./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2616f51a0d79e0bd682803708141b0dc94462ecdbaee78ea9cc6b43878e4310d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:51:02,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:51:02,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:51:02,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:51:02,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:51:02,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:51:02,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:51:02,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:51:02,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:51:02,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:51:02,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:51:02,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:51:02,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:51:02,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:51:02,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:51:02,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:51:02,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:51:02,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:51:02,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:51:02,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:51:02,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:51:02,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:51:02,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:51:02,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:51:02,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:51:02,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:51:02,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:51:02,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:51:02,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:51:02,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:51:02,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:51:02,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:51:02,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:51:02,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:51:02,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:51:02,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:51:02,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:51:02,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:51:02,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:51:02,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:51:02,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:51:02,677 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:51:02,709 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:51:02,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:51:02,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:51:02,710 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:51:02,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:51:02,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:51:02,712 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:51:02,712 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:51:02,713 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:51:02,713 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:51:02,713 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:51:02,714 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:51:02,714 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:51:02,714 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:51:02,715 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:51:02,715 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:51:02,715 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:51:02,716 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:51:02,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:51:02,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:51:02,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:51:02,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:51:02,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:51:02,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:51:02,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:51:02,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:51:02,719 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:51:02,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:51:02,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:51:02,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:51:02,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:51:02,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:51:02,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:51:02,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:51:02,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:51:02,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:51:02,726 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:51:02,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:51:02,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:51:02,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:51:02,728 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:51:02,728 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_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2616f51a0d79e0bd682803708141b0dc94462ecdbaee78ea9cc6b43878e4310d [2021-11-23 02:51:03,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:51:03,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:51:03,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:51:03,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:51:03,130 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:51:03,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2021-11-23 02:51:03,219 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/data/ff786bca8/d96803bfe6014433a217b03ffe715a22/FLAGac2472177 [2021-11-23 02:51:03,780 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:51:03,787 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2021-11-23 02:51:03,799 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/data/ff786bca8/d96803bfe6014433a217b03ffe715a22/FLAGac2472177 [2021-11-23 02:51:04,078 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/data/ff786bca8/d96803bfe6014433a217b03ffe715a22 [2021-11-23 02:51:04,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:51:04,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:51:04,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:51:04,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:51:04,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:51:04,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:51:04" (1/1) ... [2021-11-23 02:51:04,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6faf52bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:04, skipping insertion in model container [2021-11-23 02:51:04,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:51:04" (1/1) ... [2021-11-23 02:51:04,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:51:04,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:51:04,313 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c[525,538] [2021-11-23 02:51:04,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:51:04,372 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:51:04,386 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c[525,538] [2021-11-23 02:51:04,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:51:04,436 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:51:04,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:04 WrapperNode [2021-11-23 02:51:04,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:51:04,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:51:04,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:51:04,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:51:04,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:04" (1/1) ... [2021-11-23 02:51:04,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:04" (1/1) ... [2021-11-23 02:51:04,486 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-11-23 02:51:04,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:51:04,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:51:04,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:51:04,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:51:04,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:04" (1/1) ... [2021-11-23 