./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH --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 99e5cccea54789cc7c8b01ece41ae38ca7afc8c38f73e2884988b8ff4c6bfc25 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:45:46,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:45:46,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:45:47,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:45:47,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:45:47,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:45:47,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:45:47,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:45:47,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:45:47,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:45:47,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:45:47,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:45:47,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:45:47,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:45:47,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:45:47,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:45:47,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:45:47,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:45:47,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:45:47,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:45:47,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:45:47,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:45:47,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:45:47,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:45:47,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:45:47,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:45:47,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:45:47,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:45:47,099 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:45:47,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:45:47,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:45:47,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:45:47,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:45:47,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:45:47,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:45:47,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:45:47,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:45:47,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:45:47,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:45:47,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:45:47,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:45:47,110 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:45:47,137 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:45:47,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:45:47,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:45:47,138 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:45:47,139 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:45:47,139 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:45:47,139 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:45:47,139 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:45:47,140 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:45:47,140 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:45:47,140 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:45:47,140 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:45:47,141 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:45:47,141 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:45:47,141 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:45:47,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:45:47,142 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:45:47,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:45:47,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:45:47,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:45:47,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:45:47,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:45:47,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:45:47,144 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:45:47,144 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:45:47,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:45:47,145 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:45:47,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:45:47,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:45:47,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:45:47,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:45:47,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:45:47,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:45:47,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:45:47,147 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:45:47,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:45:47,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:45:47,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:45:47,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:45:47,148 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_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99e5cccea54789cc7c8b01ece41ae38ca7afc8c38f73e2884988b8ff4c6bfc25 [2021-11-03 03:45:47,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:45:47,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:45:47,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:45:47,448 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:45:47,449 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:45:47,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c [2021-11-03 03:45:47,510 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/data/4bdb9f954/1503ca1c9b1945c29a292c472ccc1826/FLAGe24ebfc29 [2021-11-03 03:45:48,023 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:45:48,024 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c [2021-11-03 03:45:48,035 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/data/4bdb9f954/1503ca1c9b1945c29a292c472ccc1826/FLAGe24ebfc29 [2021-11-03 03:45:48,380 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/data/4bdb9f954/1503ca1c9b1945c29a292c472ccc1826 [2021-11-03 03:45:48,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:45:48,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:45:48,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:45:48,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:45:48,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:45:48,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:45:48" (1/1) ... [2021-11-03 03:45:48,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce218a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:48, skipping insertion in model container [2021-11-03 03:45:48,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:45:48" (1/1) ... [2021-11-03 03:45:48,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:45:48,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:45:48,648 WARN L228 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_1547bf7b-3b11-46db-98cc-4a519cf4a77b/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c[458,471] [2021-11-03 03:45:48,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:45:48,692 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:45:48,711 WARN L228 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_1547bf7b-3b11-46db-98cc-4a519cf4a77b/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c[458,471] [2021-11-03 03:45:48,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:45:48,759 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:45:48,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:48 WrapperNode [2021-11-03 03:45:48,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:45:48,761 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:45:48,762 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:45:48,762 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:45:48,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:48" (1/1) ... [2021-11-03 03:45:48,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:48" (1/1) ... [2021-11-03 03:45:48,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:45:48,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:45:48,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:45:48,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:45:48,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:48" (1/1) ... [2021-11-03 03:45:48,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:48" (1/1) ... [2021-11-03 03:45:48,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:48" (1/1) ... [2021-11-03 03:45:48,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:48" (1/1) ... [2021-11-03 03:45:48,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:48" (1/1) ... [2021-11-03 03:45:48,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:48" (1/1) ... [2021-11-03 03:45:48,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:48" (1/1) ... [2021-11-03 03:45:48,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:45:48,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:45:48,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:45:48,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:45:48,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:48" (1/1) ... [2021-11-03 03:45:48,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:45:48,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:45:48,859 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:45:48,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:45:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 03:45:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:45:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:45:48,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:45:49,241 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:45:49,241 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-03 03:45:49,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:45:49 BoogieIcfgContainer [2021-11-03 03:45:49,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:45:49,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:45:49,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:45:49,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:45:49,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:45:48" (1/3) ... [2021-11-03 03:45:49,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@caa6307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:45:49, skipping insertion in model container [2021-11-03 03:45:49,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:48" (2/3) ... [2021-11-03 03:45:49,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@caa6307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:45:49, skipping