./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_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_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/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_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/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_8c8452c6-d509-44bc-931a-f0a4f31bafa6/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 7aff0c23635f1e1acd85672a1024d6cb6d0af57cad0028c56f5d301198b4eae6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:39:54,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:39:54,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:39:54,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:39:54,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:39:54,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:39:54,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:39:54,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:39:54,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:39:54,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:39:54,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:39:54,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:39:54,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:39:54,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:39:54,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:39:54,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:39:54,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:39:54,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:39:54,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:39:54,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:39:54,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:39:54,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:39:54,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:39:54,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:39:54,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:39:54,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:39:54,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:39:54,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:39:54,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:39:54,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:39:54,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:39:54,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:39:54,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:39:54,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:39:54,736 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:39:54,736 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:39:54,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:39:54,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:39:54,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:39:54,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:39:54,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:39:54,743 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:39:54,768 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:39:54,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:39:54,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:39:54,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:39:54,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:39:54,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:39:54,770 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:39:54,770 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:39:54,770 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:39:54,770 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:39:54,771 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:39:54,771 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:39:54,771 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:39:54,771 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:39:54,771 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:39:54,772 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:39:54,772 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:39:54,772 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:39:54,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:39:54,773 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:39:54,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:39:54,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:39:54,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:39:54,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:39:54,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:39:54,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:39:54,774 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:39:54,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:39:54,774 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:39:54,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:39:54,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:39:54,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:39:54,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:39:54,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:39:54,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:39:54,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:39:54,776 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:39:54,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:39:54,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:39:54,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:39:54,777 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:39:54,777 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_8c8452c6-d509-44bc-931a-f0a4f31bafa6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7aff0c23635f1e1acd85672a1024d6cb6d0af57cad0028c56f5d301198b4eae6 [2021-11-23 03:39:55,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:39:55,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:39:55,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:39:55,076 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:39:55,076 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:39:55,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c [2021-11-23 03:39:55,167 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/data/1dc543db2/4adc38317ff14de8a5be58c2507e5d7b/FLAG1e8ddb967 [2021-11-23 03:39:55,662 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:39:55,663 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c [2021-11-23 03:39:55,673 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/data/1dc543db2/4adc38317ff14de8a5be58c2507e5d7b/FLAG1e8ddb967 [2021-11-23 03:39:56,058 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/data/1dc543db2/4adc38317ff14de8a5be58c2507e5d7b [2021-11-23 03:39:56,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:39:56,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:39:56,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:39:56,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:39:56,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:39:56,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:39:56" (1/1) ... [2021-11-23 03:39:56,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f8d33e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:56, skipping insertion in model container [2021-11-23 03:39:56,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:39:56" (1/1) ... [2021-11-23 03:39:56,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:39:56,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:39:56,264 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_8c8452c6-d509-44bc-931a-f0a4f31bafa6/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c[573,586] [2021-11-23 03:39:56,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:39:56,293 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:39:56,302 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_8c8452c6-d509-44bc-931a-f0a4f31bafa6/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c[573,586] [2021-11-23 03:39:56,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:39:56,320 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:39:56,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:56 WrapperNode [2021-11-23 03:39:56,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:39:56,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:39:56,322 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:39:56,322 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:39:56,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:56" (1/1) ... [2021-11-23 03:39:56,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:56" (1/1) ... [2021-11-23 03:39:56,348 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2021-11-23 03:39:56,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:39:56,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:39:56,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:39:56,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:39:56,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:56" (1/1) ... [2021-11-23 03:39:56,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:56" (1/1) ... [2021-11-23 03:39:56,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:56" (1/1) ... [2021-11-23 03:39:56,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:56" (1/1) ... [2021-11-23 03:39:56,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:56" (1/1) ... [2021-11-23 03:39:56,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:56" (1/1) ... [2021-11-23 03:39:56,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:56" (1/1) ... [2021-11-23 03:39:56,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:39:56,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:39:56,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:39:56,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:39:56,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:56" (1/1) ... [2021-11-23 03:39:56,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:39:56,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:39:56,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:39:56,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:39:56,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:39:56,438 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:39:56,438 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:39:56,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:39:56,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:39:56,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:39:56,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 03:39:56,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 03:39:56,497 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:39:56,498 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:39:56,600 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:39:56,623 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:39:56,623 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:39:56,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:39:56 BoogieIcfgContainer [2021-11-23 03:39:56,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:39:56,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:39:56,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:39:56,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:39:56,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:39:56" (1/3) ... [2021-11-23 