./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS --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 e46fdb43c1704e8aa9295c108b22e9521ffebb273e9060ca31abf40569948ab2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:10:53,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:10:53,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:10:53,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:10:53,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:10:53,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:10:53,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:10:53,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:10:53,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:10:53,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:10:53,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:10:53,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:10:53,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:10:53,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:10:53,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:10:53,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:10:53,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:10:53,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:10:53,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:10:53,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:10:53,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:10:53,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:10:53,692 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:10:53,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:10:53,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:10:53,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:10:53,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:10:53,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:10:53,699 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:10:53,700 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:10:53,700 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:10:53,701 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:10:53,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:10:53,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:10:53,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:10:53,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:10:53,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:10:53,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:10:53,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:10:53,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:10:53,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:10:53,720 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:10:53,766 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:10:53,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:10:53,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:10:53,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:10:53,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:10:53,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:10:53,768 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:10:53,768 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:10:53,768 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:10:53,768 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:10:53,768 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:10:53,769 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:10:53,769 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:10:53,769 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:10:53,769 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:10:53,769 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:10:53,770 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:10:53,770 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:10:53,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:10:53,771 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:10:53,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:10:53,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:10:53,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:10:53,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:10:53,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:10:53,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:10:53,772 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:10:53,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:10:53,772 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:10:53,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:10:53,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:10:53,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:10:53,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:10:53,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:10:53,773 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:10:53,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:10:53,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:10:53,774 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:10:53,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:10:53,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:10:53,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:10:53,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e46fdb43c1704e8aa9295c108b22e9521ffebb273e9060ca31abf40569948ab2 [2022-11-19 08:10:54,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:10:54,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:10:54,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:10:54,083 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:10:54,087 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:10:54,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2022-11-19 08:10:54,180 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/data/21f9133c3/85ef07abcfd240b9a77291db5bb14093/FLAG4999da197 [2022-11-19 08:10:54,759 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:10:54,766 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2022-11-19 08:10:54,772 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/data/21f9133c3/85ef07abcfd240b9a77291db5bb14093/FLAG4999da197 [2022-11-19 08:10:55,153 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/data/21f9133c3/85ef07abcfd240b9a77291db5bb14093 [2022-11-19 08:10:55,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:10:55,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:10:55,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:10:55,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:10:55,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:10:55,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:10:55" (1/1) ... [2022-11-19 08:10:55,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3793326f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:55, skipping insertion in model container [2022-11-19 08:10:55,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:10:55" (1/1) ... [2022-11-19 08:10:55,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:10:55,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:10:55,390 WARN L234 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_30319a09-6083-44e2-9b07-56c3c8ac466b/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i[951,964] [2022-11-19 08:10:55,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:10:55,428 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:10:55,449 WARN L234 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_30319a09-6083-44e2-9b07-56c3c8ac466b/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i[951,964] [2022-11-19 08:10:55,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:10:55,482 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:10:55,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:55 WrapperNode [2022-11-19 08:10:55,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:10:55,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:10:55,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:10:55,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:10:55,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:55" (1/1) ... [2022-11-19 08:10:55,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:55" (1/1) ... [2022-11-19 08:10:55,525 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2022-11-19 08:10:55,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:10:55,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:10:55,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:10:55,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:10:55,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:55" (1/1) ... [2022-11-19 08:10:55,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:55" (1/1) ... [2022-11-19 08:10:55,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:55" (1/1) ... [2022-11-19 08:10:55,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:55" (1/1) ... [2022-11-19 08:10:55,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:55" (1/1) ... [2022-11-19 08:10:55,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:55" (1/1) ... [2022-11-19 08:10:55,558 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:55" (1/1) ... [2022-11-19 08:10:55,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:55" (1/1) ... [2022-11-19 08:10:55,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:10:55,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:10:55,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:10:55,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:10:55,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:55" (1/1) ... [2022-11-19 08:10:55,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:10:55,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:55,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:10:55,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:10:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:10:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:10:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:10:55,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:10:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 08:10:55,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 08:10:55,737 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:10:55,741 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:10:55,961 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:10:56,021 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:10:56,022 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 08:10:56,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:10:56 BoogieIcfgContainer [2022-11-19 08:10:56,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:10:56,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:10:56,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:10:56,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:10:56,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:10:55" (1/3) ... [2022-11-19 08:10:56,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131671a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:10:56, skipping insertion in model container [2022-11-19 08:10:56,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:55" (2/3) ... [2022-11-19 08:10:56,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131671a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:10:56, skipping insertion in model container [2022-11-19 08:10:56,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:10:56" (3/3) ... [2022-11-19 08:10:56,053 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound5.i [2022-11-19 08:10:56,088 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:10:56,088 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:10:56,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:10:56,199 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4aa12fd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:10:56,199 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:10:56,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:10:56,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:10:56,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:56,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:56,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:56,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:56,225 INFO L85 PathProgramCache]: Analyzing trace with hash 774102990, now seen corresponding path program 1 times [2022-11-19 08:10:56,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:56,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584188107] [2022-11-19 