insertion in model container [2021-11-03 03:45:49,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:45:49" (3/3) ... [2021-11-03 03:45:49,253 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound20.c [2021-11-03 03:45:49,259 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:45:49,259 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-03 03:45:49,375 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:45:49,397 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 [2021-11-03 03:45:49,397 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-03 03:45:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:45:49,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 03:45:49,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:49,433 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 03:45:49,433 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:49,444 INFO L85 PathProgramCache]: Analyzing trace with hash 81490399, now seen corresponding path program 1 times [2021-11-03 03:45:49,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:49,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715528138] [2021-11-03 03:45:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:49,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:49,591 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 03:45:49,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476859637] [2021-11-03 03:45:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:49,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:45:49,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:45:49,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:45:49,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 03:45:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:49,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:45:49,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:45:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:45:49,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:40,139 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:46:40,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715528138] [2021-11-03 03:46:40,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:46:40,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476859637] [2021-11-03 03:46:40,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476859637] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:40,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:40,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:46:40,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056376934] [2021-11-03 03:46:40,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:46:40,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:40,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:46:40,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-11-03 03:46:40,166 INFO L87 Difference]: Start difference. First operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:40,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:40,596 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2021-11-03 03:46:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:46:40,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 03:46:40,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:40,608 INFO L225 Difference]: With dead ends: 40 [2021-11-03 03:46:40,608 INFO L226 Difference]: Without dead ends: 13 [2021-11-03 03:46:40,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.5s TimeCoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-11-03 03:46:40,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-03 03:46:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-03 03:46:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-03 03:46:40,648 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 5 [2021-11-03 03:46:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:40,649 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-03 03:46:40,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-03 03:46:40,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 03:46:40,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:40,651 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:46:40,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 03:46:40,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:46:40,876 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:40,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:40,877 INFO L85 PathProgramCache]: Analyzing trace with hash 908273882, now seen corresponding path program 1 times [2021-11-03 03:46:40,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:40,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055672990] [2021-11-03 03:46:40,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:40,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:40,894 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 03:46:40,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121956284] [2021-11-03 03:46:40,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:40,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:46:40,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:46:40,896 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:46:40,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 03:46:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:40,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:46:40,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:41,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:41,122 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:46:41,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055672990] [2021-11-03 03:46:41,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:46:41,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121956284] [2021-11-03 03:46:41,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121956284] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:46:41,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1591310946] [2021-11-03 03:46:41,160 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 03:46:41,161 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:46:41,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:46:41,176 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:46:41,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:46:41,224 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,255 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:41,257 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,259 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 03:46:41,264 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:41,266 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,268 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:46:41,275 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-03 03:46:41,302 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-03 03:46:41,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:41,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:41,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:41,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 03:46:41,344 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,345 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:46:41,347 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,348 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:46:41,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:46:41,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:41,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:41,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:41,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:41,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:41,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:41,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:41,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:41,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:41,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:46:41,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 03:46:41,504 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,512 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:46:41,514 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:46:41,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:46:41,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:41,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,573 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,576 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-03 03:46:41,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:46:41,578 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-11-03 03:46:41,592 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-03 03:46:41,624 INFO L180 QuantifierPusher]: treesize reduction 23, result has 88.0 percent of original size [2021-11-03 03:46:41,634 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-03 03:46:41,644 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,659 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 132 [2021-11-03 03:46:41,667 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,673 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-11-03 03:46:41,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:41,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:41,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:41,861 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,875 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:46:41,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,891 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 235 [2021-11-03 03:46:41,922 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 358 [2021-11-03 03:46:41,946 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,968 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 446 [2021-11-03 03:46:41,984 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:41,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 451 [2021-11-03 03:46:42,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:42,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:42,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:42,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:42,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:42,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:42,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:42,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:42,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:42,170 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-11-03 03:46:42,174 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-03 03:46:42,180 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:42,188 