03:39:56,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b36b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:39:56, skipping insertion in model container [2021-11-23 03:39:56,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:56" (2/3) ... [2021-11-23 03:39:56,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b36b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:39:56, skipping insertion in model container [2021-11-23 03:39:56,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:39:56" (3/3) ... [2021-11-23 03:39:56,633 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound50.c [2021-11-23 03:39:56,638 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:39:56,639 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:39:56,686 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:39:56,694 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 03:39:56,694 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:39:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:39:56,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:39:56,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:56,718 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:39:56,718 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:39:56,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:56,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1046920148, now seen corresponding path program 1 times [2021-11-23 03:39:56,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:56,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753808774] [2021-11-23 03:39:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:56,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:39:56,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:56,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753808774] [2021-11-23 03:39:56,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753808774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:56,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:56,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:39:56,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671379062] [2021-11-23 03:39:56,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:56,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:39:56,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:57,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:39:57,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:39:57,016 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 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 03:39:57,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:57,067 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-11-23 03:39:57,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:39:57,069 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 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 13 [2021-11-23 03:39:57,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:57,079 INFO L225 Difference]: With dead ends: 32 [2021-11-23 03:39:57,079 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 03:39:57,085 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 03:39:57,091 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:57,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:39:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 03:39:57,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 03:39:57,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:39:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-23 03:39:57,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2021-11-23 03:39:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:57,184 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-23 03:39:57,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 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 03:39:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-23 03:39:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 03:39:57,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:57,186 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:39:57,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:39:57,187 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:39:57,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:57,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1317434454, now seen corresponding path program 1 times [2021-11-23 03:39:57,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:57,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105096597] [2021-11-23 03:39:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:57,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:39:57,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:57,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105096597] [2021-11-23 03:39:57,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105096597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:57,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:57,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:39:57,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635472954] [2021-11-23 03:39:57,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:57,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:39:57,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:57,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:39:57,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:39:57,317 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 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 03:39:57,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:57,354 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-11-23 03:39:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:39:57,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 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 14 [2021-11-23 03:39:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:57,356 INFO L225 Difference]: With dead ends: 26 [2021-11-23 03:39:57,357 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 03:39:57,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 03:39:57,359 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:57,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 39 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:39:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 03:39:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 03:39:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:39:57,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-23 03:39:57,372 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2021-11-23 03:39:57,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:57,373 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-23 03:39:57,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 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 03:39:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-23 03:39:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 03:39:57,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:57,377 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:39:57,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:39:57,378 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:39:57,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:57,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1319221914, now seen corresponding path program 1 times [2021-11-23 03:39:57,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:57,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698737089] [2021-11-23 03:39:57,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:57,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:57,401 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:39:57,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041737996] [2021-11-23 03:39:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:57,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:39:57,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:39:57,407 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:39:57,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:39:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:57,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 03:39:57,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:39:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:39:57,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:39:57,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:57,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698737089] [2021-11-23 03:39:57,750 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:39:57,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041737996] [2021-11-23 03:39:57,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041737996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:57,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:57,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 03:39:57,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495457961] [2021-11-23 03:39:57,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:57,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:39:57,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:57,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:39:57,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:39:57,754 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:39:57,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:57,821 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-23 03:39:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:39:57,822 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-11-23 03:39:57,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:57,823 INFO L225 Difference]: With dead ends: 28 [2021-11-23 03:39:57,823 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 03:39:57,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:39:57,825 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:57,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 68 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:39:57,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 03:39:57,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-11-23 03:39:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:39:57,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-23 03:39:57,834 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-11-23 03:39:57,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:57,835 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-23 03:39:57,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:39:57,835 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-23 03:39:57,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:39:57,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:57,837 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:39:57,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:39:58,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:39:58,059 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:39:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1562521278, now seen corresponding path program 1 times [2021-11-23 03:39:58,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:58,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119829104] [2021-11-23 03:39:58,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:58,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:58,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:39:58,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287765979] [2021-11-23 03:39:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:58,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:39:58,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:39:58,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:39:58,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:39:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:58,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:39:58,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:39:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:39:58,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:39:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:39:58,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:58,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119829104] [2021-11-23 03:39:58,522 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:39:58,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287765979] [2021-11-23 03:39:58,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287765979] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:39:58,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [70679686] [2021-11-23 03:39:58,550 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 03:39:58,550 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:39:58,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:39:58,560 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:39:58,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:39:59,096 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2021-11-23 03:39:59,117 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:39:59,168 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:40:00,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [70679686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:00,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:40:00,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8, 8] total 21 [2021-11-23 03:40:00,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662780269] [2021-11-23 03:40:00,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:00,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:40:00,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:00,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:40:00,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:40:00,495 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:40:00,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:00,627 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-11-23 03:40:00,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:40:00,628 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2021-11-23 03:40:00,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:00,629 INFO L225 Difference]: With dead ends: 32 [2021-11-23 03:40:00,630 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 03:40:00,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:40:00,635 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:00,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 47 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2021-11-23 03:40:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 03:40:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-23 03:40:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:40:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-23 03:40:00,657 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2021-11-23 03:40:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:00,658 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-23 03:40:00,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:40:00,659 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-23 03:40:00,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:40:00,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:00,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:00,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:00,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:00,863 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:00,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:00,864 INFO L85 PathProgramCache]: Analyzing trace with hash -182192907, now seen corresponding path program 1 times [2021-11-23 03:40:00,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:00,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230857668] [2021-11-23 03:40:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:00,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:00,875 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:40:00,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395647069] [2021-11-23 03:40:00,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:00,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:00,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:00,876 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:00,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:40:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:00,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:40:00,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:40:00,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:40:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:40:01,045 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:01,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230857668] [2021-11-23 03:40:01,045 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:40:01,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395647069] [2021-11-23 03:40:01,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395647069] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:40:01,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [288877409] [2021-11-23 03:40:01,058 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 03:40:01,059 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:40:01,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:40:01,060 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:40:01,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:40:02,474 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 75 for LOIs [2021-11-23 03:40:03,162 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:40:03,194 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:40:04,293 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '630#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 03:40:04,293 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:40:04,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:40:04,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-11-23 03:40:04,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283251333] [2021-11-23 03:40:04,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:40:04,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:40:04,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:04,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:40:04,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:40:04,295 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-23 03:40:04,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:04,384 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-11-23 03:40:04,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:40:04,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 22 [2021-11-23 03:40:04,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:04,386 INFO L225 Difference]: With dead ends: 56 [2021-11-23 03:40:04,386 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 03:40:04,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:40:04,387 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:04,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 69 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:40:04,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 03:40:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-11-23 03:40:04,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 03:40:04,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-11-23 03:40:04,397 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 22 [2021-11-23 03:40:04,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:04,397 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-11-23 03:40:04,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-23 03:40:04,398 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-11-23 03:40:04,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:40:04,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:04,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:04,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:04,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:04,615 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:04,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:04,615 INFO L85 PathProgramCache]: Analyzing trace with hash -180405447, now seen corresponding path program 1 times [2021-11-23 03:40:04,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:04,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999519323] [2021-11-23 03:40:04,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:04,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:04,622 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:40:04,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803806874] [2021-11-23 03:40:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:04,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:04,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:04,624 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:04,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:40:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:04,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 03:40:04,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:40:04,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:40:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:40:05,017 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:05,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999519323] [2021-11-23 03:40:05,017 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:40:05,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803806874] [2021-11-23 03:40:05,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803806874] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:40:05,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485540689] [2021-11-23 03:40:05,020 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:40:05,021 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:40:05,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:40:05,021 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:40:05,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:40:06,019 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2021-11-23 03:40:06,311 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:40:06,338 