08:10:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:56,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:56,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:56,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584188107] [2022-11-19 08:10:56,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 08:10:56,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389645181] [2022-11-19 08:10:56,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:56,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:56,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:56,403 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:56,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:10:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:56,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-19 08:10:56,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:56,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:10:56,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389645181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:56,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:56,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:10:56,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801956835] [2022-11-19 08:10:56,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:56,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 08:10:56,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:56,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 08:10:56,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:10:56,562 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:10:56,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:56,596 INFO L93 Difference]: Finished difference Result 30 states and 43 transitions. [2022-11-19 08:10:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 08:10:56,604 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:10:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:56,612 INFO L225 Difference]: With dead ends: 30 [2022-11-19 08:10:56,612 INFO L226 Difference]: Without dead ends: 15 [2022-11-19 08:10:56,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:10:56,619 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:56,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:10:56,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-19 08:10:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-19 08:10:56,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:10:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-19 08:10:56,658 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 7 [2022-11-19 08:10:56,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:56,658 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-19 08:10:56,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:10:56,661 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-19 08:10:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:10:56,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:56,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:56,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:10:56,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 08:10:56,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1084410172, now seen corresponding path program 1 times [2022-11-19 08:10:56,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:56,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253546654] [2022-11-19 08:10:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:56,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:56,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:56,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253546654] [2022-11-19 08:10:56,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 08:10:56,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037940696] [2022-11-19 08:10:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:56,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:56,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:56,940 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:56,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:10:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:57,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:10:57,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:57,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:10:57,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037940696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:57,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:57,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:10:57,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050563524] [2022-11-19 08:10:57,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:57,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:10:57,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:57,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:10:57,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:10:57,093 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:10:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:57,119 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2022-11-19 08:10:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:10:57,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 08:10:57,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:57,121 INFO L225 Difference]: With dead ends: 28 [2022-11-19 08:10:57,121 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 08:10:57,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:10:57,123 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:57,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:10:57,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 08:10:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-19 08:10:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:10:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-19 08:10:57,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2022-11-19 08:10:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:57,140 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-19 08:10:57,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:10:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-19 08:10:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:10:57,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:57,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:57,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:10:57,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:57,351 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:57,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:57,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1068718015, now seen corresponding path program 1 times [2022-11-19 08:10:57,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:57,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64104550] [2022-11-19 08:10:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:57,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:57,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:10:57,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71136281] [2022-11-19 08:10:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:57,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:57,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:57,366 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:57,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:10:57,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:57,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:10:57,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:57,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:10:57,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:57,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64104550] [2022-11-19 08:10:57,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:10:57,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71136281] [2022-11-19 08:10:57,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71136281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:57,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:57,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:10:57,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080778572] [2022-11-19 08:10:57,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:57,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:10:57,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:57,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:10:57,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:10:57,484 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:10:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:57,538 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-19 08:10:57,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:10:57,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 08:10:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:57,540 INFO L225 Difference]: With dead ends: 28 [2022-11-19 08:10:57,540 INFO L226 Difference]: Without dead ends: 21 [2022-11-19 08:10:57,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:10:57,542 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:57,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:10:57,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-19 08:10:57,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-11-19 08:10:57,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:10:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-11-19 08:10:57,547 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2022-11-19 08:10:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:57,547 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-11-19 08:10:57,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:10:57,548 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-11-19 08:10:57,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:10:57,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:57,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:57,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:10:57,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:57,760 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:57,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1066930555, now seen corresponding path program 1 times [2022-11-19 08:10:57,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:57,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3131749] [2022-11-19 08:10:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:57,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:57,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:10:57,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043151601] [2022-11-19 08:10:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:57,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:57,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:57,783 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:57,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:10:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:57,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:10:57,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:58,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:10:58,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:58,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3131749] [2022-11-19 08:10:58,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:10:58,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043151601] [2022-11-19 08:10:58,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043151601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:58,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:58,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:10:58,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066030741] [2022-11-19 08:10:58,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:58,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:10:58,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:58,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:10:58,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:10:58,103 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:10:58,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:58,183 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-11-19 08:10:58,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:10:58,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 08:10:58,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:58,185 INFO L225 Difference]: With dead ends: 29 [2022-11-19 08:10:58,185 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 08:10:58,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:10:58,187 