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-03 03:46:42,193 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:42,198 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-11-03 03:46:42,209 INFO L180 QuantifierPusher]: treesize reduction 34, result has 60.5 percent of original size [2021-11-03 03:46:42,212 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-03 03:46:42,226 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-11-03 03:46:42,232 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-03 03:46:42,240 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:46:42,247 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-03 03:46:42,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:42,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:42,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:42,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:42,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:42,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:42,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:46:42,315 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:46:43,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:46:43,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-03 03:46:43,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-03 03:46:43,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724980073] [2021-11-03 03:46:43,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:46:43,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:43,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:46:43,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-11-03 03:46:43,111 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:43,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:43,192 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-11-03 03:46:43,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 03:46:43,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-03 03:46:43,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:43,193 INFO L225 Difference]: With dead ends: 35 [2021-11-03 03:46:43,193 INFO L226 Difference]: Without dead ends: 31 [2021-11-03 03:46:43,194 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-03 03:46:43,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-03 03:46:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-11-03 03:46:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:43,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-03 03:46:43,203 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 10 [2021-11-03 03:46:43,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:43,204 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-03 03:46:43,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:43,204 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-03 03:46:43,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 03:46:43,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:43,205 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-03 03:46:43,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:46:43,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-03 03:46:43,412 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:43,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:43,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1019667251, now seen corresponding path program 1 times [2021-11-03 03:46:43,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:43,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175550190] [2021-11-03 03:46:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:43,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:43,424 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 03:46:43,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500201965] [2021-11-03 03:46:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:43,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:46:43,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:46:43,426 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:46:43,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 03:46:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:43,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 03:46:43,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:43,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:47:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:02,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:47:02,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175550190] [2021-11-03 03:47:02,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:47:02,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500201965] [2021-11-03 03:47:02,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500201965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:47:02,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [918611088] [2021-11-03 03:47:02,441 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 03:47:02,441 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:47:02,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:47:02,442 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:47:02,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:47:02,449 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:02,450 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:47:02,450 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:02,451 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 03:47:02,452 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:47:02,452 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:02,453 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:47:02,455 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-03 03:47:02,459 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-03 03:47:02,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:02,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:02,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:02,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 03:47:02,471 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:02,472 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:47:02,472 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:02,473 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:47:02,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:47:02,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:02,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:02,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:02,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:02,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:02,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:02,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:02,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:02,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:02,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:02,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 03:47:02,500 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:02,502 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:47:02,503 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:02,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:47:02,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:47:02,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:02,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:02,511 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:02,513 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-03 03:47:02,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:47:02,514 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-11-03 03:47:02,518 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:02,521 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-03 03:47:02,527 INFO L180 QuantifierPusher]: treesize reduction 23, result has 88.0 percent of original size [2021-11-03 03:47:02,531 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-03 03:47:02,536 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:02,542 INFO L185 QuantifierPusher]: treesize reduction 14, result has 91.4 percent of original size 149 [2021-11-03 03:47:02,552 INFO L180 QuantifierPusher]: treesize reduction 14, result has 91.9 percent of original size [2021-11-03 03:47:02,559 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 154 [2021-11-03 03:47:02,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:02,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:02,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:02,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:02,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:02,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:02,599 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-11-03 03:47:02,610 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-03 03:47:02,613 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:02,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-03 03:47:02,626 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:02,630 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-11-03 03:47:02,638 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-11-03 03:47:02,641 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-03 03:47:02,651 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:02,662 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-11-03 03:47:02,673 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:02,678 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-03 03:47:02,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:02,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:02,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:02,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:02,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:02,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:02,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:02,729 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:47:03,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:47:03,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-03 03:47:03,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-03 03:47:03,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945887042] [2021-11-03 03:47:03,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 03:47:03,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:47:03,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 03:47:03,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=309, Unknown=1, NotChecked=0, Total=380 [2021-11-03 03:47:03,784 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:06,521 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse1 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (and (<= 1 c_ULTIMATE.start___VERIFIER_assert_~cond) (or (not (= (+ (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) .cse0 (* 2 .cse1)) (* 4 c_ULTIMATE.start_main_~x~0))) (= (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~k~0) .cse0) (< c_ULTIMATE.start_main_~c~0 c_ULTIMATE.start_main_~k~0)) (let ((.cse2 (* (- 13) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse3 (* (- 1) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse4 (* (- 6) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (or (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 1) ULTIMATE.start_main_~k~0) (= (+ (* 2 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 1) (+ ULTIMATE.start_main_~k~0 (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0))) (<= ULTIMATE.start_main_~k~0 c_ULTIMATE.start_main_~c~0))) (not (= (mod (+ .cse2 .cse3 .cse4) (- 4)) 0)) (< (+ c_ULTIMATE.start_main_~x~0 (* 3 .cse0) .cse1 1) (div (+ .cse2 .cse3 (- 4) .cse4) (- 4))))))) is different from false [2021-11-03 03:47:32,932 WARN L207 SmtUtils]: Spent 6.36 s on a formula simplification that was a NOOP. DAG size: 48 [2021-11-03 03:47:53,443 WARN L207 SmtUtils]: Spent 6.45 s on a formula simplification that was a NOOP. DAG size: 51 [2021-11-03 03:47:55,447 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (and (or (= (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~k~0) .cse0) (< c_ULTIMATE.start_main_~c~0 c_ULTIMATE.start_main_~k~0)) (let ((.cse1 (* (- 13) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse2 (* (- 1) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse3 (* (- 6) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (or (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 1) ULTIMATE.start_main_~k~0) (= (+ (* 2 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 1) (+ ULTIMATE.start_main_~k~0 (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0))) (<= ULTIMATE.start_main_~k~0 c_ULTIMATE.start_main_~c~0))) (not (= (mod (+ .cse1 .cse2 .cse3) (- 4)) 0)) (< (+ c_ULTIMATE.start_main_~x~0 (* 3 .cse0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 1) (div (+ .cse1 .cse2 (- 4) .cse3) (- 4))))))) is different from false [2021-11-03 03:47:57,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:47:57,578 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-11-03 03:47:57,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 03:47:57,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-03 03:47:57,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:47:57,579 INFO L225 Difference]: With dead ends: 31 [2021-11-03 03:47:57,579 INFO L226 Difference]: Without dead ends: 25 [2021-11-03 03:47:57,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 64.9s TimeCoverageRelationStatistics Valid=164, Invalid=579, Unknown=21, NotChecked=106, Total=870 [2021-11-03 03:47:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-03 03:47:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-03 03:47:57,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-03 03:47:57,588 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 12 [2021-11-03 03:47:57,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:47:57,589 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-03 03:47:57,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-03 03:47:57,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 03:47:57,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:47:57,590 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-03 03:47:57,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-03 03:47:57,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-03 03:47:57,808 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:47:57,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:47:57,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1641908438, now seen corresponding path program 2 times [2021-11-03 03:47:57,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:47:57,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736412985] [2021-11-03 03:47:57,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:47:57,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:47:57,817 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 03:47:57,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802681173] [2021-11-03 03:47:57,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:47:57,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:47:57,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:47:57,819 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:47:57,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 03:47:57,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 03:47:57,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:47:57,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 03:47:57,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:47:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:58,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:47:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:58,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:47:58,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736412985] [2021-11-03 03:47:58,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:47:58,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802681173] [2021-11-03 03:47:58,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802681173] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:47:58,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1135795985] [2021-11-03 03:47:58,153 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 03:47:58,153 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:47:58,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:47:58,153 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:47:58,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:47:58,169 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,170 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:47:58,172 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,172 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:47:58,174 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:47:58,175 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,175 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 03:47:58,179 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-03 03:47:58,184 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-03 03:47:58,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:58,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:58,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:58,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 03:47:58,197 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,197 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:47:58,200 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,201 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:47:58,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:47:58,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:58,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:58,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:58,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:58,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:58,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:58,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:58,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:58,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:47:58,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 03:47:58,230 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,233 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:47:58,233 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:47:58,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:47:58,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,241 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,242 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-03 03:47:58,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:47:58,243 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-11-03 03:47:58,247 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,250 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-03 03:47:58,255 INFO L180 QuantifierPusher]: treesize reduction 23, result has 88.0 percent of original size [2021-11-03 03:47:58,260 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-03 03:47:58,266 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,271 INFO L185 QuantifierPusher]: treesize reduction 6, result has 95.3 percent of original size 122 [2021-11-03 03:47:58,274 INFO L180 QuantifierPusher]: treesize reduction 6, result has 95.6 percent of original size [2021-11-03 03:47:58,277 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-03 03:47:58,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,344 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,347 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:47:58,350 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,354 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 223 [2021-11-03 03:47:58,368 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 347 [2021-11-03 03:47:58,374 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,386 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 435 [2021-11-03 03:47:58,393 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,424 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 440 [2021-11-03 03:47:58,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,504 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-11-03 03:47:58,506 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-03 03:47:58,509 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,513 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-03 03:47:58,516 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,518 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-11-03 03:47:58,524 INFO L180 QuantifierPusher]: treesize reduction 34, result has 60.5 percent of original size [2021-11-03 03:47:58,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-03 03:47:58,533 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-11-03 03:47:58,536 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-03 03:47:58,542 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:47:58,549 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-03 03:47:58,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:47:58,584 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:47:59,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:47:59,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-03 03:47:59,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-03 03:47:59,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614601675] [2021-11-03 03:47:59,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-03 03:47:59,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:47:59,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-03 