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:40:07,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '927#(and (exists ((|v_ULTIMATE.start_main_~y3~0#1_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_main_~y2~0#1_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_main_~x2~0#1_BEFORE_CALL_44| Int) (|v_ULTIMATE.start_main_~y1~0#1_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_main_~x1~0#1_BEFORE_CALL_43| Int)) (and (<= |v_ULTIMATE.start_main_~x1~0#1_BEFORE_CALL_43| 2147483647) (<= 0 |v_ULTIMATE.start_main_~y1~0#1_BEFORE_CALL_27|) (<= |v_ULTIMATE.start_main_~x2~0#1_BEFORE_CALL_44| 2147483647) (= (ite (= |v_ULTIMATE.start_main_~x1~0#1_BEFORE_CALL_43| (+ (* |v_ULTIMATE.start_main_~y1~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~x2~0#1_BEFORE_CALL_44|) |v_ULTIMATE.start_main_~y3~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y2~0#1_BEFORE_CALL_27|)) 1 0) |__VERIFIER_assert_#in~cond|) (<= 0 (+ 2147483648 |v_ULTIMATE.start_main_~x2~0#1_BEFORE_CALL_44|)) (<= 0 (+ |v_ULTIMATE.start_main_~x1~0#1_BEFORE_CALL_43| 2147483648)) (<= 0 |v_ULTIMATE.start_main_~y2~0#1_BEFORE_CALL_27|) (<= |v_ULTIMATE.start_main_~y3~0#1_BEFORE_CALL_26| 2147483647) (or (and (= |#NULL.offset| 0) (= 0 |v_ULTIMATE.start_main_~y2~0#1_BEFORE_CALL_27|) (= |#NULL.base| 0)) (and (= |#NULL.offset| 0) (= |#NULL.base| 0))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (< ~counter~0 51) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 03:40:07,299 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:40:07,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:40:07,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-11-23 03:40:07,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415868973] [2021-11-23 03:40:07,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:40:07,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:40:07,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:07,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:40:07,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:40:07,300 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 03:40:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:07,393 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-11-23 03:40:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:40:07,393 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2021-11-23 03:40:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:07,394 INFO L225 Difference]: With dead ends: 59 [2021-11-23 03:40:07,395 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 03:40:07,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:40:07,396 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:07,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 85 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:40:07,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 03:40:07,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-11-23 03:40:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 03:40:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-11-23 03:40:07,405 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 22 [2021-11-23 03:40:07,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:07,406 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-11-23 03:40:07,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 03:40:07,406 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-11-23 03:40:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:40:07,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:07,407 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:07,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:07,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:07,611 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:07,611 INFO L85 PathProgramCache]: Analyzing trace with hash 408559265, now seen corresponding path program 1 times [2021-11-23 03:40:07,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:07,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074309514] [2021-11-23 03:40:07,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:07,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:07,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:40:07,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587878241] [2021-11-23 03:40:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:07,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:07,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:07,622 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:07,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:40:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:07,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:40:07,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:40:07,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:40:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:40:07,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:07,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074309514] [2021-11-23 03:40:07,884 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:40:07,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587878241] [2021-11-23 03:40:07,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587878241] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:40:07,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [906934550] [2021-11-23 03:40:07,889 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 03:40:07,889 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:40:07,891 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:40:07,891 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:40:07,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:40:10,401 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2021-11-23 03:40:10,795 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:40:10,823 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:40:11,807 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1260#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:40:11,808 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:40:11,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:40:11,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-23 03:40:11,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146705704] [2021-11-23 03:40:11,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:40:11,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:40:11,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:11,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:40:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:40:11,809 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 03:40:11,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:11,983 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-11-23 03:40:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:40:11,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 28 [2021-11-23 03:40:11,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:11,984 INFO L225 Difference]: With dead ends: 50 [2021-11-23 03:40:11,984 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 03:40:11,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:40:11,985 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:11,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 43 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:40:11,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 03:40:11,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-23 03:40:11,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 03:40:11,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-23 03:40:11,993 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 28 [2021-11-23 03:40:11,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:11,993 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-23 03:40:11,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 03:40:11,994 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-23 03:40:11,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 03:40:11,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:11,995 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:12,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:12,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 03:40:12,199 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:12,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:12,199 INFO L85 PathProgramCache]: Analyzing trace with hash -235004718, now seen corresponding path program 2 times [2021-11-23 03:40:12,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:12,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929282754] [2021-11-23 03:40:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:12,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:12,215 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:40:12,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174033767] [2021-11-23 03:40:12,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:40:12,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:12,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:12,217 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:12,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:40:12,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 03:40:12,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:40:12,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 03:40:12,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:40:12,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:40:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 03:40:12,548 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:12,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929282754] [2021-11-23 03:40:12,549 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:40:12,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174033767] [2021-11-23 03:40:12,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174033767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:40:12,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1844459455] [2021-11-23 03:40:12,551 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 03:40:12,551 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:40:12,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:40:12,552 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:40:12,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:40:14,960 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2021-11-23 03:40:15,365 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:40:15,391 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:40:16,337 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1695#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:40:16,337 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:40:16,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:40:16,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-11-23 03:40:16,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119981389] [2021-11-23 03:40:16,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:40:16,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:40:16,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:16,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:40:16,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:40:16,339 