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:58,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:10:58,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 08:10:58,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-19 08:10:58,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:10:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-19 08:10:58,195 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 10 [2022-11-19 08:10:58,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:58,196 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-19 08:10:58,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:10:58,196 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-19 08:10:58,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:10:58,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:58,197 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:58,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:10:58,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:58,404 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:58,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:58,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1531048614, now seen corresponding path program 1 times [2022-11-19 08:10:58,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:58,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721315537] [2022-11-19 08:10:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:58,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:58,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:10:58,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163278449] [2022-11-19 08:10:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:58,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:58,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:58,418 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:58,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:10:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:58,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:10:58,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:58,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:10:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:58,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:58,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721315537] [2022-11-19 08:10:58,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:10:58,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163278449] [2022-11-19 08:10:58,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163278449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:10:58,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [799918885] [2022-11-19 08:10:58,606 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 08:10:58,606 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:10:58,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:10:58,620 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:10:58,620 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:10:59,065 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2022-11-19 08:10:59,098 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:10:59,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '470#(and (<= 6 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:10:59,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:10:59,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:10:59,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-19 08:10:59,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727710401] [2022-11-19 08:10:59,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:10:59,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:10:59,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:59,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:10:59,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:10:59,509 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:10:59,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:59,630 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-11-19 08:10:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:10:59,631 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:10:59,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:59,634 INFO L225 Difference]: With dead ends: 57 [2022-11-19 08:10:59,635 INFO L226 Difference]: Without dead ends: 46 [2022-11-19 08:10:59,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:10:59,645 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:59,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 71 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:10:59,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-19 08:10:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2022-11-19 08:10:59,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:10:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-11-19 08:10:59,659 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 12 [2022-11-19 08:10:59,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:59,659 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-11-19 08:10:59,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:10:59,660 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-11-19 08:10:59,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:10:59,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:59,660 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:59,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:10:59,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:59,861 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:59,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:59,862 INFO L85 PathProgramCache]: Analyzing trace with hash -107828201, now seen corresponding path program 1 times [2022-11-19 08:10:59,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:59,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225779099] [2022-11-19 08:10:59,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:59,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:59,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:10:59,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47851023] [2022-11-19 08:10:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:59,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:59,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:59,879 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:59,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:10:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:59,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:10:59,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:59,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:11:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:00,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:00,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225779099] [2022-11-19 08:11:00,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:11:00,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47851023] [2022-11-19 08:11:00,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47851023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:11:00,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [167950902] [2022-11-19 08:11:00,032 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 08:11:00,032 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:11:00,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:11:00,033 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:11:00,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:11:00,297 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2022-11-19 08:11:00,326 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:11:00,858 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '689#(and (<= 6 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:11:00,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:11:00,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:11:00,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-19 08:11:00,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914644981] [2022-11-19 08:11:00,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:11:00,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:11:00,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:00,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:11:00,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:11:00,861 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:00,976 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2022-11-19 08:11:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:11:00,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 08:11:00,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:00,978 INFO L225 Difference]: With dead ends: 67 [2022-11-19 08:11:00,979 INFO L226 Difference]: Without dead ends: 60 [2022-11-19 08:11:00,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:11:00,980 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:00,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 94 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:11:00,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-19 08:11:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-11-19 08:11:00,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.302325581395349) internal successors, (56), 46 states have internal predecessors, (56), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:11:00,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-11-19 08:11:00,989 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 13 [2022-11-19 08:11:00,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:00,989 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-11-19 08:11:00,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:00,990 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-11-19 08:11:00,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:11:00,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:00,990 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:01,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:11:01,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 08:11:01,196 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:01,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:01,197 INFO L85 PathProgramCache]: Analyzing trace with hash -106040741, now seen corresponding path program 1 times [2022-11-19 08:11:01,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:01,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179733917] [2022-11-19 08:11:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:01,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:01,216 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:11:01,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734943451] [2022-11-19 08:11:01,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:01,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:01,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:11:01,221 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:11:01,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:11:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:01,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:11:01,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:01,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:11:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:03,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:03,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179733917] [2022-11-19 08:11:03,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:11:03,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734943451] [2022-11-19 08:11:03,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734943451] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:11:03,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:11:03,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2022-11-19 08:11:03,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212936841] [2022-11-19 08:11:03,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:03,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:11:03,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:03,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:11:03,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:11:03,155 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:03,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:03,716 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2022-11-19 08:11:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:11:03,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 