03:47:59,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-11-03 03:47:59,222 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:59,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:47:59,425 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-11-03 03:47:59,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 03:47:59,426 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-03 03:47:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:47:59,427 INFO L225 Difference]: With dead ends: 71 [2021-11-03 03:47:59,427 INFO L226 Difference]: Without dead ends: 67 [2021-11-03 03:47:59,428 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-11-03 03:47:59,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-03 03:47:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2021-11-03 03:47:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-11-03 03:47:59,439 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 22 [2021-11-03 03:47:59,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:47:59,439 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-11-03 03:47:59,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:59,439 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-11-03 03:47:59,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-03 03:47:59,440 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:47:59,440 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1] [2021-11-03 03:47:59,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-03 03:47:59,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-03 03:47:59,668 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:47:59,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:47:59,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1667839023, now seen corresponding path program 2 times [2021-11-03 03:47:59,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:47:59,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623828476] [2021-11-03 03:47:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:47:59,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:47:59,678 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 03:47:59,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969452267] [2021-11-03 03:47:59,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:47:59,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:47:59,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:47:59,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:47:59,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 03:47:59,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 03:47:59,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:47:59,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-03 03:47:59,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:00,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:17,260 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* (- 13) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse1 (* (- 1) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse2 (* (- 6) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (or (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 1) ULTIMATE.start_main_~k~0) (= (+ (* 2 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 1) (+ ULTIMATE.start_main_~k~0 (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0))) (<= ULTIMATE.start_main_~k~0 c_ULTIMATE.start_main_~c~0))) (not (= (mod (+ .cse0 .cse1 .cse2) (- 4)) 0)) (< (+ c_ULTIMATE.start_main_~x~0 (* 3 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 1) (div (+ .cse0 .cse1 (- 4) .cse2) (- 4))))) is different from false [2021-11-03 03:48:21,336 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 1) ULTIMATE.start_main_~k~0) (= (+ (* 2 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 1) (+ ULTIMATE.start_main_~k~0 (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0))) (<= ULTIMATE.start_main_~k~0 c_ULTIMATE.start_main_~c~0))) (not (= (mod (+ (* (- 13) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) (* (- 1) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) (* (- 6) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (- 4)) 0))) is different from false [2021-11-03 03:48:27,422 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 2) ULTIMATE.start_main_~k~0) (<= ULTIMATE.start_main_~k~0 (+ c_ULTIMATE.start_main_~c~0 1)) (= (+ (* 4 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 4) (+ (* 2 ULTIMATE.start_main_~k~0) (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0))))) (not (= (mod (let ((.cse0 (+ c_ULTIMATE.start_main_~y~0 1))) (+ (* (- 13) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 6) .cse0 .cse0 .cse0))) (- 4)) 0))) is different from false [2021-11-03 03:48:37,583 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ c_ULTIMATE.start_main_~y~0 2))) (+ (* (- 6) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0))) (- 4)) 0)) (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 3) ULTIMATE.start_main_~k~0) (= (+ (* 3 ULTIMATE.start_main_~k~0) (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0)) (+ 9 (* 6 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (<= ULTIMATE.start_main_~k~0 (+ c_ULTIMATE.start_main_~c~0 2))))) is different from false [2021-11-03 03:48:47,730 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ c_ULTIMATE.start_main_~y~0 3))) (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 6) .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0))) (- 4)) 0)) (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 4) ULTIMATE.start_main_~k~0) (<= ULTIMATE.start_main_~k~0 (+ c_ULTIMATE.start_main_~c~0 3)) (= (+ 16 (* 8 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (+ (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0) (* 4 ULTIMATE.start_main_~k~0)))))) is different from false [2021-11-03 03:48:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 39 not checked. [2021-11-03 03:48:53,825 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:48:53,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623828476] [2021-11-03 03:48:53,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:48:53,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969452267] [2021-11-03 03:48:53,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969452267] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:48:53,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [635504301] [2021-11-03 03:48:53,828 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 03:48:53,829 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:48:53,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:48:53,829 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:48:53,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:48:53,834 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:53,835 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:48:53,836 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:53,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:48:53,837 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:48:53,838 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:53,838 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 03:48:53,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-03 03:48:53,843 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-03 03:48:53,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:48:53,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:48:53,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:48:53,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 03:48:53,855 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:53,855 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:48:53,856 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:53,856 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:48:53,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:48:53,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:53,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:53,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:48:53,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:48:53,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:48:53,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:48:53,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:48:53,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:48:53,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:48:53,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:48:53,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:48:53,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 03:48:53,880 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:53,882 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:48:53,883 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:53,883 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:48:53,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:48:53,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:53,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:53,889 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:53,891 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-03 03:48:53,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:48:53,892 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-11-03 03:48:53,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:53,898 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-03 03:48:53,902 INFO L180 QuantifierPusher]: treesize reduction 23, result has 88.0 percent of original size [2021-11-03 03:48:53,904 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 164 [2021-11-03 03:48:53,908 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:53,912 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 235 [2021-11-03 03:48:53,916 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:53,919 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-03 03:48:53,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:53,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:53,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:53,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:53,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:53,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:53,951 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:53,957 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-11-03 03:48:53,960 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:53,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 248 [2021-11-03 03:48:53,968 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:53,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 253 [2021-11-03 