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:55,907 INFO L180 QuantifierPusher]: treesize reduction 21, result has 58.8 percent of original size [2021-11-12 23:06:55,908 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:06:55,911 INFO L180 QuantifierPusher]: treesize reduction 17, result has 66.0 percent of original size [2021-11-12 23:06:55,912 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:06:55,917 INFO L180 QuantifierPusher]: treesize reduction 21, result has 58.8 percent of original size [2021-11-12 23:06:55,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:06:55,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:55,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:55,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:55,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:06:55,930 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:06:56,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:06:56,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:06:56,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-12 23:06:56,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119100146] [2021-11-12 23:06:56,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:06:56,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:06:56,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:06:56,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:06:56,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:06:56,307 INFO L87 Difference]: Start difference. First operand 58897 states and 82746 transitions. Second operand has 16 states, 15 states have (on average 7.6) internal successors, (114), 15 states have internal predecessors, (114), 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) [2021-11-12 23:06:58,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:58,708 INFO L93 Difference]: Finished difference Result 207476 states and 294184 transitions. [2021-11-12 23:06:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:06:58,708 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 7.6) internal successors, (114), 15 states have internal predecessors, (114), 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 57 [2021-11-12 23:06:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:59,043 INFO L225 Difference]: With dead ends: 207476 [2021-11-12 23:06:59,043 INFO L226 Difference]: Without dead ends: 207475 [2021-11-12 23:06:59,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 147 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:06:59,076 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 674 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.61ms SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:59,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 301 Invalid, 165 Unknown, 0 Unchecked, 3.61ms Time], IncrementalHoareTripleChecker [103 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 140.29ms Time] [2021-11-12 23:06:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207475 states. [2021-11-12 23:07:02,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207475 to 115067. [2021-11-12 23:07:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115067 states, 115061 states have (on average 1.3967895290324264) internal successors, (160716), 115066 states have internal predecessors, (160716), 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) [2021-11-12 23:07:02,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115067 states to 115067 states and 160716 transitions. [2021-11-12 23:07:02,437 INFO L78 Accepts]: Start accepts. Automaton has 115067 states and 160716 transitions. Word has length 57 [2021-11-12 23:07:02,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:02,437 INFO L470 AbstractCegarLoop]: Abstraction has 115067 states and 160716 transitions. [2021-11-12 23:07:02,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 7.6) internal successors, (114), 15 states have internal predecessors, (114), 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) [2021-11-12 23:07:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 115067 states and 160716 transitions. [2021-11-12 23:07:02,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:07:02,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:02,447 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1] [2021-11-12 23:07:02,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:02,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-11-12 23:07:02,669 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:07:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:02,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1605996634, now seen corresponding path program 2 times [2021-11-12 23:07:02,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:02,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351849490] [2021-11-12 23:07:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:02,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:02,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:02,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351849490] [2021-11-12 23:07:02,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351849490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:02,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370447917] [2021-11-12 23:07:02,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:07:02,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:07:02,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:07:02,770 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:07:03,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-12 23:07:03,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-12 23:07:03,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:07:03,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:07:03,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:03,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:03,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370447917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:07:03,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [266116964] [2021-11-12 23:07:03,594 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-12 23:07:03,594 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:07:03,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:07:03,595 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:07:03,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:07:03,599 INFO L180 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size [2021-11-12 23:07:03,601 INFO L185 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size 21 [2021-11-12 23:07:03,603 INFO L180 QuantifierPusher]: treesize reduction 37, result has 37.3 percent of original size [2021-11-12 23:07:03,604 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-12 23:07:03,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:03,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:03,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:03,619 INFO L180 QuantifierPusher]: treesize reduction 5, result has 93.9 percent of original size [2021-11-12 23:07:03,622 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:07:03,628 INFO L180 QuantifierPusher]: treesize reduction 33, result has 69.4 percent of original size [2021-11-12 23:07:03,633 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-12 23:07:03,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:03,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:03,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:03,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:03,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:03,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:03,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:03,647 INFO L180 QuantifierPusher]: treesize reduction 17, result has 66.0 percent of original size [2021-11-12 23:07:03,648 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:07:03,650 INFO L180 QuantifierPusher]: treesize reduction 29, result has 50.8 percent of original size [2021-11-12 23:07:03,651 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:07:03,656 INFO L180 QuantifierPusher]: treesize reduction 17, result has 66.0 percent of original size [2021-11-12 23:07:03,658 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-12 23:07:03,664 INFO L180 QuantifierPusher]: treesize reduction 29, result has 50.8 percent of original size [2021-11-12 23:07:03,665 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 23:07:03,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:03,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:03,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:03,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:07:03,682 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:07:04,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:07:04,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:07:04,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-12 