08:11:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:03,718 INFO L225 Difference]: With dead ends: 91 [2022-11-19 08:11:03,718 INFO L226 Difference]: Without dead ends: 86 [2022-11-19 08:11:03,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:11:03,719 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:03,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 107 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-19 08:11:03,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-19 08:11:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2022-11-19 08:11:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 60 states have (on average 1.2) internal successors, (72), 63 states have internal predecessors, (72), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:11:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2022-11-19 08:11:03,738 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 13 [2022-11-19 08:11:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:03,738 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2022-11-19 08:11:03,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2022-11-19 08:11:03,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:11:03,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:03,739 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:03,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-19 08:11:03,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:03,945 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:03,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:03,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1345144360, now seen corresponding path program 1 times [2022-11-19 08:11:03,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:03,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833220000] [2022-11-19 08:11:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:03,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:03,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:11:03,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130952772] [2022-11-19 08:11:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:03,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:03,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:11:03,955 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:11:03,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:11:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:04,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:11:04,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:04,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:11:04,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:04,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833220000] [2022-11-19 08:11:04,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:11:04,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130952772] [2022-11-19 08:11:04,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130952772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:04,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:04,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:11:04,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249339953] [2022-11-19 08:11:04,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:04,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:11:04,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:04,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:11:04,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:11:04,053 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:11:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:04,089 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2022-11-19 08:11:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:11:04,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-19 08:11:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:04,092 INFO L225 Difference]: With dead ends: 100 [2022-11-19 08:11:04,092 INFO L226 Difference]: Without dead ends: 61 [2022-11-19 08:11:04,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:11:04,093 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:04,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:11:04,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-19 08:11:04,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-19 08:11:04,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 08:11:04,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2022-11-19 08:11:04,130 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 18 [2022-11-19 08:11:04,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:04,130 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2022-11-19 08:11:04,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:11:04,132 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2022-11-19 08:11:04,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:11:04,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:04,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:04,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:11:04,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:04,342 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:04,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:04,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1577774082, now seen corresponding path program 1 times [2022-11-19 08:11:04,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:04,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984681494] [2022-11-19 08:11:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:04,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:04,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:11:04,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647379425] [2022-11-19 08:11:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:04,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:04,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:11:04,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:11:04,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:11:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:04,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 08:11:04,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:04,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:11:11,324 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296))) (or (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296))) (<= .cse1 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (let ((.cse4 (* 2 (* (div .cse1 2) |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse2 (+ .cse4 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse3 (* (div .cse2 4294967296) 4294967296))) (and (< .cse2 (+ .cse0 .cse3 1)) (< (+ .cse0 .cse3) (+ .cse4 |c_ULTIMATE.start_main_~r~0#1| 1)))))))) is different from true [2022-11-19 08:11:31,223 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse4 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse5 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (let ((.cse3 (* (* .cse4 |c_ULTIMATE.start_main_~q~0#1|) 2))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~r~0#1| .cse3))) (let ((.cse2 (* (div .cse0 4294967296) 4294967296))) (and (< .cse0 (+ .cse1 .cse2 1)) (< (+ .cse1 .cse2) (+ |c_ULTIMATE.start_main_~r~0#1| .cse3 1)))))) (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse1)) (<= (* 2 .cse4) .cse5) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse5)))) is different from true [2022-11-19 08:12:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-19 08:12:03,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:03,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984681494] [2022-11-19 08:12:03,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:12:03,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647379425] [2022-11-19 08:12:03,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647379425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:03,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1202408870] [2022-11-19 08:12:03,882 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:12:03,882 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:03,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:03,883 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:03,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:05,019 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2022-11-19 08:12:05,041 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:07,311 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1609#(and (<= 2 ~counter~0) (<= ~counter~0 6) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:07,311 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:07,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:12:07,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-19 08:12:07,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663234243] [2022-11-19 08:12:07,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:07,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 08:12:07,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:07,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 08:12:07,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=558, Unknown=2, NotChecked=98, Total=756 [2022-11-19 08:12:07,313 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:12:10,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:12:11,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:12:16,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:12:18,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:12:20,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:12:24,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:12:25,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:12:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:25,465 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2022-11-19 08:12:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:12:25,466 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-11-19 08:12:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:25,468 INFO L225 Difference]: With dead ends: 76 [2022-11-19 08:12:25,468 INFO L226 Difference]: Without dead ends: 71 [2022-11-19 08:12:25,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=123, Invalid=695, Unknown=2, NotChecked=110, Total=930 [2022-11-19 08:12:25,469 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 21 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:25,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 131 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 203 Invalid, 3 Unknown, 76 Unchecked, 16.4s Time] [2022-11-19 08:12:25,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-19 08:12:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2022-11-19 08:12:25,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.127659574468085) internal successors, (53), 50 states have internal predecessors, (53), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 08:12:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-11-19 08:12:25,492 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 21 [2022-11-19 08:12:25,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:25,492 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-11-19 08:12:25,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:12:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-11-19 08:12:25,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:12:25,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:25,493 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:25,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-19 08:12:25,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:25,700 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:25,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:25,700 INFO L85 PathProgramCache]: Analyzing trace with hash -619767620, now seen corresponding path program 2 times [2022-11-19 08:12:25,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:25,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123071075] [2022-11-19 08:12:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:25,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:25,712 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:12:25,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015806004] [2022-11-19 08:12:25,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:12:25,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:25,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:25,714 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:25,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:12:25,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 