03:48:53,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:53,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:53,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:53,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:53,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:53,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:53,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:54,006 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-11-03 03:48:54,008 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-03 03:48:54,011 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:54,014 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-03 03:48:54,016 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:54,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-11-03 03:48:54,025 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-11-03 03:48:54,028 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-03 03:48:54,034 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:54,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-11-03 03:48:54,045 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:54,048 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-03 03:48:54,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:54,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:54,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:54,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:54,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:54,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:54,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:48:54,105 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:48:55,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:48:55,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-03 03:48:55,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-03 03:48:55,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787154643] [2021-11-03 03:48:55,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-03 03:48:55,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:48:55,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-03 03:48:55,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=517, Unknown=6, NotChecked=250, Total=870 [2021-11-03 03:48:55,028 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:56,615 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (let ((.cse2 (= (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~k~0) .cse0)) (.cse3 (< c_ULTIMATE.start_main_~c~0 c_ULTIMATE.start_main_~k~0)) (.cse1 (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (and (or (not (= (+ (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) .cse0 (* 2 .cse1)) (* 4 c_ULTIMATE.start_main_~x~0))) .cse2 .cse3) (or .cse2 (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) .cse3) (let ((.cse4 (* (- 13) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse5 (* (- 1) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0)) (.cse6 (* (- 6) c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0))) (or (forall ((ULTIMATE.start_main_~k~0 Int)) (or (< (+ c_ULTIMATE.start_main_~c~0 1) ULTIMATE.start_main_~k~0) (= (+ (* 2 c_ULTIMATE.start_main_~y~0) (* c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_main_~y~0) 1) (+ ULTIMATE.start_main_~k~0 (* c_ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~k~0))) (<= ULTIMATE.start_main_~k~0 c_ULTIMATE.start_main_~c~0))) (not (= (mod (+ .cse4 .cse5 .cse6) (- 4)) 0)) (< (+ c_ULTIMATE.start_main_~x~0 (* 3 .cse0) .cse1 1) (div (+ .cse4 .cse5 (- 4) .cse6) (- 4)))))))) is different from false [2021-11-03 03:49:58,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:49:58,666 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-11-03 03:49:58,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 03:49:58,667 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-03 03:49:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:49:58,669 INFO L225 Difference]: With dead ends: 53 [2021-11-03 03:49:58,669 INFO L226 Difference]: Without dead ends: 47 [2021-11-03 03:49:58,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 78.9s TimeCoverageRelationStatistics Valid=191, Invalid=993, Unknown=30, NotChecked=426, Total=1640 [2021-11-03 03:49:58,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-03 03:49:58,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-03 03:49:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-11-03 03:49:58,682 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 24 [2021-11-03 03:49:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:49:58,682 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-11-03 03:49:58,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:58,682 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-11-03 03:49:58,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-03 03:49:58,684 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:49:58,684 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1] [2021-11-03 03:49:58,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-03 03:49:58,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:49:58,885 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:49:58,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:49:58,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1569497815, now seen corresponding path program 3 times [2021-11-03 03:49:58,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:49:58,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630634106] [2021-11-03 03:49:58,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:49:58,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:49:58,894 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 03:49:58,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316998655] [2021-11-03 03:49:58,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 03:49:58,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:49:58,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:49:58,903 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:49:58,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 03:49:59,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 03:49:59,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:49:59,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-03 03:49:59,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:49:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:59,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:00,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:50:00,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630634106] [2021-11-03 03:50:00,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:50:00,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316998655] [2021-11-03 03:50:00,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316998655] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:50:00,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1657348929] [2021-11-03 03:50:00,889 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 03:50:00,889 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:50:00,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:50:00,889 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:50:00,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:50:00,898 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:00,899 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:50:00,899 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:00,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:50:00,900 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:50:00,900 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:00,904 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 03:50:00,905 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-03 03:50:00,912 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-03 03:50:00,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:00,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:00,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:00,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 03:50:00,922 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:00,923 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:50:00,924 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:00,924 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:50:00,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:50:00,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:00,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:00,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:00,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:00,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:00,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:00,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:00,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:00,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:00,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:00,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:00,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 03:50:00,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:00,976 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:50:00,977 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:00,977 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:50:00,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:50:00,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:00,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:00,984 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:00,986 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-03 03:50:00,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:50:00,987 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-11-03 03:50:00,990 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:00,992 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-03 03:50:00,996 INFO L180 QuantifierPusher]: treesize reduction 23, result has 88.0 percent of original size [2021-11-03 03:50:00,998 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 164 [2021-11-03 03:50:01,002 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:01,005 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-11-03 03:50:01,009 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:01,011 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-03 03:50:01,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,084 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:01,086 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:50:01,089 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:01,092 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 235 [2021-11-03 03:50:01,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 358 [2021-11-03 03:50:01,106 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:01,112 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 446 [2021-11-03 03:50:01,116 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:01,119 