02:51:04,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:04" (1/1) ... [2021-11-23 02:51:04,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:04" (1/1) ... [2021-11-23 02:51:04,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:04" (1/1) ... [2021-11-23 02:51:04,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:04" (1/1) ... [2021-11-23 02:51:04,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:04" (1/1) ... [2021-11-23 02:51:04,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:04" (1/1) ... [2021-11-23 02:51:04,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:51:04,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:51:04,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:51:04,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:51:04,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:04" (1/1) ... [2021-11-23 02:51:04,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:51:04,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:04,567 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:51:04,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:51:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:51:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:51:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:51:04,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:51:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 02:51:04,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 02:51:04,685 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:51:04,686 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:51:04,948 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:51:05,024 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:51:05,025 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:51:05,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:51:05 BoogieIcfgContainer [2021-11-23 02:51:05,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:51:05,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:51:05,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:51:05,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:51:05,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:51:04" (1/3) ... [2021-11-23 02:51:05,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4998fcdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:51:05, skipping insertion in model container [2021-11-23 02:51:05,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:04" (2/3) ... [2021-11-23 02:51:05,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4998fcdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:51:05, skipping insertion in model container [2021-11-23 02:51:05,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:51:05" (3/3) ... [2021-11-23 02:51:05,054 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound50.c [2021-11-23 02:51:05,060 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:51:05,060 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:51:05,118 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:51:05,127 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 [2021-11-23 02:51:05,127 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:51:05,146 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 02:51:05,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:51:05,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:05,155 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:05,156 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:05,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:05,162 INFO L85 PathProgramCache]: Analyzing trace with hash -678335095, now seen corresponding path program 1 times [2021-11-23 02:51:05,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:05,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593778432] [2021-11-23 02:51:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:05,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:05,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:05,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593778432] [2021-11-23 02:51:05,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593778432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:05,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:05,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:51:05,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025448532] [2021-11-23 02:51:05,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:05,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:51:05,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:05,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:51:05,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:51:05,389 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:07,445 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:07,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:07,446 INFO L93 Difference]: Finished difference Result 44 states and 78 transitions. [2021-11-23 02:51:07,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:51:07,544 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:51:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:07,553 INFO L225 Difference]: With dead ends: 44 [2021-11-23 02:51:07,554 INFO L226 Difference]: Without dead ends: 22 [2021-11-23 02:51:07,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:51:07,561 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:07,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 02:51:07,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-23 02:51:07,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-23 02:51:07,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-23 02:51:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2021-11-23 02:51:07,611 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2021-11-23 02:51:07,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:07,611 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2021-11-23 02:51:07,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:07,612 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2021-11-23 02:51:07,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:51:07,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:07,613 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:07,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:51:07,614 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:07,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:07,615 INFO L85 PathProgramCache]: Analyzing trace with hash 520368722, now seen corresponding path program 1 times [2021-11-23 02:51:07,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:07,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644495092] [2021-11-23 02:51:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:07,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:07,699 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:07,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644495092] [2021-11-23 02:51:07,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644495092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:07,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:07,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:51:07,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440522038] [2021-11-23 02:51:07,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:07,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:51:07,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:07,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:51:07,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:51:07,704 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:07,753 INFO L93 Difference]: Finished difference Result 42 states and 63 transitions. [2021-11-23 02:51:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:51:07,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 02:51:07,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:07,756 INFO L225 Difference]: With dead ends: 42 [2021-11-23 02:51:07,756 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 02:51:07,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:51:07,759 