08:12:25,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:25,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:12:25,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 08:12:25,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:12:25,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:25,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123071075] [2022-11-19 08:12:25,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:12:25,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015806004] [2022-11-19 08:12:25,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015806004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:25,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:25,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:12:25,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634948152] [2022-11-19 08:12:25,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:25,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:12:25,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:25,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:12:25,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:12:25,867 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:26,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:26,017 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-11-19 08:12:26,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:12:26,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-19 08:12:26,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:26,019 INFO L225 Difference]: With dead ends: 79 [2022-11-19 08:12:26,019 INFO L226 Difference]: Without dead ends: 76 [2022-11-19 08:12:26,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:12:26,020 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:26,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:26,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-19 08:12:26,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 60. [2022-11-19 08:12:26,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.127659574468085) internal successors, (53), 50 states have internal predecessors, (53), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 08:12:26,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-11-19 08:12:26,035 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 21 [2022-11-19 08:12:26,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:26,036 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-11-19 08:12:26,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:26,036 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-11-19 08:12:26,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:12:26,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:26,037 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:26,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-19 08:12:26,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 08:12:26,242 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:26,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:26,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1162625670, now seen corresponding path program 1 times [2022-11-19 08:12:26,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:26,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25592168] [2022-11-19 08:12:26,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:26,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:26,254 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:12:26,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487421668] [2022-11-19 08:12:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:26,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:26,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:26,256 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:26,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:12:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:26,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 08:12:26,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:26,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:45,919 WARN L233 SmtUtils]: Spent 7.42s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:13:08,100 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse4 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse5 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (let ((.cse3 (* (* .cse4 |c_ULTIMATE.start_main_~q~0#1|) 2))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~r~0#1| .cse3))) (let ((.cse2 (* (div .cse0 4294967296) 4294967296))) (and (< .cse0 (+ .cse1 .cse2 1)) (< (+ .cse1 .cse2) (+ |c_ULTIMATE.start_main_~r~0#1| .cse3 1)))))) (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse1)) (<= (* 2 .cse4) .cse5) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse5)))) is different from true [2022-11-19 08:13:58,810 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse4 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824)) (.cse5 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (let ((.cse2 (* (* .cse4 |c_ULTIMATE.start_main_~q~0#1|) 4))) (let ((.cse3 (+ .cse2 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse1 (* (div .cse3 4294967296) 4294967296))) (and (< (+ .cse0 .cse1) (+ .cse2 |c_ULTIMATE.start_main_~r~0#1| 1)) (< .cse3 (+ .cse0 .cse1 1)))))) (not (<= (* 2 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) .cse5)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~b~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse0)) (<= (* .cse4 4) .cse5))) is different from true [2022-11-19 08:14:53,983 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse2 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~b~0#1| 536870912)) (.cse1 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (<= (* 8 .cse0) .cse1) (not (= .cse2 (mod (+ (* 8 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296))) (let ((.cse5 (* 8 (* .cse0 |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse3 (+ .cse5 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse4 (* (div .cse3 4294967296) 4294967296))) (and (< .cse3 (+ .cse4 .cse2 1)) (< (+ .cse4 .cse2) (+ .cse5 |c_ULTIMATE.start_main_~r~0#1| 1)))))) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse1)) (not (<= (* (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824) 4) .cse1)))) is different from true [2022-11-19 08:15:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 18 not checked. [2022-11-19 08:15:34,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:34,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25592168] [2022-11-19 08:15:34,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:15:34,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487421668] [2022-11-19 08:15:34,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487421668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:34,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [431075679] [2022-11-19 08:15:34,865 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 08:15:34,865 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:15:34,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:15:34,865 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:15:34,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:15:35,800 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2022-11-19 08:15:35,866 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:15:45,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2253#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:15:45,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:15:45,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:15:45,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2022-11-19 08:15:45,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780235923] [2022-11-19 08:15:45,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:15:45,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 08:15:45,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:45,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 08:15:45,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=747, Unknown=4, NotChecked=174, Total=1056 [2022-11-19 08:15:45,858 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:15:47,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:15:54,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:15:56,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:16:00,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:16:02,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:16:03,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:16:09,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:16:11,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:16:11,839 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2022-11-19 08:16:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:16:11,840 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-11-19 08:16:11,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:16:11,841 INFO L225 Difference]: With dead ends: 96 [2022-11-19 08:16:11,841 INFO L226 Difference]: Without dead ends: 91 [2022-11-19 08:16:11,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=160, Invalid=904, Unknown=4, NotChecked=192, Total=1260 [2022-11-19 08:16:11,845 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 81 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 50 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:16:11,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 236 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 293 Invalid, 5 Unknown, 162 Unchecked, 23.3s Time] [2022-11-19 08:16:11,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-19 08:16:11,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-19 08:16:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 75 states have internal predecessors, (80), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 08:16:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2022-11-19 08:16:11,865 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 27 [2022-11-19 08:16:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:16:11,865 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2022-11-19 08:16:11,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:16:11,866 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2022-11-19 08:16:11,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:16:11,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:16:11,867 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-19 08:16:11,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:12,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 08:16:12,075 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:16:12,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:16:12,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1293804193, now seen corresponding path program 2 times [2022-11-19 08:16:12,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:16:12,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376982037] [2022-11-19 08:16:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:12,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:16:12,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:16:12,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638517472] [2022-11-19 08:16:12,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:16:12,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:16:12,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:16:12,088 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:16:12,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:16:20,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:16:20,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:16:20,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:16:20,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:16:20,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:16:20,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:16:20,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376982037] [2022-11-19 08:16:20,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:16:20,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638517472] [2022-11-19 08:16:20,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638517472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:16:20,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2049309664] [2022-11-19 08:16:20,618 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:16:20,619 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:16:20,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:16:20,619 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:16:20,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:16:21,717 