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 451 [2021-11-03 03:50:01,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,202 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-11-03 03:50:01,205 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-03 03:50:01,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:01,211 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-03 03:50:01,214 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:01,216 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-11-03 03:50:01,222 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-11-03 03:50:01,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-03 03:50:01,230 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:01,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-11-03 03:50:01,242 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:01,245 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-03 03:50:01,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:01,289 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:50:02,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:50:02,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-03 03:50:02,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-03 03:50:02,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713099964] [2021-11-03 03:50:02,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-03 03:50:02,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:50:02,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-03 03:50:02,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-11-03 03:50:02,295 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:05,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:50:05,442 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-11-03 03:50:05,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 03:50:05,443 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-03 03:50:05,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:50:05,444 INFO L225 Difference]: With dead ends: 53 [2021-11-03 03:50:05,444 INFO L226 Difference]: Without dead ends: 47 [2021-11-03 03:50:05,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2021-11-03 03:50:05,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-03 03:50:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-03 03:50:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:05,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-11-03 03:50:05,468 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 32 [2021-11-03 03:50:05,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:50:05,469 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-11-03 03:50:05,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:05,469 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-11-03 03:50:05,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 03:50:05,474 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:50:05,474 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-03 03:50:05,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-03 03:50:05,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:50:05,688 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:50:05,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:50:05,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1490352846, now seen corresponding path program 3 times [2021-11-03 03:50:05,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:50:05,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428327440] [2021-11-03 03:50:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:50:05,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:50:05,716 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 03:50:05,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319521587] [2021-11-03 03:50:05,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 03:50:05,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:50:05,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:50:05,718 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:50:05,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 03:50:05,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 03:50:05,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:50:05,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 03:50:05,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:50:06,250 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:06,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:06,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:50:06,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428327440] [2021-11-03 03:50:06,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:50:06,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319521587] [2021-11-03 03:50:06,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319521587] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:50:06,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [518232351] [2021-11-03 03:50:06,534 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 03:50:06,534 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:50:06,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:50:06,535 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:50:06,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:50:06,539 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,540 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:50:06,541 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,541 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 03:50:06,542 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:50:06,542 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 03:50:06,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-03 03:50:06,552 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-11-03 03:50:06,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:06,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:06,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:06,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 03:50:06,567 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,568 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:50:06,569 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,569 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 03:50:06,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 03:50:06,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:06,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:06,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:06,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:06,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:06,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:06,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:06,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:06,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:50:06,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 03:50:06,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,600 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:50:06,601 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 03:50:06,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 03:50:06,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,609 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,610 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-11-03 03:50:06,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 03:50:06,611 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:136, output treesize:111 [2021-11-03 03:50:06,616 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-03 03:50:06,622 INFO L180 QuantifierPusher]: treesize reduction 23, result has 88.0 percent of original size [2021-11-03 03:50:06,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 164 [2021-11-03 03:50:06,633 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,636 INFO L185 QuantifierPusher]: treesize reduction 8, result has 93.8 percent of original size 122 [2021-11-03 03:50:06,642 INFO L180 QuantifierPusher]: treesize reduction 8, result has 94.2 percent of original size [2021-11-03 03:50:06,644 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-03 03:50:06,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,698 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,700 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:50:06,703 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,706 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 223 [2021-11-03 03:50:06,716 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 351 [2021-11-03 03:50:06,722 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,730 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 439 [2021-11-03 03:50:06,735 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,747 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 444 [2021-11-03 03:50:06,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,814 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-11-03 03:50:06,816 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-03 03:50:06,818 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-03 03:50:06,824 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,826 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-11-03 03:50:06,831 INFO L180 QuantifierPusher]: treesize reduction 34, result has 60.5 percent of original size [2021-11-03 03:50:06,833 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-03 03:50:06,840 INFO L180 QuantifierPusher]: treesize reduction 50, result has 67.9 percent of original size [2021-11-03 03:50:06,842 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-03 03:50:06,847 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:50:06,850 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-11-03 03:50:06,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 03:50:06,887 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 03:50:07,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 03:50:07,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-03 03:50:07,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-03 03:50:07,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776246371] [2021-11-03 03:50:07,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-03 03:50:07,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:50:07,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-03 03:50:07,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2021-11-03 03:50:07,493 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:07,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:50:07,855 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2021-11-03 03:50:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-03 03:50:07,856 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-03 