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:07,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:51:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 02:51:07,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-23 02:51:07,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-23 02:51:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2021-11-23 02:51:07,773 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 9 [2021-11-23 02:51:07,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:07,773 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2021-11-23 02:51:07,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:07,774 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2021-11-23 02:51:07,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:51:07,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:07,787 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:07,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:51:07,793 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:07,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:07,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1389535714, now seen corresponding path program 1 times [2021-11-23 02:51:07,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:07,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578488029] [2021-11-23 02:51:07,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:07,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:07,823 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:51:07,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555985058] [2021-11-23 02:51:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:07,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:07,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:07,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:07,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:51:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:07,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:51:07,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:08,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:51:08,021 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:08,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578488029] [2021-11-23 02:51:08,022 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:51:08,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555985058] [2021-11-23 02:51:08,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555985058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:08,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:08,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:51:08,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151785565] [2021-11-23 02:51:08,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:08,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:08,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:08,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:08,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:08,027 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:10,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:10,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:10,109 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2021-11-23 02:51:10,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:51:10,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 02:51:10,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:10,205 INFO L225 Difference]: With dead ends: 37 [2021-11-23 02:51:10,205 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 02:51:10,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:10,208 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:10,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 86 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 02:51:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 02:51:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-23 02:51:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-23 02:51:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2021-11-23 02:51:10,220 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 10 [2021-11-23 02:51:10,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:10,221 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2021-11-23 02:51:10,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:10,222 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2021-11-23 02:51:10,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:51:10,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:10,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:10,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:10,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:10,438 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:10,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:10,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1388046164, now seen corresponding path program 1 times [2021-11-23 02:51:10,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:10,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186095169] [2021-11-23 02:51:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:10,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:10,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:10,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186095169] [2021-11-23 02:51:10,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186095169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:10,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:10,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:51:10,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643505354] [2021-11-23 02:51:10,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:10,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:51:10,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:10,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:51:10,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:51:10,907 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:11,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:11,302 INFO L93 Difference]: Finished difference Result 59 states and 89 transitions. [2021-11-23 02:51:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:51:11,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 02:51:11,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:11,305 INFO L225 Difference]: With dead ends: 59 [2021-11-23 02:51:11,305 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 02:51:11,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:51:11,308 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:11,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 157 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:51:11,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 02:51:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-23 02:51:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-23 02:51:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 56 transitions. [2021-11-23 02:51:11,326 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 56 transitions. Word has length 10 [2021-11-23 02:51:11,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:11,327 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 56 transitions. [2021-11-23 02:51:11,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:11,327 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 56 transitions. [2021-11-23 02:51:11,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 02:51:11,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:11,328 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:11,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:51:11,329 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:11,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1970023331, now seen corresponding path program 1 times [2021-11-23 02:51:11,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:11,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359748294] [2021-11-23 02:51:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:11,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:11,344 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:51:11,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209249962] [2021-11-23 02:51:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:11,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:11,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:11,346 