23:07:04,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789112592] [2021-11-12 23:07:04,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:07:04,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:07:04,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:04,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:07:04,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:07:04,234 INFO L87 Difference]: Start difference. First operand 115067 states and 160716 transitions. Second operand has 16 states, 15 states have (on average 9.466666666666667) internal successors, (142), 15 states have internal predecessors, (142), 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) [2021-11-12 23:07:08,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:08,518 INFO L93 Difference]: Finished difference Result 405128 states and 571168 transitions. [2021-11-12 23:07:08,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:07:08,530 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 9.466666666666667) internal successors, (142), 15 states have internal predecessors, (142), 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 [2021-11-12 23:07:08,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:09,235 INFO L225 Difference]: With dead ends: 405128 [2021-11-12 23:07:09,235 INFO L226 Difference]: Without dead ends: 405127 [2021-11-12 23:07:09,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 181 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:07:09,308 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 320 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:09,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 301 Invalid, 155 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [86 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 104.44ms Time] [2021-11-12 23:07:10,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405127 states. [2021-11-12 23:07:15,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405127 to 224757. [2021-11-12 23:07:16,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224757 states, 224751 states have (on average 1.3887635650119465) internal successors, (312126), 224756 states have internal predecessors, (312126), 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) [2021-11-12 23:07:16,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224757 states to 224757 states and 312126 transitions. [2021-11-12 23:07:16,875 INFO L78 Accepts]: Start accepts. Automaton has 224757 states and 312126 transitions. Word has length 71 [2021-11-12 23:07:16,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:16,876 INFO L470 AbstractCegarLoop]: Abstraction has 224757 states and 312126 transitions. [2021-11-12 23:07:16,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 9.466666666666667) internal successors, (142), 15 states have internal predecessors, (142), 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) [2021-11-12 23:07:16,876 INFO L276 IsEmpty]: Start isEmpty. Operand 224757 states and 312126 transitions. [2021-11-12 23:07:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-12 23:07:16,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:16,885 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 1, 1] [2021-11-12 23:07:16,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:17,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:07:17,101 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-12 23:07:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:17,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1165827000, now seen corresponding path program 3 times [2021-11-12 23:07:17,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:17,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950611141] [2021-11-12 23:07:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:17,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:17,239 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:17,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950611141] [2021-11-12 23:07:17,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950611141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:17,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356575529] [2021-11-12 23:07:17,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:07:17,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:07:17,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:07:17,241 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:07:17,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-12 23:07:17,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:07:17,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:07:17,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:07:17,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 375 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:17,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 375 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:18,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356575529] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:18,160 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:07:18,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [11] total 34 [2021-11-12 23:07:18,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951662717] [2021-11-12 23:07:18,161 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:18,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-12 23:07:18,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:18,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-12 23:07:18,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=892, Unknown=0, NotChecked=0, Total=1190 [2021-11-12 23:07:18,163 INFO L87 Difference]: Start difference. First operand 224757 states and 312126 transitions. Second operand has 24 states, 24 states have (on average 6.208333333333333) internal successors, (149), 23 states have internal predecessors, (149), 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) [2021-11-12 23:07:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:19,907 INFO L93 Difference]: Finished difference Result 243071 states and 336740 transitions. [2021-11-12 23:07:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:07:19,908 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.208333333333333) internal successors, (149), 23 states have internal predecessors, (149), 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 77 [2021-11-12 23:07:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:19,908 INFO L225 Difference]: With dead ends: 243071 [2021-11-12 23:07:19,908 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 23:07:20,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=892, Unknown=0, NotChecked=0, Total=1190 [2021-11-12 23:07:20,010 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 200 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.88ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:20,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 810 Invalid, 155 Unknown, 0 Unchecked, 1.88ms Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 74.01ms Time] [2021-11-12 23:07:20,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 23:07:20,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 23:07:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-11-12 23:07:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 23:07:20,011 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 77 [2021-11-12 23:07:20,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:20,012 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 23:07:20,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.208333333333333) internal successors, (149), 23 states have internal predecessors, (149), 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) [2021-11-12 23:07:20,012 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 23:07:20,012 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 23:07:20,015 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 10 remaining) [2021-11-12 23:07:20,016 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 10 remaining) [2021-11-12 23:07:20,016 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2021-11-12 23:07:20,016 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2021-11-12 23:07:20,016 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2021-11-12 23:07:20,017 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2021-11-12 23:07:20,017 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2021-11-12 23:07:20,017 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2021-11-12 23:07:20,017 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2021-11-12 23:07:20,018 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2021-11-12 23:07:20,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-12 23:07:20,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16bba592-0eb1-48a6-a8e0-7775d293d462/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-11-12 23:07:20,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.