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2022-11-19 08:16:21,736 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:16:22,206 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2713#(and (<= 2 ~counter~0) (<= ~counter~0 6) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:16:22,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:16:22,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:16:22,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2022-11-19 08:16:22,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363298013] [2022-11-19 08:16:22,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:16:22,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:16:22,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:16:22,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:16:22,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:16:22,209 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:16:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:16:22,490 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2022-11-19 08:16:22,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:16:22,494 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2022-11-19 08:16:22,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:16:22,495 INFO L225 Difference]: With dead ends: 109 [2022-11-19 08:16:22,495 INFO L226 Difference]: Without dead ends: 71 [2022-11-19 08:16:22,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:16:22,496 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:16:22,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 113 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:16:22,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-19 08:16:22,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-19 08:16:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 60 states have internal predecessors, (64), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-19 08:16:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-11-19 08:16:22,517 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 29 [2022-11-19 08:16:22,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:16:22,518 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-11-19 08:16:22,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:16:22,518 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-11-19 08:16:22,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 08:16:22,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:16:22,524 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:16:22,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:22,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 08:16:22,760 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:16:22,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:16:22,761 INFO L85 PathProgramCache]: Analyzing trace with hash 34346441, now seen corresponding path program 1 times [2022-11-19 08:16:22,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:16:22,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852462980] [2022-11-19 08:16:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:22,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:16:22,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:16:22,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394509501] [2022-11-19 08:16:22,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:22,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:16:22,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:16:22,775 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:16:22,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:16:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:22,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:16:22,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 08:16:22,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:16:22,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:16:22,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852462980] [2022-11-19 08:16:22,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:16:22,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394509501] [2022-11-19 08:16:22,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394509501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:16:22,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:16:22,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:16:22,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443874194] [2022-11-19 08:16:22,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:16:22,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:16:22,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:16:22,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:16:22,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:16:22,856 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:16:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:16:22,905 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2022-11-19 08:16:22,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:16:22,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-11-19 08:16:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:16:22,907 INFO L225 Difference]: With dead ends: 104 [2022-11-19 08:16:22,907 INFO L226 Difference]: Without dead ends: 71 [2022-11-19 08:16:22,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:16:22,908 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:16:22,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:16:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-19 08:16:22,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-19 08:16:22,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 60 states have internal predecessors, (62), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-19 08:16:22,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2022-11-19 08:16:22,923 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 32 [2022-11-19 08:16:22,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:16:22,923 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2022-11-19 08:16:22,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:16:22,924 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2022-11-19 08:16:22,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 08:16:22,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:16:22,925 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:16:22,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:23,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:16:23,127 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:16:23,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:16:23,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1429545670, now seen corresponding path program 2 times [2022-11-19 08:16:23,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:16:23,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936520596] [2022-11-19 08:16:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:23,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:16:23,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:16:23,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134234784] [2022-11-19 08:16:23,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:16:23,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:16:23,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:16:23,142 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:16:23,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:16:23,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:16:23,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:16:23,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:16:23,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 08:16:24,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 08:16:51,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:16:51,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936520596] [2022-11-19 08:16:51,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:16:51,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134234784] [2022-11-19 08:16:51,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134234784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:16:51,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [230757878] [2022-11-19 08:16:51,792 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 08:16:51,793 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:16:51,793 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:16:51,793 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:16:51,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:16:52,688 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2022-11-19 08:16:52,746 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:17:12,751 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3527#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:17:12,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:17:12,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:17:12,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-11-19 08:17:12,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667702601] [2022-11-19 08:17:12,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:17:12,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 08:17:12,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:17:12,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 08:17:12,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:17:12,753 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:17:14,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:17:18,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:17:19,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:17:19,135 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2022-11-19 08:17:19,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:17:19,136 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-11-19 08:17:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:17:19,137 INFO L225 Difference]: With dead ends: 95 [2022-11-19 08:17:19,137 INFO L226 Difference]: Without dead ends: 88 [2022-11-19 08:17:19,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-11-19 08:17:19,138 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:17:19,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 86 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 2 Unknown, 27 Unchecked, 5.5s Time] [2022-11-19 08:17:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-19 08:17:19,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2022-11-19 08:17:19,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 64 states have (on average 1.09375) internal successors, (70), 68 states have internal predecessors, (70), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 08:17:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2022-11-19 08:17:19,159 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 33 [2022-11-19 08:17:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:17:19,160 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2022-11-19 08:17:19,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:17:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2022-11-19 08:17:19,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 08:17:19,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:17:19,161 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:17:19,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:17:19,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:17:19,367 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:17:19,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:17:19,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1427758210, now seen corresponding path program 3 times [2022-11-19 08:17:19,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:17:19,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914601619] [2022-11-19 08:17:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:17:19,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:17:19,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:17:19,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690342526] [2022-11-19 08:17:19,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:17:19,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:17:19,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:17:19,380 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:17:19,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 