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-23 03:40:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:16,551 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2021-11-23 03:40:16,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 03:40:16,554 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 46 [2021-11-23 03:40:16,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:16,555 INFO L225 Difference]: With dead ends: 98 [2021-11-23 03:40:16,555 INFO L226 Difference]: Without dead ends: 93 [2021-11-23 03:40:16,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 03:40:16,557 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:16,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 111 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:40:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-23 03:40:16,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-23 03:40:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-23 03:40:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-11-23 03:40:16,570 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 46 [2021-11-23 03:40:16,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:16,571 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-11-23 03:40:16,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-23 03:40:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-11-23 03:40:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 03:40:16,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:16,574 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:16,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:16,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 03:40:16,799 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:16,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1419782260, now seen corresponding path program 3 times [2021-11-23 03:40:16,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:16,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816029574] [2021-11-23 03:40:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:16,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:16,808 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:40:16,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555848680] [2021-11-23 03:40:16,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:40:16,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:16,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:16,809 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:16,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:40:16,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:40:16,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:40:16,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:40:16,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:40:17,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:40:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-23 03:40:17,509 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:17,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816029574] [2021-11-23 03:40:17,510 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:40:17,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555848680] [2021-11-23 03:40:17,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555848680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:40:17,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1131099342] [2021-11-23 03:40:17,512 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 03:40:17,512 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:40:17,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:40:17,513 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:40:17,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:40:18,764 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2021-11-23 03:40:19,139 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:40:19,161 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:40:20,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2575#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:40:20,161 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:40:20,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:40:20,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-23 03:40:20,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135047109] [2021-11-23 03:40:20,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:40:20,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 03:40:20,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:20,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 03:40:20,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=1051, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 03:40:20,164 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2021-11-23 03:40:20,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:20,781 INFO L93 Difference]: Finished difference Result 194 states and 206 transitions. [2021-11-23 03:40:20,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-23 03:40:20,782 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 94 [2021-11-23 03:40:20,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:20,785 INFO L225 Difference]: With dead ends: 194 [2021-11-23 03:40:20,786 INFO L226 Difference]: Without dead ends: 189 [2021-11-23 03:40:20,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=946, Invalid=2594, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 03:40:20,791 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 150 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:20,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 190 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:40:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-23 03:40:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-11-23 03:40:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 25 states have call successors, (25), 24 states have call predecessors, (25), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-23 03:40:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2021-11-23 03:40:20,841 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 94 [2021-11-23 03:40:20,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:20,844 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2021-11-23 03:40:20,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2021-11-23 03:40:20,844 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2021-11-23 03:40:20,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-23 03:40:20,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:20,851 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:20,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:21,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:21,076 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:21,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:21,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1763378944, now seen corresponding path program 4 times [2021-11-23 03:40:21,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:21,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558315613] [2021-11-23 03:40:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:21,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:21,098 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:40:21,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726078508] [2021-11-23 03:40:21,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:40:21,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:21,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:21,101 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:21,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:40:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:21,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 03:40:21,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:40:21,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:40:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 44 proven. 968 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2021-11-23 03:40:22,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:22,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558315613] [2021-11-23 03:40:22,872 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:40:22,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726078508] [2021-11-23 03:40:22,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726078508] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:40:22,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1997604968] [2021-11-23 03:40:22,883 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 03:40:22,883 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:40:22,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:40:22,884 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:40:22,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:40:25,057 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2021-11-23 03:40:25,370 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:40:25,392 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:40:26,910 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4343#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 03:40:26,910 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:40:26,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:40:26,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2021-11-23 03:40:26,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642430635] [2021-11-23 03:40:26,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:40:26,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-23 03:40:26,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:26,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-23 03:40:26,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=2503, Unknown=0, NotChecked=0, Total=3906 [2021-11-23 03:40:26,915 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2021-11-23 03:40:28,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:28,545 INFO L93 Difference]: Finished difference Result 386 states and 410 transitions. [2021-11-23 03:40:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-23 03:40:28,545 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) Word has length 190 [2021-11-23 03:40:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:28,549 INFO L225 Difference]: With dead ends: 386 [2021-11-23 03:40:28,549 INFO L226 Difference]: Without dead ends: 381 [2021-11-23 03:40:28,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 506 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2863 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3586, Invalid=7970, Unknown=0, NotChecked=0, Total=11556 [2021-11-23 03:40:28,554 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 570 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:28,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 266 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:40:28,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-23 03:40:28,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2021-11-23 03:40:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 284 states have (on average 1.0035211267605635) internal successors, (285), 284 states have internal predecessors, (285), 