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:11,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:51:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:11,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:51:11,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:11,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:11,548 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:11,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359748294] [2021-11-23 02:51:11,548 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:51:11,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209249962] [2021-11-23 02:51:11,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209249962] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:11,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2035353083] [2021-11-23 02:51:11,590 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:51:11,591 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:51:11,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:51:11,607 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:51:11,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:51:12,121 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2021-11-23 02:51:12,133 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:51:12,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2035353083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:12,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:51:12,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4] total 15 [2021-11-23 02:51:12,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630229908] [2021-11-23 02:51:12,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:12,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:51:12,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:12,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:51:12,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:51:12,501 INFO L87 Difference]: Start difference. First operand 39 states and 56 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:12,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:12,901 INFO L93 Difference]: Finished difference Result 78 states and 117 transitions. [2021-11-23 02:51:12,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:51:12,904 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 02:51:12,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:12,908 INFO L225 Difference]: With dead ends: 78 [2021-11-23 02:51:12,909 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 02:51:12,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:51:12,912 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:12,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 100 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:51:12,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 02:51:12,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2021-11-23 02:51:12,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-23 02:51:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2021-11-23 02:51:12,958 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 12 [2021-11-23 02:51:12,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:12,959 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2021-11-23 02:51:12,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:12,959 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2021-11-23 02:51:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 02:51:12,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:12,961 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:13,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:13,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:13,182 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:13,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:13,183 INFO L85 PathProgramCache]: Analyzing trace with hash 600084205, now seen corresponding path program 1 times [2021-11-23 02:51:13,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:13,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399070127] [2021-11-23 02:51:13,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:13,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:13,204 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:51:13,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792624557] [2021-11-23 02:51:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:13,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:13,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:13,209 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:13,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:51:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:13,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:51:13,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:13,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:13,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:13,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399070127] [2021-11-23 02:51:13,484 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:51:13,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792624557] [2021-11-23 02:51:13,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792624557] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:13,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1249532542] [2021-11-23 02:51:13,490 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:51:13,490 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:51:13,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:51:13,492 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:51:13,492 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:51:13,805 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2021-11-23 02:51:13,820 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:51:14,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1249532542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:14,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:51:14,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 5] total 17 [2021-11-23 02:51:14,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573692314] [2021-11-23 02:51:14,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:14,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:51:14,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:14,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:51:14,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:51:14,260 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:15,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:15,231 INFO L93 Difference]: Finished difference Result 68 states and 96 transitions. [2021-11-23 02:51:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:51:15,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 02:51:15,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:15,233 INFO L225 Difference]: With dead ends: 68 [2021-11-23 02:51:15,234 INFO L226 Difference]: Without dead ends: 65 [2021-11-23 02:51:15,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:51:15,236 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:15,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 107 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 02:51:15,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-23 02:51:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2021-11-23 02:51:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 30 states have internal predecessors, (34), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-23 02:51:15,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2021-11-23 02:51:15,266 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 13 [2021-11-23 02:51:15,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:15,267 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2021-11-23 02:51:15,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:15,268 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2021-11-23 02:51:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 02:51:15,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:15,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:15,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:15,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:15,485 