08:17:19,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:17:19,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:17:19,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:17:19,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:17:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:17:19,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:17:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 42 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:17:19,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:17:19,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914601619] [2022-11-19 08:17:19,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:17:19,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690342526] [2022-11-19 08:17:19,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690342526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:17:19,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2122127950] [2022-11-19 08:17:19,584 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:17:19,584 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:17:19,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:17:19,584 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:17:19,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:17:20,385 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2022-11-19 08:17:20,405 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:17:20,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3989#(and (<= 2 ~counter~0) (<= ~counter~0 6) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:17:20,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:17:20,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:17:20,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2022-11-19 08:17:20,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350093367] [2022-11-19 08:17:20,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:17:20,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:17:20,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:17:20,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:17:20,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:17:20,859 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:17:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:17:20,929 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2022-11-19 08:17:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:17:20,929 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2022-11-19 08:17:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:17:20,930 INFO L225 Difference]: With dead ends: 94 [2022-11-19 08:17:20,930 INFO L226 Difference]: Without dead ends: 68 [2022-11-19 08:17:20,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:17:20,931 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:17:20,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 72 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:17:20,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-19 08:17:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-19 08:17:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 57 states have internal predecessors, (57), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-19 08:17:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-11-19 08:17:20,948 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 33 [2022-11-19 08:17:20,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:17:20,949 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-11-19 08:17:20,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:17:20,949 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-11-19 08:17:20,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 08:17:20,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:17:20,950 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 08:17:20,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 08:17:21,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 08:17:21,156 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:17:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:17:21,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1290773767, now seen corresponding path program 3 times [2022-11-19 08:17:21,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:17:21,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627502323] [2022-11-19 08:17:21,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:17:21,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:17:21,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:17:21,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71266269] [2022-11-19 08:17:21,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:17:21,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:17:21,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:17:21,196 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:17:21,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 08:17:21,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:17:21,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:17:21,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:17:21,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:17:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:17:21,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:17:21,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:17:21,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627502323] [2022-11-19 08:17:21,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:17:21,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71266269] [2022-11-19 08:17:21,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71266269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:17:21,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:17:21,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:17:21,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105529335] [2022-11-19 08:17:21,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:17:21,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:17:21,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:17:21,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:17:21,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:17:21,326 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:17:21,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:17:21,384 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-11-19 08:17:21,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:17:21,385 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-11-19 08:17:21,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:17:21,385 INFO L225 Difference]: With dead ends: 75 [2022-11-19 08:17:21,386 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 08:17:21,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:17:21,387 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:17:21,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 71 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:17:21,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 08:17:21,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 08:17:21,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:17:21,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 08:17:21,389 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2022-11-19 08:17:21,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:17:21,389 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 08:17:21,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:17:21,389 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 08:17:21,389 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 08:17:21,392 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 08:17:21,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 08:17:21,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 08:17:21,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-19 08:17:35,464 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-19 08:17:35,464 INFO L902 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: true [2022-11-19 08:17:35,464 INFO L899 garLoopResultBuilder]: For program point L38(lines 38 47) no Hoare annotation was computed. [2022-11-19 08:17:35,464 INFO L895 garLoopResultBuilder]: At program point L38-2(lines 38 47) the Hoare annotation is: (= (mod |ULTIMATE.start_main_~A~0#1| 4294967296) (mod (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296)) [2022-11-19 08:17:35,464 INFO L899 garLoopResultBuilder]: For program point L34-1(lines 34 37) no Hoare annotation was computed. [2022-11-19 08:17:35,465 INFO L895 garLoopResultBuilder]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse2 (mod |ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse4 (<= (mod (div |ULTIMATE.start_main_~b~0#1| 2) 4294967296) .cse2)) (.cse0 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (= |ULTIMATE.start_main_~b~0#1| 8) .cse0 .cse1 (<= 4 .cse2) .cse3 (<= 3 ~counter~0)) (and (<= 0 ~counter~0) (<= ~counter~0 0) .cse0 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~b~0#1|) .cse1 .cse3) (and (<= ~counter~0 1) (<= 1 ~counter~0) (<= 1 .cse2) .cse0 .cse1 (= 2 |ULTIMATE.start_main_~b~0#1|) .cse3) (and .cse4 .cse0 .cse1 (<= 4 ~counter~0) .cse3 (= (mod |ULTIMATE.start_main_~b~0#1| 2) 0)) (and (<= 2 ~counter~0) .cse4 (= |ULTIMATE.start_main_~b~0#1| 4) .cse0 .cse1 .cse3 (<= ~counter~0 2))))) [2022-11-19 08:17:35,465 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-19 08:17:35,465 INFO L895 garLoopResultBuilder]: At program point L43-2(lines 26 50) the Hoare annotation is: (let ((.cse12 (mod |ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse5 (mod |ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse2 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~b~0#1|)) (.cse0 (not (<= .cse12 .cse5))) (.cse7 (< ~counter~0 4)) (.cse1 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1)) (.cse8 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse6 (mod |ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse9 (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse10 (<= 4 ~counter~0))) (or (and .cse0 (<= ~counter~0 1) .cse1 .cse2 .cse3 .cse4) (and .cse0 (<= 1 .cse5) .cse1 .cse3 (= 2 |ULTIMATE.start_main_~b~0#1|) .cse4 (<= ~counter~0 2)) (and (not (<= 2 .cse6)) .cse7 .cse8 .cse9 .cse2 (<= 1 .cse6) .cse4) (and (= |ULTIMATE.start_main_~b~0#1| 8) .cse0 .cse1 .cse3 (<= 4 .cse5) .cse10 .cse4) (and (<= 5 ~counter~0) (= .cse6 (mod (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296))) (and (<= (mod (div |ULTIMATE.start_main_~b~0#1| 2) 4294967296) .cse5) .cse0 (= |ULTIMATE.start_main_~b~0#1| 4) .cse7 .cse1 .cse3 .cse4 (<= 3 ~counter~0)) (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (< |ULTIMATE.start_main_~b~0#1| 2147483648) (let ((.cse11 (* 2 (* |ULTIMATE.start_main_~q~0#1| (div .cse12 2))))) (< (+ (* (div (+ .cse11 |ULTIMATE.start_main_~r~0#1|) 4294967296) 4294967296) .cse6) (+ .cse11 |ULTIMATE.start_main_~r~0#1| 1))) .cse8 (exists ((|aux_div_v_ULTIMATE.start_main_~b~0#1_77_50| Int) (|aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72| Int)) (let ((.cse13 (+ (* 2 |ULTIMATE.start_main_~b~0#1|) (* |aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72| 4294967296)))) (and (< .cse13 4294967296) (< .cse6 .cse13) (<= (mod (+ |ULTIMATE.start_main_~b~0#1| (* |aux_div_v_ULTIMATE.start_main_~b~0#1_77_50| 2147483648) (* |aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72| 2147483648)) 4294967296) .cse6)))) .cse9 .cse10)))) [2022-11-19 08:17:35,466 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse7 (mod |ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse1 (mod |ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse0 (not (<= .cse7 .cse1))) (.