49 states have call successors, (49), 48 states have call predecessors, (49), 47 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-23 03:40:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 382 transitions. [2021-11-23 03:40:28,585 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 382 transitions. Word has length 190 [2021-11-23 03:40:28,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:28,586 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 382 transitions. [2021-11-23 03:40:28,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2021-11-23 03:40:28,587 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 382 transitions. [2021-11-23 03:40:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2021-11-23 03:40:28,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:28,600 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:28,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:28,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:28,819 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:28,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:28,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1767238632, now seen corresponding path program 5 times [2021-11-23 03:40:28,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:28,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261149102] [2021-11-23 03:40:28,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:28,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:28,842 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:40:28,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586963201] [2021-11-23 03:40:28,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:40:28,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:28,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:28,844 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:28,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:40:29,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-23 03:40:29,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:40:29,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-23 03:40:29,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8466 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:40:31,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:40:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8466 backedges. 92 proven. 4232 refuted. 0 times theorem prover too weak. 4142 trivial. 0 not checked. [2021-11-23 03:40:31,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:31,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261149102] [2021-11-23 03:40:31,876 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:40:31,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586963201] [2021-11-23 03:40:31,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586963201] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:40:31,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83234193] [2021-11-23 03:40:31,878 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 03:40:31,878 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:40:31,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:40:31,878 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:40:31,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:40:34,099 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2021-11-23 03:40:34,450 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 03:40:34,476 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:40:36,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7843#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:40:36,263 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:40:36,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:40:36,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 54 [2021-11-23 03:40:36,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964903887] [2021-11-23 03:40:36,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:40:36,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-23 03:40:36,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:36,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-23 03:40:36,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1621, Invalid=2801, Unknown=0, NotChecked=0, Total=4422 [2021-11-23 03:40:36,268 INFO L87 Difference]: Start difference. First operand 381 states and 382 transitions. Second operand has 54 states, 54 states have (on average 5.574074074074074) internal successors, (301), 54 states have internal predecessors, (301), 51 states have call successors, (97), 49 states have call predecessors, (97), 48 states have return successors, (96), 50 states have call predecessors, (96), 50 states have call successors, (96) [2021-11-23 03:40:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:37,914 INFO L93 Difference]: Finished difference Result 418 states and 422 transitions. [2021-11-23 03:40:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-23 03:40:37,915 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.574074074074074) internal successors, (301), 54 states have internal predecessors, (301), 51 states have call successors, (97), 49 states have call predecessors, (97), 48 states have return successors, (96), 50 states have call predecessors, (96), 50 states have call successors, (96) Word has length 382 [2021-11-23 03:40:37,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:37,919 INFO L225 Difference]: With dead ends: 418 [2021-11-23 03:40:37,919 INFO L226 Difference]: Without dead ends: 413 [2021-11-23 03:40:37,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1193 GetRequests, 1077 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4216, Invalid=9124, Unknown=0, NotChecked=0, Total=13340 [2021-11-23 03:40:37,924 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 299 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:37,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 296 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:40:37,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-23 03:40:37,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2021-11-23 03:40:37,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 308 states have (on average 1.0032467532467533) internal successors, (309), 308 states have internal predecessors, (309), 53 states have call successors, (53), 52 states have call predecessors, (53), 51 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-23 03:40:37,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 414 transitions. [2021-11-23 03:40:37,957 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 414 transitions. Word has length 382 [2021-11-23 03:40:37,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:37,960 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 414 transitions. [2021-11-23 03:40:37,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.574074074074074) internal successors, (301), 54 states have internal predecessors, (301), 51 states have call successors, (97), 49 states have call predecessors, (97), 48 states have return successors, (96), 50 states have call predecessors, (96), 50 states have call successors, (96) [2021-11-23 03:40:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 414 transitions. [2021-11-23 03:40:37,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-11-23 03:40:37,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:37,974 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 50, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:37,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:38,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:38,181 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:38,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:38,182 INFO L85 PathProgramCache]: Analyzing trace with hash 507169892, now seen corresponding path program 6 times [2021-11-23 03:40:38,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:38,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20455929] [2021-11-23 03:40:38,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:38,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:38,217 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:40:38,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968316977] [2021-11-23 03:40:38,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:40:38,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:38,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:38,236 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:38,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:40:38,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:40:38,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-23 03:40:38,661 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 03:40:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:40:39,109 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 03:40:39,109 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 03:40:39,110 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:40:39,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:39,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 03:40:39,341 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:39,345 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:40:39,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:40:39 BoogieIcfgContainer [2021-11-23 03:40:39,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:40:39,511 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:40:39,512 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:40:39,512 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:40:39,512 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:39:56" (3/4) ... [2021-11-23 03:40:39,514 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 03:40:39,658 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:40:39,658 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:40:39,659 INFO L158 Benchmark]: Toolchain (without parser) took 43595.10ms. Allocated memory was 104.9MB in the beginning and 383.8MB in the end (delta: 278.9MB). Free memory was 74.7MB in the beginning and 290.9MB in the end (delta: -216.2MB). Peak memory consumption was 64.0MB. Max. memory is 16.1GB. [2021-11-23 03:40:39,659 INFO L158 Benchmark]: CDTParser took 0.66ms. Allocated memory is still 77.6MB. Free memory was 39.7MB in the beginning and 39.7MB in the end (delta: 40.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:40:39,659 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.26ms. Allocated memory is still 104.9MB. Free memory was 74.5MB in the beginning and 81.3MB in the end (delta: -6.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:40:39,660 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.15ms. Allocated memory is still 104.9MB. Free memory was 81.3MB in the beginning and 80.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:40:39,660 INFO L158 Benchmark]: Boogie Preprocessor took 20.58ms. Allocated memory is still 104.9MB. Free memory was 80.0MB in the beginning and 78.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:40:39,661 INFO L158 Benchmark]: RCFGBuilder took 255.24ms. Allocated memory is still 104.9MB. Free memory was 78.8MB in the beginning and 68.