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:15,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:15,486 INFO L85 PathProgramCache]: Analyzing trace with hash 601573755, now seen corresponding path program 1 times [2021-11-23 02:51:15,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:15,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814067515] [2021-11-23 02:51:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:15,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:15,766 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:15,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814067515] [2021-11-23 02:51:15,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814067515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:51:15,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221405237] [2021-11-23 02:51:15,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:15,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:15,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:15,768 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:15,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:51:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:15,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:51:15,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:16,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:16,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221405237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:16,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1745512069] [2021-11-23 02:51:16,313 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:51:16,313 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:51:16,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:51:16,314 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:51:16,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:51:16,591 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2021-11-23 02:51:16,641 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:51:17,358 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1143#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (< ~counter~0 51) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:51:17,358 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:51:17,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:51:17,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2021-11-23 02:51:17,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327179668] [2021-11-23 02:51:17,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:51:17,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:51:17,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:17,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:51:17,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:51:17,361 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:22,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:25,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 02:51:27,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:29,619 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 02:51:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:29,889 INFO L93 Difference]: Finished difference Result 92 states and 133 transitions. [2021-11-23 02:51:29,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:51:29,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 02:51:29,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:29,891 INFO L225 Difference]: With dead ends: 92 [2021-11-23 02:51:29,892 INFO L226 Difference]: Without dead ends: 65 [2021-11-23 02:51:29,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-11-23 02:51:29,894 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 42 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 96 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:29,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 404 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 188 Invalid, 4 Unknown, 0 Unchecked, 12.4s Time] [2021-11-23 02:51:29,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-23 02:51:29,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-11-23 02:51:29,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 28 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-23 02:51:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 93 transitions. [2021-11-23 02:51:29,916 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 93 transitions. Word has length 13 [2021-11-23 02:51:29,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:29,916 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 93 transitions. [2021-11-23 02:51:29,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 93 transitions. [2021-11-23 02:51:29,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:51:29,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:29,918 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:29,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:30,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:51:30,119 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:30,119 INFO L85 PathProgramCache]: Analyzing trace with hash -339513844, now seen corresponding path program 1 times [2021-11-23 02:51:30,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:30,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139429583] [2021-11-23 02:51:30,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:30,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:30,126 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:51:30,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231826658] [2021-11-23 02:51:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:30,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:30,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:30,138 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:30,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:51:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:30,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:51:30,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:51:30,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:51:30,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:30,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139429583] [2021-11-23 02:51:30,395 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:51:30,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231826658] [2021-11-23 02:51:30,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231826658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:30,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:30,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:51:30,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433628805] [2021-11-23 02:51:30,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:30,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:30,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:30,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:30,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:30,398 INFO L87 Difference]: Start difference. First operand 64 states and 93 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:51:32,520 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 02:51:34,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:36,851 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:37,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:37,292 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2021-11-23 02:51:37,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:51:37,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-23 02:51:37,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:37,295 INFO L225 Difference]: With dead ends: 75 [2021-11-23 02:51:37,295 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 02:51:37,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:51:37,296 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:37,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 109 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 3 Unknown, 0 Unchecked, 6.9s Time] [2021-11-23 02:51:37,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 02:51:37,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-23 02:51:37,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-23 02:51:37,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 74 transitions. [2021-11-23 02:51:37,310 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 74 transitions. Word has length 20 [2021-11-23 02:51:37,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:37,311 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 74 transitions. [2021-11-23 02:51:37,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:51:37,311 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 74 transitions. [2021-11-23 02:51:37,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 02:51:37,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:37,312 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:37,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:37,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:37,525 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:37,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:37,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1744099301, now seen corresponding path program 1 times [2021-11-23 02:51:37,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:37,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103704080] [2021-11-23 02:51:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:37,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:37,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:51:37,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444510827] [2021-11-23 02:51:37,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:37,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:37,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:37,538 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:37,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:51:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:37,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:51:37,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:51:37,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:51:37,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:37,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103704080] [2021-11-23 02:51:37,769 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:51:37,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444510827] [2021-11-23 02:51:37,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444510827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:37,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:37,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:51:37,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077976623] [2021-11-23 02:51:37,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:37,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:37,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:37,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:37,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:37,772 INFO L87 Difference]: Start difference. First operand 51 states and 74 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:51:39,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:42,132 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:42,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:42,676 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2021-11-23 02:51:42,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:51:42,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-11-23 02:51:42,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:42,679 INFO L225 Difference]: With dead ends: 61 [2021-11-23 02:51:42,679 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 02:51:42,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:51:42,680 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:42,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 120 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2021-11-23 02:51:42,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 02:51:42,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2021-11-23 02:51:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-23 02:51:42,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2021-11-23 02:51:42,691 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 23 [2021-11-23 02:51:42,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:42,692 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2021-11-23 02:51:42,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:51:42,692 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2021-11-23 02:51:42,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:51:42,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:42,694 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:42,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-23 02:51:42,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:42,899 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:42,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:42,900 INFO L85 PathProgramCache]: Analyzing trace with hash -787687870, now seen corresponding path program 1 times [2021-11-23 02:51:42,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:42,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871359633] [2021-11-23 02:51:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:42,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:42,914 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:51:42,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348025383] [2021-11-23 02:51:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:42,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:42,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:42,928 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:42,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38ab3750-4159-4462-bf36-e123a0e7bcf7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:51:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:43,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:51:43,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:51:43,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:51:43,445 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:43,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871359633] [2021-11-23 02:51:43,446 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:51:43,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348025383] [2021-11-23 02:51:43,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348025383] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:43,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [216591095] [2021-11-23 02:51:43,450 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-23 02:51:43,450 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:51:43,450 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:51:43,451 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:51:43,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:55:52,863 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2021-11-23 02:55:53,000 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:55:55,348 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (<= 2 c_~counter~0)) (.cse1 (<= 0 |c_#NULL.base|)) (.cse2 (<= c_~counter~0 51)) (.cse53 (<= |c_#NULL.offset| 0)) (.cse61 (<= 1 c_~counter~0)) (.cse54 (<= 0 |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1|)) (.cse55 (<= 0 |c_ULTIMATE.start_assume_abort_if_not_~cond#1|)) (.cse56 (<= |c_#NULL.base| 0)) (.cse57 (<= 0 |c_#NULL.offset|)) (.cse58 (<= |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1)) (.cse59 (<= 0 |c_#StackHeapBarrier|)) (.cse60 (<= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 1))) (and (or (and .cse0 .cse1 .cse2 (exists ((|aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| Int) (|aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| Int)) (let ((.cse4 (* 4 |c_ULTIMATE.start_main_~q~0#1|)) (.cse3 (+ (* 4294967296 |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111|) |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111|))) (and (< .cse3 (+ .cse4 4)) (<= 0 .cse3) (let ((.cse32 (div (mod (+ (* |c_ULTIMATE.start_main_~q~0#1| 4294967295) |c_ULTIMATE.start_main_~h~0#1|) 4294967296) 2)) (.cse19 (<= |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~h~0#1|)) (.cse20 (<= |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse18 (<= 3 c_~counter~0)) (.cse31 (mod (+ (* |c_ULTIMATE.start_main_~q~0#1| 4294967294) |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| (* |c_ULTIMATE.start_main_~h~0#1| 2)) 4294967296)) (.cse5 (mod |c_ULTIMATE.start_main_~h~0#1| 4294967296))) (or (let ((.cse6 (mod (+ |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1|) 4294967296))) (and (<= .cse5 .cse6) (let ((.cse7 (not (= (ite (< .cse6 .cse31) 1 0) 0)))) (or (and .cse7 (exists ((|v_ULTIMATE.start_main_~h~0#1_30| Int) (|aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| Int)) (let ((.cse17 (* |v_ULTIMATE.start_main_~h~0#1_30| 4)) (.cse10 (+ (* |aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| 4294967296) (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4294967296) |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111|)) (.cse13 (+ |c_ULTIMATE.start_main_~h~0#1| (* |c_ULTIMATE.start_main_~q~0#1| (- 1))))) (let ((.cse9 (* .cse13 .cse13)) (.cse8 (* |c_ULTIMATE.start_main_~n~0#1| .cse10)) (.cse16 (* .cse17 |c_ULTIMATE.start_main_~n~0#1|)) (.cse14 (* (+ (* |c_ULTIMATE.start_main_~h~0#1| 4) (* |c_ULTIMATE.start_main_~q~0#1| (- 4))) .cse10)) (.cse11 (+ |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse15 (* |v_ULTIMATE.start_main_~h~0#1_30| |v_ULTIMATE.start_main_~h~0#1_30|))) (and (not (= (ite (= (mod (+ (* .cse8 4294967295) .cse9 (* .cse10 .cse11)) 4294967296) 0) 1 0) 0)) (not (= (ite (= 0 (mod (let ((.cse12 (* |v_ULTIMATE.start_main_~h~0#1_30| 12))) (+ (* (* .cse12 .cse10) .cse11) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 16) .cse13) .cse10) (* (* (* |v_ULTIMATE.start_main_~h~0#1_30| .cse10) .cse10) 4294967295) (* (* .cse14 .cse10) 4294967295) (* (* (* .cse12 |c_ULTIMATE.start_main_~n~0#1|) .cse10) 4294967295) (* .cse15 |v_ULTIMATE.start_main_~h~0#1_30|) (* (* (* (+ (* |c_ULTIMATE.start_main_~q~0#1| (- 16)) (* |c_ULTIMATE.start_main_~h~0#1| 16)) .cse10) .cse11) 4294967295))) 4294967296)) 1 0) 0)) (not (= (ite (= (mod .cse8 4294967296) (mod (+ .cse9 (* .cse11 .cse10)) 4294967296)) 1 0) 0)) (not (= (ite (= (mod (+ (* (* (+ (* |aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| 17179869184) (* |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4) (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 17179869184)) .cse11) .cse11) (* (* (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1|) 4) .cse10) (* (* .cse16 .cse13) 4294967295) (* .cse15 |c_ULTIMATE.start_main_~n~0#1|) (* (* .cse17 .cse13) .cse11) (* (* .cse8 .cse10) 4294967295) (* (* .cse15 .cse11) 4294967295) (* (* (* (* |c_ULTIMATE.start_main_~n~0#1| 8) .cse10) .cse11) 4294967295) (* (* .cse10 .cse10) .cse11)) 4294967296) 0) 1 0) 0)) (not (= (ite (= (mod (+ (* (* .cse17 .cse10) .cse11) (* (* .cse16 .cse10) 4294967295) (* (* (* .cse13 .cse10) .cse10) 4294967295) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 4) .cse13) .cse10) (* (* .cse14 .cse11) 4294967295) (* .cse15 .cse13)) 4294967296) 0) 1 0) 0)))))) .cse18) (and .cse19 .cse7 .cse20 (exists ((|v_ULTIMATE.start_main_~h~0#1_30| Int) (|aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| Int)) (let ((.cse30 (* |v_ULTIMATE.start_main_~h~0#1_30| 4)) (.cse23 (+ (* |aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| 4294967296) (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4294967296) |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111|)) (.cse26 (+ |c_ULTIMATE.start_main_~h~0#1| (* |c_ULTIMATE.start_main_~q~0#1| (- 1))))) (let ((.cse22 (* .cse26 .cse26)) (.cse21 (* |c_ULTIMATE.start_main_~n~0#1| .cse23)) (.cse29 (* .cse30 |c_ULTIMATE.start_main_~n~0#1|)) (.cse27 (* (+ (* |c_ULTIMATE.start_main_~h~0#1| 4) (* |c_ULTIMATE.start_main_~q~0#1| (- 4))) .cse23)) (.cse24 (+ |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse28 (* |v_ULTIMATE.start_main_~h~0#1_30| |v_ULTIMATE.start_main_~h~0#1_30|))) (and (not (= (ite (= (mod (+ (* .cse21 4294967295) .cse22 (* .cse23 .cse24)) 4294967296) 0) 1 0) 0)) (not (= (ite (= 0 (mod (let ((.cse25 (* |v_ULTIMATE.start_main_~h~0#1_30| 12))) (+ (* (* .cse25 .cse23) .cse24) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 16) .cse26) .cse23) (* (* (* |v_ULTIMATE.start_main_~h~0#1_30| .cse23) .cse23) 4294967295) (* (* .cse27 .cse23) 4294967295) (* (* (* .cse25 |c_ULTIMATE.start_main_~n~0#1|) .cse23) 4294967295) (* .cse28 |v_ULTIMATE.start_main_~h~0#1_30|) (* (* (* (+ (* |c_ULTIMATE.start_main_~q~0#1| (- 16)) (* |c_ULTIMATE.start_main_~h~0#1| 16)) .cse23) .cse24) 4294967295))) 4294967296)) 1 0) 0)) (not (= (ite (= (mod .cse21 4294967296) (mod (+ .cse22 (* .cse24 .cse23)) 4294967296)) 1 0) 0)) (<= |v_ULTIMATE.start_main_~h~0#1_30| 0) (not (= (ite (= (mod (+ (* (* (+ (* |aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| 17179869184) (* |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4) (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 17179869184)) .cse24) .cse24) (* (* (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1|) 4) .cse23) (* (* .cse29 .cse26) 4294967295) (* .cse28 |c_ULTIMATE.start_main_~n~0#1|) (* (* .cse30 .cse26) .cse24) (* (* .cse21 .cse23) 4294967295) (* (* .cse28 .cse24) 4294967295) (* (* (* (* |c_ULTIMATE.start_main_~n~0#1| 8) .cse23) .cse24) 4294967295) (* (* .cse23 .cse23) .cse24)) 4294967296) 0) 1 0) 0)) (not (= (ite (= (mod (+ (* (* .cse30 .cse23) .cse24) (* (* .cse29 .cse23) 4294967295) (* (* (* .cse26 .cse23) .cse23) 4294967295) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 4) .cse26) .cse23) (* (* .cse27 .cse24) 4294967295) (* .cse28 .cse26)) 4294967296) 0) 1 0) 0)) (<= 0 |v_ULTIMATE.start_main_~h~0#1_30|)))))))) (= (+ .cse32 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|))) (let ((.cse52 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (and (= .cse32 |c_ULTIMATE.start_main_~p~0#1|) (let ((.cse42 (not (= (ite (< .cse52 .cse31) 1 0) 0)))) (or (and .cse19 .cse20 (exists ((|v_ULTIMATE.start_main_~h~0#1_30| Int) (|aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| Int)) (let ((.cse36 (+ |c_ULTIMATE.start_main_~h~0#1| (* |c_ULTIMATE.start_main_~q~0#1| (- 1)))) (.cse34 (+ (* |aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| 4294967296) (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4294967296) |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111|)) (.cse33 (* |v_ULTIMATE.start_main_~h~0#1_30| 4))) (let ((.cse35 (* .cse33 |c_ULTIMATE.start_main_~n~0#1|)) (.cse37 (* (+ (* |c_ULTIMATE.start_main_~h~0#1| 4) (* |c_ULTIMATE.start_main_~q~0#1| (- 4))) .cse34)) (.cse38 (* |v_ULTIMATE.start_main_~h~0#1_30| |v_ULTIMATE.start_main_~h~0#1_30|)) (.cse39 (* |c_ULTIMATE.start_main_~n~0#1| .cse34)) (.cse40 (* .cse36 .cse36))) (and (not (= (ite (= (mod (+ (* (* .cse33 .cse34) |c_ULTIMATE.start_main_~r~0#1|) (* (* .cse35 .cse34) 4294967295) (* (* (* .cse36 .cse34) .cse34) 4294967295) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 4) .cse36) .cse34) (* (* .cse37 |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* .cse38 .cse36)) 4294967296) 0) 1 0) 0)) (not (= (ite (= (mod (+ (* (* .cse33 .cse36) |c_ULTIMATE.start_main_~r~0#1|) (* (* .cse38 |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* (* (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1|) 4) .cse34) (* (* .cse34 .cse34) |c_ULTIMATE.start_main_~r~0#1|) (* (* .cse35 .cse36) 4294967295) (* .cse38 |c_ULTIMATE.start_main_~n~0#1|) (* (* .cse39 .cse34) 4294967295) (* (* (+ (* |aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| 17179869184) (* |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4) (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 17179869184)) |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~r~0#1|) (* (* (* (* |c_ULTIMATE.start_main_~n~0#1| 8) .cse34) |c_ULTIMATE.start_main_~r~0#1|) 4294967295)) 4294967296) 0) 1 0) 0)) (not (= 0 (ite (= (mod (+ (* .cse39 4294967295) .cse40 (* .cse34 |c_ULTIMATE.start_main_~r~0#1|)) 4294967296) 0) 1 0))) (not (= (ite (= (mod (let ((.cse41 (* |v_ULTIMATE.start_main_~h~0#1_30| 12))) (+ (* (* (* |c_ULTIMATE.start_main_~n~0#1| 16) .cse36) .cse34) (* (* (* |v_ULTIMATE.start_main_~h~0#1_30| .cse34) .cse34) 4294967295) (* (* (* (+ (* |c_ULTIMATE.start_main_~q~0#1| (- 16)) (* |c_ULTIMATE.start_main_~h~0#1| 16)) .cse34) |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* (* .cse37 .cse34) 4294967295) (* (* (* .cse41 |c_ULTIMATE.start_main_~n~0#1|) .cse34) 4294967295) (* (* .cse41 .cse34) |c_ULTIMATE.start_main_~r~0#1|) (* .cse38 |v_ULTIMATE.start_main_~h~0#1_30|))) 4294967296) 0) 1 0) 0)) (<= |v_ULTIMATE.start_main_~h~0#1_30| 0) (not (= (ite (= (mod .cse39 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~r~0#1| .cse34) .cse40) 4294967296)) 1 0) 0)) (<= 0 |v_ULTIMATE.start_main_~h~0#1_30|))))) .cse42) (and (exists ((|v_ULTIMATE.start_main_~h~0#1_30| Int) (|aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| Int)) (let ((.cse46 (+ |c_ULTIMATE.start_main_~h~0#1| (* |c_ULTIMATE.start_main_~q~0#1| (- 1)))) (.cse44 (+ (* |aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| 4294967296) (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4294967296) |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111|)) (.cse43 (* |v_ULTIMATE.start_main_~h~0#1_30| 4))) (let ((.cse45 (* .cse43 |c_ULTIMATE.start_main_~n~0#1|)) (.cse47 (* (+ (* |c_ULTIMATE.start_main_~h~0#1| 4) (* |c_ULTIMATE.start_main_~q~0#1| (- 4))) .cse44)) (.cse48 (* |v_ULTIMATE.start_main_~h~0#1_30| |v_ULTIMATE.start_main_~h~0#1_30|)) (.cse49 (* |c_ULTIMATE.start_main_~n~0#1| .cse44)) (.cse50 (* .cse46 .cse46))) (and (not (= (ite (= (mod (+ (* (* .cse43 .cse44) |c_ULTIMATE.start_main_~r~0#1|) (* (* .cse45 .cse44) 4294967295) (* (* (* .cse46 .cse44) .cse44) 4294967295) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 4) .cse46) .cse44) (* (* .cse47 |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* .cse48 .cse46)) 4294967296) 0) 1 0) 0)) (not (= (ite (= (mod (+ (* (* .cse43 .cse46) |c_ULTIMATE.start_main_~r~0#1|) (* (* .cse48 |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* (* (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1|) 4) .cse44) (* (* .cse44 .cse44) |c_ULTIMATE.start_main_~r~0#1|) (* (* .cse45 .cse46) 4294967295) (* .cse48 |c_ULTIMATE.start_main_~n~0#1|) (* (* .cse49 .cse44) 4294967295) (* (* (+ (* |aux_div_v_ULTIMATE.start_main_~q~0#1_55_50| 17179869184) (* |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4) (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 17179869184)) |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~r~0#1|) (* (* (* (* |c_ULTIMATE.start_main_~n~0#1| 8) .cse44) |c_ULTIMATE.start_main_~r~0#1|) 4294967295)) 4294967296) 0) 1 0) 0)) (not (= 0 (ite (= (mod (+ (* .cse49 4294967295) .cse50 (* .cse44 |c_ULTIMATE.start_main_~r~0#1|)) 4294967296) 0) 1 0))) (not (= (ite (= (mod (let ((.cse51 (* |v_ULTIMATE.start_main_~h~0#1_30| 12))) (+ (* (* (* |c_ULTIMATE.start_main_~n~0#1| 16) .cse46) .cse44) (* (* (* |v_ULTIMATE.start_main_~h~0#1_30| .cse44) .cse44) 4294967295) (* (* (* (+ (* |c_ULTIMATE.start_main_~q~0#1| (- 16)) (* |c_ULTIMATE.start_main_~h~0#1| 16)) .cse44) |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* (* .cse47 .cse44) 4294967295) (* (* (* .cse51 |c_ULTIMATE.start_main_~n~0#1|) .cse44) 4294967295) (* (* .cse51 .cse44) |c_ULTIMATE.start_main_~r~0#1|) (* .cse48 |v_ULTIMATE.start_main_~h~0#1_30|))) 4294967296) 0) 1 0) 0)) (not (= (ite (= (mod .cse49 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~r~0#1| .cse44) .cse50) 4294967296)) 1 0) 0)))))) .cse42 .cse18))) (< .cse52 .cse5))))) (<= .cse4 .cse3) (<= 0 |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111|) (< |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 4294967296) (not (= |aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~q~0#1_55_50_52_111| 1)) (< .cse3 4294967296)))) .cse53 .cse54 .cse55 .cse56 .cse57 .cse58 .cse59 .cse60) (and (= |c_ULTIMATE.start_main_~p~0#1| 0) (= |c_ULTIMATE.start_main_~h~0#1| 0) .cse61 .cse54 (< c_~counter~0 51) .cse55 (= |c_#NULL.offset| 0) (< (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296) (mod |c_ULTIMATE.start_main_~q~0#1| 4294967296)) .cse58 .cse59 .cse60 (= |c_#NULL.base| 0))) (or (and .cse0 .cse1 .cse2 .cse53 .cse54 .cse55 .cse56 .cse57 .cse58 .cse59 .cse60) (and (<= 0 |c_ULTIMATE.start_main_~h~0#1|) .cse1 (<= |c_ULTIMATE.start_main_~p~0#1| 0) .cse2 (<= |c_ULTIMATE.start_main_~h~0#1| 0) .cse53 (<= 0 |c_ULTIMATE.start_main_~p~0#1|) .cse61 .cse54 .cse55 .cse56 .cse57 .cse58 .cse59 .cse60)))) is different from false [2021-11-23 02:57:29,762 WARN L227 SmtUtils]: Spent 1.50m on a formula simplification. DAG size of input: 282 DAG size of output: 270 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:58:27,525 WARN L227 SmtUtils]: Spent 45.52s on a formula simplification. DAG size of input: 55 DAG size of output: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:59:41,321 WARN L227 SmtUtils]: Spent 1.05m on a formula simplification. DAG size of input: 87 DAG size of output: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:01:33,135 WARN L227 SmtUtils]: Spent 1.57m on a formula simplification. DAG size of input: 117 DAG size of output: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:01:35,145 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (<= 2 c_~counter~0)) (.cse1 (<= 0 |c_#NULL.base|)) (.cse2 (<= c_~counter~0 51)) (.cse5 (<= |c_#NULL.offset| 0)) (.cse7 (<= 0 |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1|)) (.cse8 (<= 0 |c_ULTIMATE.start_assume_abort_if_not_~cond#1|)) (.cse10 (<= |c_#NULL.base| 0)) (.cse12 (<= 0 |c_#NULL.offset|)) (.cse13 (<= |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1)) (.cse14 (<= 0 |c_#StackHeapBarrier|)) (.cse15 (<= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 1))) (and .cse0 .cse1 .cse2 (let ((.cse17 (* |c_ULTIMATE.start_main_~h~0#1| 4))) (let ((.cse20 (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse16 (* .cse17 |c_ULTIMATE.start_main_~n~0#1|)) (.cse19 (* (* |c_ULTIMATE.start_main_~p~0#1| 4) |c_ULTIMATE.start_main_~q~0#1|)) (.cse18 (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|))) (let ((.cse3 (not (= (ite (< (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0))) (.cse4 (not (= 0 (ite (= (mod (let ((.cse21 (* |c_ULTIMATE.start_main_~h~0#1| 12))) (+ (* (* .cse19 |c_ULTIMATE.start_main_~q~0#1|) 4294967295) (* (* (* (* |c_ULTIMATE.start_main_~p~0#1| 16) |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* (* .cse21 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) (* .cse18 |c_ULTIMATE.start_main_~h~0#1|) (* (* (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~q~0#1|) 4294967295) (* (* (* .cse21 |c_ULTIMATE.start_main_~n~0#1|) |c_ULTIMATE.start_main_~q~0#1|) 4294967295) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 16) |c_ULTIMATE.start_main_~p~0#1|) |c_ULTIMATE.start_main_~q~0#1|))) 4294967296) 0) 1 0)))) (.cse6 (not (= (ite (= (mod (+ (* (* (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1|) 4) |c_ULTIMATE.start_main_~q~0#1|) (* (* |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) (* (* .cse17 |c_ULTIMATE.start_main_~p~0#1|) |c_ULTIMATE.start_main_~r~0#1|) (* .cse18 |c_ULTIMATE.start_main_~n~0#1|) (* (* .cse20 |c_ULTIMATE.start_main_~q~0#1|) 4294967295) (* (* .cse18 |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* (* .cse16 |c_ULTIMATE.start_main_~p~0#1|) 4294967295) (* (* (* (* |c_ULTIMATE.start_main_~n~0#1| 8) |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967295) (* (* (* |c_ULTIMATE.start_main_~q~0#1| 4) |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~r~0#1|)) 4294967296) 0) 1 0) 0))) (.cse9 (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) (mod .cse20 4294967296)) 1 0) 0))) (.cse11 (not (= (ite (= (mod (+ (* (* .cse16 |c_ULTIMATE.start_main_~q~0#1|) 4294967295) (* (* (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~q~0#1|) 4294967295) (* (* .cse17 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) (* .cse18 |c_ULTIMATE.start_main_~p~0#1|) (* (* (* |c_ULTIMATE.start_main_~n~0#1| 4) |c_ULTIMATE.start_main_~p~0#1|) |c_ULTIMATE.start_main_~q~0#1|) (* (* .cse19 |c_ULTIMATE.start_main_~r~0#1|) 4294967295)) 4294967296) 0) 1 0) 0)))) (or (and (<= 0 |c_ULTIMATE.start_main_~h~0#1|) .cse0 .cse1 .cse3 (<= |c_ULTIMATE.start_main_~p~0#1| 0) .cse2 .cse4 (<= |c_ULTIMATE.start_main_~h~0#1| 0) .cse5 (<= 0 |c_ULTIMATE.start_main_~p~0#1|) .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15) (and .cse1 .cse3 .cse2 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 (<= 3 c_~counter~0)))))) .cse5 .cse7 .cse8 .cse10 .cse12 .cse13 .cse14 .cse15)) is different from false [2021-11-23 03:03:57,988 WARN L227 SmtUtils]: Spent 2.09m on a formula simplification. DAG size of input: 144 DAG size of output: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)