03:50:07,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:50:07,857 INFO L225 Difference]: With dead ends: 91 [2021-11-03 03:50:07,857 INFO L226 Difference]: Without dead ends: 87 [2021-11-03 03:50:07,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=686, Invalid=1764, Unknown=0, NotChecked=0, Total=2450 [2021-11-03 03:50:07,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-03 03:50:07,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-03 03:50:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-11-03 03:50:07,878 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 46 [2021-11-03 03:50:07,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:50:07,879 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-11-03 03:50:07,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:07,879 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-11-03 03:50:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 03:50:07,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:50:07,881 INFO L513 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1] [2021-11-03 03:50:07,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-03 03:50:08,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-11-03 03:50:08,088 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:50:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:50:08,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1024659946, now seen corresponding path program 4 times [2021-11-03 03:50:08,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:50:08,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733043026] [2021-11-03 03:50:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:50:08,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:50:08,128 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 03:50:08,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870210380] [2021-11-03 03:50:08,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 03:50:08,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:50:08,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:50:08,134 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:50:08,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-03 03:50:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 03:50:09,481 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-03 03:50:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 03:50:09,921 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-03 03:50:09,922 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-03 03:50:09,923 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 03:50:09,925 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 03:50:09,925 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 03:50:09,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-03 03:50:10,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:50:10,136 INFO L731 BasicCegarLoop]: Path program histogram: [4, 3, 1] [2021-11-03 03:50:10,140 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 03:50:10,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:50:10 BoogieIcfgContainer [2021-11-03 03:50:10,254 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 03:50:10,255 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 03:50:10,255 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 03:50:10,255 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 03:50:10,256 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:45:49" (3/4) ... [2021-11-03 03:50:10,257 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-03 03:50:10,344 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/witness.graphml [2021-11-03 03:50:10,351 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 03:50:10,353 INFO L168 Benchmark]: Toolchain (without parser) took 261963.59 ms. Allocated memory was 113.2 MB in the beginning and 140.5 MB in the end (delta: 27.3 MB). Free memory was 82.1 MB in the beginning and 39.8 MB in the end (delta: 42.3 MB). Peak memory consumption was 68.6 MB. Max. memory is 16.1 GB. [2021-11-03 03:50:10,353 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 113.2 MB. Free memory is still 68.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:50:10,353 INFO L168 Benchmark]: CACSL2BoogieTranslator took 366.52 ms. Allocated memory was 113.2 MB in the beginning and 140.5 MB in the end (delta: 27.3 MB). Free memory was 81.8 MB in the beginning and 113.6 MB in the end (delta: -31.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 03:50:10,355 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.24 ms. Allocated memory is still 140.5 MB. Free memory was 113.6 MB in the beginning and 111.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 03:50:10,355 INFO L168 Benchmark]: Boogie Preprocessor took 22.98 ms. Allocated memory is still 140.5 MB. Free memory was 111.9 MB in the beginning and 111.0 MB in the end (delta: 976.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 03:50:10,355 INFO L168 Benchmark]: RCFGBuilder took 416.84 ms. Allocated memory is still 140.5 MB. Free memory was 111.0 MB in the beginning and 99.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 03:50:10,355 INFO L168 Benchmark]: TraceAbstraction took 261008.52 ms. Allocated memory is still 140.5 MB. Free memory was 99.9 MB in the beginning and 47.2 MB in the end (delta: 52.8 MB). Peak memory consumption was 54.9 MB. Max. memory is 16.1 GB. [2021-11-03 03:50:10,355 INFO L168 Benchmark]: Witness Printer took 96.90 ms. Allocated memory is still 140.5 MB. Free memory was 47.2 MB in the beginning and 39.8 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-03 03:50:10,357 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 113.2 MB. Free memory is still 68.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 366.52 ms. Allocated memory was 113.2 MB in the beginning and 140.5 MB in the end (delta: 27.3 MB). Free memory was 81.8 MB in the beginning and 113.6 MB in the end (delta: -31.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.24 ms. Allocated memory is still 140.5 MB. Free memory was 113.6 MB in the beginning and 111.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.98 ms. Allocated memory is still 140.5 MB. Free memory was 111.9 MB in the beginning and 111.0 MB in the end (delta: 976.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 416.84 ms. Allocated memory is still 140.5 MB. Free memory was 111.0 MB in the beginning and 99.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 261008.52 ms. Allocated memory is still 140.5 MB. Free memory was 99.9 MB in the beginning and 47.2 MB in the end (delta: 52.8 MB). Peak memory consumption was 54.9 MB. Max. memory is 16.1 GB. * Witness Printer took 96.90 ms. Allocated memory is still 140.5 MB. Free memory was 47.2 MB in the beginning and 39.8 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * 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: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [counter=0] [L27] EXPR counter++ VAL [counter=1] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=1] [L27] EXPR counter++ VAL [counter=2] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=2] [L27] EXPR counter++ VAL [counter=3] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=3] [L27] EXPR counter++ VAL [counter=4] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=4] [L27] EXPR counter++ VAL [counter=5] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=5] [L27] EXPR counter++ VAL [counter=6] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=6] [L27] EXPR counter++ VAL [counter=7] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=7] [L27] EXPR counter++ VAL [counter=8] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=8] [L27] EXPR counter++ VAL [counter=9] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=9] [L27] EXPR counter++ VAL [counter=10] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=10] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=10] [L27] EXPR counter++ VAL [counter=11] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=11] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=11] [L27] EXPR counter++ VAL [counter=12] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=12] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=12] [L27] EXPR counter++ VAL [counter=13] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=13] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=13] [L27] EXPR counter++ VAL [counter=14] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=14] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=14] [L27] EXPR counter++ VAL [counter=15] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=15] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=15] [L27] EXPR counter++ VAL [counter=16] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=16] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=16] [L27] EXPR counter++ VAL [counter=17] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=17] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=17] [L27] EXPR counter++ VAL [counter=18] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=18] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=18] [L27] EXPR counter++ VAL [counter=19] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=19] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=19] [L27] EXPR counter++ VAL [counter=20] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=20] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=20] [L27] EXPR counter++ VAL [counter=21] [L27] COND FALSE !(counter++<20) [L10] COND TRUE !(cond) VAL [counter=21] [L12] reach_error() VAL [counter=21] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 260.7s, OverallIterations: 8, TraceHistogramMax: 21, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 121.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 67 SDtfs, 226 SDslu, 408 SDs, 0 SdLazy, 465 SolverSat, 96 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 7.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 500 GetRequests, 295 SyntacticMatches, 6 SemanticMatches, 199 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 201.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=7, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 28 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 126.0s InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 288 ConstructedInterpolants, 44 QuantifiedInterpolants, 3385 SizeOfPredicates, 42 NumberOfNonLiveVariables, 831 ConjunctsInSsa, 132 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 0/724 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: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-03 03:50:10,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1547bf7b-3b11-46db-98cc-4a519cf4a77b/bin/utaipan-aC7eJsxGYH/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