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse5 (<= 5 ~counter~0)) (.cse11 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse13 (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse6 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~b~0#1|)) (.cse10 (mod |ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse8 (< ~counter~0 5)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 (< ~counter~0 4) (<= 1 .cse1) .cse2 .cse3 (= 2 |ULTIMATE.start_main_~b~0#1|) .cse4) (and (= |ULTIMATE.start_main_~b~0#1| 8) .cse0 .cse2 .cse3 (<= 4 .cse1) .cse4 .cse5) (and .cse2 .cse6 .cse3 (< .cse1 .cse7) .cse4 (<= ~counter~0 2)) (and (<= (mod (div |ULTIMATE.start_main_~b~0#1| 2) 4294967296) .cse1) .cse0 (= |ULTIMATE.start_main_~b~0#1| 4) .cse2 .cse3 (<= 4 ~counter~0) .cse8 .cse4) (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (< |ULTIMATE.start_main_~b~0#1| 2147483648) (let ((.cse9 (* 2 (* |ULTIMATE.start_main_~q~0#1| (div .cse7 2))))) (< (+ (* (div (+ .cse9 |ULTIMATE.start_main_~r~0#1|) 4294967296) 4294967296) .cse10) (+ .cse9 |ULTIMATE.start_main_~r~0#1| 1))) .cse11 (exists ((|aux_div_v_ULTIMATE.start_main_~b~0#1_77_50| Int) (|aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72| Int)) (let ((.cse12 (+ (* 2 |ULTIMATE.start_main_~b~0#1|) (* |aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72| 4294967296)))) (and (< .cse12 4294967296) (< .cse10 .cse12) (<= (mod (+ |ULTIMATE.start_main_~b~0#1| (* |aux_div_v_ULTIMATE.start_main_~b~0#1_77_50| 2147483648) (* |aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72| 2147483648)) 4294967296) .cse10)))) .cse13 .cse5) (and (not (<= 2 .cse10)) .cse11 .cse13 .cse6 (<= 1 .cse10) .cse8 .cse4)))) [2022-11-19 08:17:35,466 INFO L899 garLoopResultBuilder]: For program point L39-1(lines 38 47) no Hoare annotation was computed. [2022-11-19 08:17:35,466 INFO L899 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2022-11-19 08:17:35,466 INFO L899 garLoopResultBuilder]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2022-11-19 08:17:35,467 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2022-11-19 08:17:35,467 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2022-11-19 08:17:35,467 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2022-11-19 08:17:35,467 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2022-11-19 08:17:35,467 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2022-11-19 08:17:35,470 INFO L444 BasicCegarLoop]: Path program histogram: [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:17:35,472 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 08:17:35,480 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] [2022-11-19 08:17:35,481 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] [2022-11-19 08:17:35,481 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_77_50,QUANTIFIED] [2022-11-19 08:17:35,481 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] [2022-11-19 08:17:35,489 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] [2022-11-19 08:17:35,490 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] [2022-11-19 08:17:35,490 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_77_50,QUANTIFIED] [2022-11-19 08:17:35,490 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] [2022-11-19 08:17:35,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:17:35 BoogieIcfgContainer [2022-11-19 08:17:35,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 08:17:35,494 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 08:17:35,495 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 08:17:35,495 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 08:17:35,495 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:10:56" (3/4) ... [2022-11-19 08:17:35,498 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-19 08:17:35,504 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-19 08:17:35,507 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-11-19 08:17:35,507 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-19 08:17:35,507 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-19 08:17:35,507 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-19 08:17:35,531 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((!(b % 4294967296 <= r % 4294967296) && counter <= 1) && q == 0) && B == b) && A == r) && B == 1) || ((((((!(b % 4294967296 <= r % 4294967296) && 1 <= r % 4294967296) && q == 0) && A == r) && 2 == b) && B == 1) && counter <= 2)) || ((((((!(2 <= A % 4294967296) && counter < 4) && q == 1) && b + r == A) && B == b) && 1 <= A % 4294967296) && B == 1)) || ((((((b == 8 && !(b % 4294967296 <= r % 4294967296)) && q == 0) && A == r) && 4 <= r % 4294967296) && 4 <= counter) && B == 1)) || (5 <= counter && A % 4294967296 == (r + b * q) % 4294967296)) || (((((((b / 2 % 4294967296 <= r % 4294967296 && !(b % 4294967296 <= r % 4294967296)) && b == 4) && counter < 4) && q == 0) && A == r) && B == 1) && 3 <= counter)) || ((((((0 <= b && b < 2147483648) && (2 * (q * (b % 4294967296 / 2)) + r) / 4294967296 * 4294967296 + A % 4294967296 < 2 * (q * (b % 4294967296 / 2)) + r + 1) && q == 1) && (\exists aux_div_v_ULTIMATE.start_main_~b~0#1_77_50 : int, aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72 : int :: (2 * b + aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72 * 4294967296 < 4294967296 && A % 4294967296 < 2 * b + aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72 * 4294967296) && (b + aux_div_v_ULTIMATE.start_main_~b~0#1_77_50 * 2147483648 + aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72 * 2147483648) % 4294967296 <= A % 4294967296)) && b + r == A) && 4 <= counter) [2022-11-19 08:17:35,540 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 08:17:35,541 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 08:17:35,541 INFO L158 Benchmark]: Toolchain (without parser) took 400381.49ms. Allocated memory was 121.6MB in the beginning and 197.1MB in the end (delta: 75.5MB). Free memory was 87.6MB in the beginning and 99.5MB in the end (delta: -11.8MB). Peak memory consumption was 63.5MB. Max. memory is 16.1GB. [2022-11-19 08:17:35,542 INFO L158 Benchmark]: CDTParser took 0.87ms. Allocated memory is still 83.9MB. Free memory was 38.9MB in the beginning and 38.8MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:17:35,542 INFO L158 Benchmark]: CACSL2BoogieTranslator took 319.34ms. Allocated memory is still 121.6MB. Free memory was 87.5MB in the beginning and 96.9MB in the end (delta: -9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 08:17:35,542 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.34ms. Allocated memory is still 121.6MB. Free memory was 96.9MB in the beginning and 95.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:17:35,543 INFO L158 Benchmark]: Boogie Preprocessor took 34.17ms. Allocated memory is still 121.6MB. Free memory was 94.9MB in the beginning and 94.0MB in the end (delta: 845.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:17:35,543 INFO L158 Benchmark]: RCFGBuilder took 462.95ms. Allocated memory is still 121.6MB. Free memory was 94.0MB in the beginning and 82.3MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 08:17:35,544 INFO L158 Benchmark]: TraceAbstraction took 399467.60ms. Allocated memory was 121.6MB in the beginning and 197.1MB in the end (delta: 75.5MB). Free memory was 81.4MB in the beginning and 101.6MB in the end (delta: -20.1MB). Peak memory consumption was 103.2MB. Max. memory is 16.1GB. [2022-11-19 08:17:35,544 INFO L158 Benchmark]: Witness Printer took 46.29ms. Allocated memory is still 197.1MB. Free memory was 101.6MB in the beginning and 99.5MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:17:35,546 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.87ms. Allocated memory is still 83.9MB. Free memory was 38.9MB in the beginning and 38.8MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 319.34ms. Allocated memory is still 121.6MB. Free memory was 87.5MB in the beginning and 96.9MB in the end (delta: -9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.34ms. Allocated memory is still 121.6MB. Free memory was 96.9MB in the beginning and 95.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.17ms. Allocated memory is still 121.6MB. Free memory was 94.9MB in the beginning and 94.0MB in the end (delta: 845.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 462.95ms. Allocated memory is still 121.6MB. Free memory was 94.0MB in the beginning and 82.3MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 399467.60ms. Allocated memory was 121.6MB in the beginning and 197.1MB in the end (delta: 75.5MB). Free memory was 81.4MB in the beginning and 101.6MB in the end (delta: -20.1MB). Peak memory consumption was 103.2MB. Max. memory is 16.1GB. * Witness Printer took 46.29ms. Allocated memory is still 197.1MB. Free memory was 101.6MB in the beginning and 99.5MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_77_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_77_50,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] * 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 - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 399.3s, OverallIterations: 16, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 52.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 13.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 mSolverCounterUnknown, 337 SdHoareTripleChecker+Valid, 46.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 325 mSDsluCounter, 1259 SdHoareTripleChecker+Invalid, 45.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 294 IncrementalHoareTripleChecker+Unchecked, 965 mSDsCounter, 121 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 956 IncrementalHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 121 mSolverCounterUnsat, 294 mSDtfsCounter, 956 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 677 GetRequests, 460 SyntacticMatches, 14 SemanticMatches, 203 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 77.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=11, InterpolantAutomatonStates: 119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 60 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 55 PreInvPairs, 88 NumberOfFragments, 615 HoareAnnotationTreeSize, 55 FomulaSimplifications, 594 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 6 FomulaSimplificationsInter, 1330 FormulaSimplificationTreeSizeReductionInter, 13.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 8.8s SatisfiabilityAnalysisTime, 279.5s InterpolantComputationTime, 342 NumberOfCodeBlocks, 318 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 483 ConstructedInterpolants, 9 QuantifiedInterpolants, 5452 SizeOfPredicates, 32 NumberOfNonLiveVariables, 1167 ConjunctsInSsa, 190 ConjunctsInUnsatCore, 24 InterpolantComputations, 9 PerfectInterpolantSequences, 338/437 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant [2022-11-19 08:17:35,569 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] [2022-11-19 08:17:35,569 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] [2022-11-19 08:17:35,569 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_77_50,QUANTIFIED] [2022-11-19 08:17:35,569 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] [2022-11-19 08:17:35,571 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] [2022-11-19 08:17:35,571 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] [2022-11-19 08:17:35,571 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~b~0#1_77_50,QUANTIFIED] [2022-11-19 08:17:35,571 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72,QUANTIFIED] Derived loop invariant: ((((((((((!(b % 4294967296 <= r % 4294967296) && counter <= 1) && q == 0) && B == b) && A == r) && B == 1) || ((((((!(b % 4294967296 <= r % 4294967296) && 1 <= r % 4294967296) && q == 0) && A == r) && 2 == b) && B == 1) && counter <= 2)) || ((((((!(2 <= A % 4294967296) && counter < 4) && q == 1) && b + r == A) && B == b) && 1 <= A % 4294967296) && B == 1)) || ((((((b == 8 && !(b % 4294967296 <= r % 4294967296)) && q == 0) && A == r) && 4 <= r % 4294967296) && 4 <= counter) && B == 1)) || (5 <= counter && A % 4294967296 == (r + b * q) % 4294967296)) || (((((((b / 2 % 4294967296 <= r % 4294967296 && !(b % 4294967296 <= r % 4294967296)) && b == 4) && counter < 4) && q == 0) && A == r) && B == 1) && 3 <= counter)) || ((((((0 <= b && b < 2147483648) && (2 * (q * (b % 4294967296 / 2)) + r) / 4294967296 * 4294967296 + A % 4294967296 < 2 * (q * (b % 4294967296 / 2)) + r + 1) && q == 1) && (\exists aux_div_v_ULTIMATE.start_main_~b~0#1_77_50 : int, aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72 : int :: (2 * b + aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72 * 4294967296 < 4294967296 && A % 4294967296 < 2 * b + aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72 * 4294967296) && (b + aux_div_v_ULTIMATE.start_main_~b~0#1_77_50 * 2147483648 + aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_77_50_52_72 * 2147483648) % 4294967296 <= A % 4294967296)) && b + r == A) && 4 <= counter) - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((b == 8 && q == 0) && A == r) && 4 <= r % 4294967296) && B == 1) && 3 <= counter) || (((((0 <= counter && counter <= 0) && q == 0) && B == b) && A == r) && B == 1)) || ((((((counter <= 1 && 1 <= counter) && 1 <= r % 4294967296) && q == 0) && A == r) && 2 == b) && B == 1)) || (((((b / 2 % 4294967296 <= r % 4294967296 && q == 0) && A == r) && 4 <= counter) && B == 1) && b % 2 == 0)) || ((((((2 <= counter && b / 2 % 4294967296 <= r % 4294967296) && b == 4) && q == 0) && A == r) && B == 1) && counter <= 2) RESULT: Ultimate proved your program to be correct! [2022-11-19 08:17:35,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30319a09-6083-44e2-9b07-56c3c8ac466b/bin/utaipan-I9t0OCRTmS/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 Result: TRUE