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:40:39,661 INFO L158 Benchmark]: TraceAbstraction took 42883.78ms. Allocated memory was 104.9MB in the beginning and 383.8MB in the end (delta: 278.9MB). Free memory was 68.4MB in the beginning and 308.7MB in the end (delta: -240.3MB). Peak memory consumption was 41.6MB. Max. memory is 16.1GB. [2021-11-23 03:40:39,661 INFO L158 Benchmark]: Witness Printer took 146.80ms. Allocated memory is still 383.8MB. Free memory was 308.7MB in the beginning and 290.9MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-23 03:40:39,663 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.66ms. Allocated memory is still 77.6MB. Free memory was 39.7MB in the beginning and 39.7MB in the end (delta: 40.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 251.26ms. Allocated memory is still 104.9MB. Free memory was 74.5MB in the beginning and 81.3MB in the end (delta: -6.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.15ms. Allocated memory is still 104.9MB. Free memory was 81.3MB in the beginning and 80.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.58ms. Allocated memory is still 104.9MB. Free memory was 80.0MB in the beginning and 78.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 255.24ms. Allocated memory is still 104.9MB. Free memory was 78.8MB in the beginning and 68.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 42883.78ms. Allocated memory was 104.9MB in the beginning and 383.8MB in the end (delta: 278.9MB). Free memory was 68.4MB in the beginning and 308.7MB in the end (delta: -240.3MB). Peak memory consumption was 41.6MB. Max. memory is 16.1GB. * Witness Printer took 146.80ms. Allocated memory is still 383.8MB. Free memory was 308.7MB in the beginning and 290.9MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) VAL [\old(cond)=1, counter=0] [L13] COND FALSE !(!cond) [L29] RET assume_abort_if_not(x1 >= 0) VAL [counter=0, x1=51, x2=-1] [L30] CALL assume_abort_if_not(x2 != 0) VAL [\old(cond)=1, counter=0] [L13] COND FALSE !(!cond) [L30] RET assume_abort_if_not(x2 != 0) VAL [counter=0, x1=51, x2=-1] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0, x1=51, x2=-1, y1=0, y2=0, y3=51] [L36] EXPR counter++ VAL [counter=1, counter++=0, x1=51, x2=-1, y1=0, y2=0, y3=51] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=1, x1=51, x2=-1, y1=0, y2=0, y3=51] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=1, x1=51, x2=-1, y1=0, y2=1, y3=50] [L36] EXPR counter++ VAL [counter=2, counter++=1, x1=51, x2=-1, y1=0, y2=1, y3=50] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=2] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=2, x1=51, x2=-1, y1=0, y2=1, y3=50] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=2, x1=51, x2=-1, y1=0, y2=2, y3=49] [L36] EXPR counter++ VAL [counter=3, counter++=2, x1=51, x2=-1, y1=0, y2=2, y3=49] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=3] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=3, x1=51, x2=-1, y1=0, y2=2, y3=49] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=3, x1=51, x2=-1, y1=0, y2=3, y3=48] [L36] EXPR counter++ VAL [counter=4, counter++=3, x1=51, x2=-1, y1=0, y2=3, y3=48] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=4] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=4, x1=51, x2=-1, y1=0, y2=3, y3=48] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=4, x1=51, x2=-1, y1=0, y2=4, y3=47] [L36] EXPR counter++ VAL [counter=5, counter++=4, x1=51, x2=-1, y1=0, y2=4, y3=47] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=5] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=5, x1=51, x2=-1, y1=0, y2=4, y3=47] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=5, x1=51, x2=-1, y1=0, y2=5, y3=46] [L36] EXPR counter++ VAL [counter=6, counter++=5, x1=51, x2=-1, y1=0, y2=5, y3=46] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=6] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=6, x1=51, x2=-1, y1=0, y2=5, y3=46] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=6, x1=51, x2=-1, y1=0, y2=6, y3=45] [L36] EXPR counter++ VAL [counter=7, counter++=6, x1=51, x2=-1, y1=0, y2=6, y3=45] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=7] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=7, x1=51, x2=-1, y1=0, y2=6, y3=45] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=7, x1=51, x2=-1, y1=0, y2=7, y3=44] [L36] EXPR counter++ VAL [counter=8, counter++=7, x1=51, x2=-1, y1=0, y2=7, y3=44] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=8] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=8, x1=51, x2=-1, y1=0, y2=7, y3=44] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=8, x1=51, x2=-1, y1=0, y2=8, y3=43] [L36] EXPR counter++ VAL [counter=9, counter++=8, x1=51, x2=-1, y1=0, y2=8, y3=43] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=9] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=9, x1=51, x2=-1, y1=0, y2=8, y3=43] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=9, x1=51, x2=-1, y1=0, y2=9, y3=42] [L36] EXPR counter++ VAL [counter=10, counter++=9, x1=51, x2=-1, y1=0, y2=9, y3=42] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=10] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=10, x1=51, x2=-1, y1=0, y2=9, y3=42] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=10, x1=51, x2=-1, y1=0, y2=10, y3=41] [L36] EXPR counter++ VAL [counter=11, counter++=10, x1=51, x2=-1, y1=0, y2=10, y3=41] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=11] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=11, x1=51, x2=-1, y1=0, y2=10, y3=41] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=11, x1=51, x2=-1, y1=0, y2=11, y3=40] [L36] EXPR counter++ VAL [counter=12, counter++=11, x1=51, x2=-1, y1=0, y2=11, y3=40] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=12] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=12, x1=51, x2=-1, y1=0, y2=11, y3=40] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=12, x1=51, x2=-1, y1=0, y2=12, y3=39] [L36] EXPR counter++ VAL [counter=13, counter++=12, x1=51, x2=-1, y1=0, y2=12, y3=39] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=13] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=13, x1=51, x2=-1, y1=0, y2=12, y3=39] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=13, x1=51, x2=-1, y1=0, y2=13, y3=38] [L36] EXPR counter++ VAL [counter=14, counter++=13, x1=51, x2=-1, y1=0, y2=13, y3=38] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=14] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=14, x1=51, x2=-1, y1=0, y2=13, y3=38] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=14, x1=51, x2=-1, y1=0, y2=14, y3=37] [L36] EXPR counter++ VAL [counter=15, counter++=14, x1=51, x2=-1, y1=0, y2=14, y3=37] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=15] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=15, x1=51, x2=-1, y1=0, y2=14, y3=37] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=15, x1=51, x2=-1, y1=0, y2=15, y3=36] [L36] EXPR counter++ VAL [counter=16, counter++=15, x1=51, x2=-1, y1=0, y2=15, y3=36] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=16] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=16, x1=51, x2=-1, y1=0, y2=15, y3=36] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=16, x1=51, x2=-1, y1=0, y2=16, y3=35] [L36] EXPR counter++ VAL [counter=17, counter++=16, x1=51, x2=-1, y1=0, y2=16, y3=35] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=17] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=17, x1=51, x2=-1, y1=0, y2=16, y3=35] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=17, x1=51, x2=-1, y1=0, y2=17, y3=34] [L36] EXPR counter++ VAL [counter=18, counter++=17, x1=51, x2=-1, y1=0, y2=17, y3=34] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=18] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=18, x1=51, x2=-1, y1=0, y2=17, y3=34] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=18, x1=51, x2=-1, y1=0, y2=18, y3=33] [L36] EXPR counter++ VAL [counter=19, counter++=18, x1=51, x2=-1, y1=0, y2=18, y3=33] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=19] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=19, x1=51, x2=-1, y1=0, y2=18, y3=33] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=19, x1=51, x2=-1, y1=0, y2=19, y3=32] [L36] EXPR counter++ VAL [counter=20, counter++=19, x1=51, x2=-1, y1=0, y2=19, y3=32] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=20] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=20, x1=51, x2=-1, y1=0, y2=19, y3=32] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=20, x1=51, x2=-1, y1=0, y2=20, y3=31] [L36] EXPR counter++ VAL [counter=21, counter++=20, x1=51, x2=-1, y1=0, y2=20, y3=31] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=21] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=21] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=21, x1=51, x2=-1, y1=0, y2=20, y3=31] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=21, x1=51, x2=-1, y1=0, y2=21, y3=30] [L36] EXPR counter++ VAL [counter=22, counter++=21, x1=51, x2=-1, y1=0, y2=21, y3=30] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=22] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=22] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=22, x1=51, x2=-1, y1=0, y2=21, y3=30] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=22, x1=51, x2=-1, y1=0, y2=22, y3=29] [L36] EXPR counter++ VAL [counter=23, counter++=22, x1=51, x2=-1, y1=0, y2=22, y3=29] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=23] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=23] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=23, x1=51, x2=-1, y1=0, y2=22, y3=29] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=23, x1=51, x2=-1, y1=0, y2=23, y3=28] [L36] EXPR counter++ VAL [counter=24, counter++=23, x1=51, x2=-1, y1=0, y2=23, y3=28] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=24] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=24] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=24, x1=51, x2=-1, y1=0, y2=23, y3=28] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=24, x1=51, x2=-1, y1=0, y2=24, y3=27] [L36] EXPR counter++ VAL [counter=25, counter++=24, x1=51, x2=-1, y1=0, y2=24, y3=27] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=25] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=25] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=25, x1=51, x2=-1, y1=0, y2=24, y3=27] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=25, x1=51, x2=-1, y1=0, y2=25, y3=26] [L36] EXPR counter++ VAL [counter=26, counter++=25, x1=51, x2=-1, y1=0, y2=25, y3=26] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=26] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=26] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=26, x1=51, x2=-1, y1=0, y2=25, y3=26] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=26, x1=51, x2=-1, y1=0, y2=26, y3=25] [L36] EXPR counter++ VAL [counter=27, counter++=26, x1=51, x2=-1, y1=0, y2=26, y3=25] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=27] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=27] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=27, x1=51, x2=-1, y1=0, y2=26, y3=25] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=27, x1=51, x2=-1, y1=0, y2=27, y3=24] [L36] EXPR counter++ VAL [counter=28, counter++=27, x1=51, x2=-1, y1=0, y2=27, y3=24] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=28] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=28] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=28, x1=51, x2=-1, y1=0, y2=27, y3=24] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=28, x1=51, x2=-1, y1=0, y2=28, y3=23] [L36] EXPR counter++ VAL [counter=29, counter++=28, x1=51, x2=-1, y1=0, y2=28, y3=23] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=29] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=29] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=29, x1=51, x2=-1, y1=0, y2=28, y3=23] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=29, x1=51, x2=-1, y1=0, y2=29, y3=22] [L36] EXPR counter++ VAL [counter=30, counter++=29, x1=51, x2=-1, y1=0, y2=29, y3=22] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=30] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=30] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=30, x1=51, x2=-1, y1=0, y2=29, y3=22] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=30, x1=51, x2=-1, y1=0, y2=30, y3=21] [L36] EXPR counter++ VAL [counter=31, counter++=30, x1=51, x2=-1, y1=0, y2=30, y3=21] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=31] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=31] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=31, x1=51, x2=-1, y1=0, y2=30, y3=21] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=31, x1=51, x2=-1, y1=0, y2=31, y3=20] [L36] EXPR counter++ VAL [counter=32, counter++=31, x1=51, x2=-1, y1=0, y2=31, y3=20] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=32] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=32] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=32, x1=51, x2=-1, y1=0, y2=31, y3=20] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=32, x1=51, x2=-1, y1=0, y2=32, y3=19] [L36] EXPR counter++ VAL [counter=33, counter++=32, x1=51, x2=-1, y1=0, y2=32, y3=19] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=33] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=33] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=33, x1=51, x2=-1, y1=0, y2=32, y3=19] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=33, x1=51, x2=-1, y1=0, y2=33, y3=18] [L36] EXPR counter++ VAL [counter=34, counter++=33, x1=51, x2=-1, y1=0, y2=33, y3=18] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=34] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=34] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=34, x1=51, x2=-1, y1=0, y2=33, y3=18] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=34, x1=51, x2=-1, y1=0, y2=34, y3=17] [L36] EXPR counter++ VAL [counter=35, counter++=34, x1=51, x2=-1, y1=0, y2=34, y3=17] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=35] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=35] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=35, x1=51, x2=-1, y1=0, y2=34, y3=17] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=35, x1=51, x2=-1, y1=0, y2=35, y3=16] [L36] EXPR counter++ VAL [counter=36, counter++=35, x1=51, x2=-1, y1=0, y2=35, y3=16] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=36] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=36] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=36, x1=51, x2=-1, y1=0, y2=35, y3=16] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=36, x1=51, x2=-1, y1=0, y2=36, y3=15] [L36] EXPR counter++ VAL [counter=37, counter++=36, x1=51, x2=-1, y1=0, y2=36, y3=15] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=37] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=37] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=37, x1=51, x2=-1, y1=0, y2=36, y3=15] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=37, x1=51, x2=-1, y1=0, y2=37, y3=14] [L36] EXPR counter++ VAL [counter=38, counter++=37, x1=51, x2=-1, y1=0, y2=37, y3=14] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=38] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=38] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=38, x1=51, x2=-1, y1=0, y2=37, y3=14] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=38, x1=51, x2=-1, y1=0, y2=38, y3=13] [L36] EXPR counter++ VAL [counter=39, counter++=38, x1=51, x2=-1, y1=0, y2=38, y3=13] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=39] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=39] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=39, x1=51, x2=-1, y1=0, y2=38, y3=13] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=39, x1=51, x2=-1, y1=0, y2=39, y3=12] [L36] EXPR counter++ VAL [counter=40, counter++=39, x1=51, x2=-1, y1=0, y2=39, y3=12] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=40] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=40] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=40, x1=51, x2=-1, y1=0, y2=39, y3=12] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=40, x1=51, x2=-1, y1=0, y2=40, y3=11] [L36] EXPR counter++ VAL [counter=41, counter++=40, x1=51, x2=-1, y1=0, y2=40, y3=11] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=41] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=41] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=41, x1=51, x2=-1, y1=0, y2=40, y3=11] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=41, x1=51, x2=-1, y1=0, y2=41, y3=10] [L36] EXPR counter++ VAL [counter=42, counter++=41, x1=51, x2=-1, y1=0, y2=41, y3=10] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=42] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=42] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=42, x1=51, x2=-1, y1=0, y2=41, y3=10] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=42, x1=51, x2=-1, y1=0, y2=42, y3=9] [L36] EXPR counter++ VAL [counter=43, counter++=42, x1=51, x2=-1, y1=0, y2=42, y3=9] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=43] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=43] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=43, x1=51, x2=-1, y1=0, y2=42, y3=9] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=43, x1=51, x2=-1, y1=0, y2=43, y3=8] [L36] EXPR counter++ VAL [counter=44, counter++=43, x1=51, x2=-1, y1=0, y2=43, y3=8] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=44] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=44] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=44, x1=51, x2=-1, y1=0, y2=43, y3=8] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=44, x1=51, x2=-1, y1=0, y2=44, y3=7] [L36] EXPR counter++ VAL [counter=45, counter++=44, x1=51, x2=-1, y1=0, y2=44, y3=7] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=45] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=45] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=45, x1=51, x2=-1, y1=0, y2=44, y3=7] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=45, x1=51, x2=-1, y1=0, y2=45, y3=6] [L36] EXPR counter++ VAL [counter=46, counter++=45, x1=51, x2=-1, y1=0, y2=45, y3=6] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=46] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=46] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=46, x1=51, x2=-1, y1=0, y2=45, y3=6] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=46, x1=51, x2=-1, y1=0, y2=46, y3=5] [L36] EXPR counter++ VAL [counter=47, counter++=46, x1=51, x2=-1, y1=0, y2=46, y3=5] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=47] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=47] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=47, x1=51, x2=-1, y1=0, y2=46, y3=5] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=47, x1=51, x2=-1, y1=0, y2=47, y3=4] [L36] EXPR counter++ VAL [counter=48, counter++=47, x1=51, x2=-1, y1=0, y2=47, y3=4] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=48] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=48] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=48, x1=51, x2=-1, y1=0, y2=47, y3=4] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=48, x1=51, x2=-1, y1=0, y2=48, y3=3] [L36] EXPR counter++ VAL [counter=49, counter++=48, x1=51, x2=-1, y1=0, y2=48, y3=3] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=49] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=49] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=49, x1=51, x2=-1, y1=0, y2=48, y3=3] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=49, x1=51, x2=-1, y1=0, y2=49, y3=2] [L36] EXPR counter++ VAL [counter=50, counter++=49, x1=51, x2=-1, y1=0, y2=49, y3=2] [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=50] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=50] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=50, x1=51, x2=-1, y1=0, y2=49, y3=2] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=50, x1=51, x2=-1, y1=0, y2=50, y3=1] [L36] EXPR counter++ VAL [counter=51, counter++=50, x1=51, x2=-1, y1=0, y2=50, y3=1] [L36] COND FALSE !(counter++<50) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) VAL [\old(cond)=0, counter=51] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=51] [L18] reach_error() VAL [\old(cond)=0, cond=0, counter=51] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 42.7s, OverallIterations: 12, TraceHistogramMax: 51, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.1s, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1149 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1145 mSDsluCounter, 1232 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 29 IncrementalHoareTripleChecker+Unchecked, 1122 mSDsCounter, 483 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1257 IncrementalHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 483 mSolverCounterUnsat, 279 mSDtfsCounter, 1257 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2547 GetRequests, 2124 SyntacticMatches, 13 SemanticMatches, 410 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7655 ImplicationChecksByTransitivity, 14.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=413occurred in iteration=11, InterpolantAutomatonStates: 317, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 6.4s InterpolantComputationTime, 1259 NumberOfCodeBlocks, 1259 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 1630 ConstructedInterpolants, 0 QuantifiedInterpolants, 4174 SizeOfPredicates, 103 NumberOfNonLiveVariables, 1985 ConjunctsInSsa, 232 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 5667/21812 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.6s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 17, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 14, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 10, TOOLS_POST_CALL_TIME: 0.3s, TOOLS_POST_RETURN_APPLICATIONS: 6, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 30, TOOLS_QUANTIFIERELIM_TIME: 0.4s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 46, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 10, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 17, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 6, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 138, DAG_COMPRESSION_RETAINED_NODES: 50, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-23 03:40:39,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8452c6-d509-44bc-931a-f0a4f31bafa6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE